Sexy Stepsister Spy, Part One

  • Posted on May 14, 2015 at 8:11 am

By eloquent delinquent

Even though the new house was big, it felt small, because of Mina. When Kristin got home from private school three weeks ago, she thought her new stepmom’s house up in the hills looked awesome. It had a big, private backyard with a pool and huge deck. One wall of the great room was all glass and had a view over the whole city, and a big stone fireplace. The high-ceilinged rooms wandered into each other, little stairs and split-levels separating them more than doors. The editing studio doubled as an amazing movie room.

No wonder Dad wanted to move in here when he married Janelle. The house they’d shared before was nice, but plain by comparison, and it was full of memories of Mom, who’d gotten sick and passed away when Kristin was very young, which made the old house a bit sad. This was a great place for new beginnings, like Dad said at the wedding. Kristin only regretted that she had to wait a month to see the place.

What she hadn’t counted on when she saw the place was her new baby stepsister, Mina, 11 to Kristin’s 15 years, rambunctious and goofy to Kristin’s carefully cultivated cool. There wasn’t anything really wrong with Mina – she was an adorable girl, with thick straight honey blonde hair she kept cut just below her shoulders and almost always pulled back into a ponytail or pigtails for playing on one of her many sports teams, enormous green eyes like her mom, a dimpled chin, and a fit, sunkissed body. She was outgoing and sweet and curious. The two of them had gotten along really well when Dad and Janelle were dating, chatting or running off on their own during some outing. Kristin could tell she was going to grow up to be as gorgeous as her mom and way prettier than herself, and honestly, sometimes she had flushing feelings towards them both that made her a little uncomfortable, considering they were family now. Here in the house, though, even as big as it was, her new little sister always seemed to be underfoot. When she ambled into the kitchen to get a snack, there was Mina. Go for a swim, so was Mina. Time for a movie, Mina’s bringing the popcorn and snuggling right up to her. Frequently at night, Mina would creep into Kristin’s room and bound into her giant new bed for sleepover-style chat and a cuddle, and she’d end up sleeping there, which Kristin couldn’t really object to because the bed was so huge she hardly knew Mina was in it. She was full of questions, and in one way it made Kristin feel important and grown up and admired, and she had to admit Mina was a lot of fun, lively and very creative. But there was just no escaping her – she was home for the summer, didn’t know anyone in the neighborhood yet, was too young to drive, and had to wait for the weekends to have Dad or Janelle take her anywhere. Always being with a kid made her feel like a kid.

But… But that really wasn’t all of it. Kristin craved privacy for another reason. When she was Mina’s age, she discovered her body, and all the pleasure she could get from it. At first, she liked just being nude under the covers, running her hands lightly all over her skin and the thrilling shivers it gave her. It got so that she did it every night, soothing herself to sleep. The next summer, she and her Dad rented a remote cabin by a lake, and Kristin would go on “hikes” almost every afternoon, finding secluded spots in the woods or on the shore, stripping naked, and stroking her skin all over in the crisp sunny air, or rub her slippery flesh in the cool lake, then sun herself on the beach, get all sweaty, then wipe the sweat all over herself. The sweaty stuff felt a little dirty, but she liked it most, realizing later it was for that very reason.

Shortly after that happy summer, she’d been bundled on the couch watching tv alone one rainy afternoon, and she’d thoughtlessly jammed a throw pillow between her legs, trying to get comfy. The show was kind of romantic and exciting, and when she got that funny feeling down there, the pressure of the pillow suddenly became delicious, and without really thinking about it, soon she was rolling her hips slowly, pressing her excited puss into it. She started breathing heavy, and it got better and better, and though she didn’t orgasm (or even know what that was yet), she’d found a new favorite thing.

Her nightly ritual changed, adding the pillow humping to the naked stroking under the covers. She knew that when girls got naked and did stuff with their pussies, that was sex, and she figured she was doing sex to herself, which felt naughty and wonderful. But she knew she had to keep it from Dad, because sex was secret, and besides, ew, it’s Dad. That did nothing to slow her down, and soon her nightly activities brought her hand in direct contact with her little wet puss, and it felt like melting, it felt like rockets, and that very first night playing with her fingers she got her very first cum, and it was better than anything. When she was done shuddering and clamping her legs together and gasping with surprised delight, she laughed. She laughed like a pirate finding buried treasure, and from down the hall, her Dad shushed her.

She stopped laughing so loudly, but she didn’t stop stroking her pussy. From the internet, she found out what she was doing was called masturbating, and she loved that word, sometimes she would just think the word ‘masturbate,’ and get all wet and tender down there. Kristin masturbated every chance she could, two or three times a day usually – Dad was at work in the afternoon when she got home from school, and she could always do it in the shower or in bed. Her body was a toy, one that never got boring or wore out. And she loved learning new ways to play with that toy between her legs. The internet was full of ideas for her and her horny little pussy. Stories, pictures, movies. She learned to pinch her clit and rub it like a little boy’s penis. She popped her own cherry with a hairbrush handle, and the next night she fucked it twice, getting massive orgasms both times. She smelled her own dirty panties while she masturbated. She watched a video of a masturbating girl who rolled over and started touching her pretty puckered asshole, then slip her finger inside and start to fuck it. She couldn’t wait to try it – it was seemed so dirty. And after she did, she wanted to send that video girl a thank-you note. She got to love sniffing and sucking her fingers after they’d played in her pussy and ass. By then she was still only 12. Her dad liked to joke that she was 12 going on 20, she was developing so fast. Secretly, Kristin suspected that playing with herself had brought it on. The girls she at school she confided in about what she did looked at her in blank incomprehension, and sometimes acted grossed out. Except for Tracy, who had ‘secret bathtime’ with her big sister whenever their parents were away. She wanted to have a sleepover with Tracy, but never managed it.

One night in the shower, hunched over with a soapy finger slipping over her clit and another deep in her butt, she came so hard she started peeing all over herself, uncontrollably. It was so dirty, the heat and the smell of her pee splashing all over her hand and down her legs, hotter even than the shower. Kristin couldn’t resist, she kept on rubbing her messy pussy even more fervently, sucking the finger that had been in her rectum, until she came again, hips bucking, and this time she tried to let her pee go and she pissed herself again. When the stream stopped, she wiped it all over her tummy and little, sensitive tits, then licked her fingers. In less than a month, she was pissing herself at least once a week. Before long, Kristin was perched on the toilet, feet on either edge of the seat. She masturbated her exposed pussy while a spit-slicked finger fucked her little asshole, feeling the deep sensations pulsing and quivering in her rectum and anus as her pussy bloomed with joy. She was just like the girls she watched on the internet. She felt so filthy, so naughty, so horny. And when she came, it was just as crushing in its ecstasy as the videos had promised. She had to lean back against the toilet tank to stay upright and sprayed pee all over the bathroom floor. It was heavenly.

She was a 12-year old dirty little sex fiend, and every new way to play just made her want to masturbate more. Kristin got so obsessed, stayed up so late searching the internet and pleasuring herself, that her grades slipped. Like, a lot. Her Dad, thinking that it was the loss of her Mom that was messing her up, sent her to a counselor. Initially, Kristin denied and lied her ass off, but Dr Erhardt was kind and patient, even though she knew Kristin wasn’t being honest. Finally, she confessed everything, every dirty thing. Her counselor was totally compassionate, though, assuring her that her sex drive, though strong and precocious, was healthy. She suggested that it might help if she had more structure, and a little more outside discipline, so that she could keep her education and her pleasure balanced.

Kristin and her Dad met with Dr Erhardt, and, without telling him anything about her secret sex life, suggested that changing her environment for a while might be a good thing. Together, they decided on St Bernadette’s Exemplary School, a private Catholic boarding school with a great reputation.

The school had its intended effect, and within two months, she was doing better than ever in her classes. But Dr Erhardt had been right – with just a little self-control, 13-year old Kristin could have the best of both worlds. She kept up her masturbation habit (by now it was something that she couldn’t imagine doing without), made time to play with herself daily and often several times on the weekends.

At first, she was desperately secretive, waiting until the dead of night to strip under the covers, or sneaking into the storage room at the end of her floor, or locking herself in the private handicapped bathroom. But that gradually changed. Kristin was a lovely, popular girl, her dark hair cut right at her jawline and a raven’s wing of bangs sweeping across her forehead, liquid brown eyes, and figure that was quite ahead of its true age. She loved to have deep philosophical talks, and now used the internet to find cool indie bands, sharing her discoveries.

One night, though, she must’ve gotten a little carried away. Deep within her own masturbatory delight, doing it just the way she liked best, she heard rustling blankets and glanced over, startled, to see the curly-headed silhouette of her roommate, Paulette, sitting up on one elbow across the narrow space that separated their bunks. Kristin tried to keep still, but she was panting with desire, and her hips continued to thrust up into her trapped fingers, instinctively trying to finish what she’d started. Without a word, Paulette slipped out of her bed and stood right above Kristin, who was frozen, mortified. The curly-haired roommate made a shushing gesture, dragged the sheets off Kristin’s naked body, one hand still in her love nest and the other wrapped behind. Then Paulette whispered, “Go on.” With a little thrill of disbelief, Kristin did, and while she played with herself, Paulette pulled up her nightdress and slipped her hand inside her panties, all the while watching Kristin thoughtfully. After the night when her roommate heard what Kristin was doing in her bed, she found out that sex wasn’t as taboo as she imagined, in some circles. All kinds of secretive lusts played out at St Bernadette’s, between classes or after lights out. A few of the older girls took quite a shine to her, teaching her, and sometimes learning from her, too. So for the past couple years it’s been like that at school. Studying hard, making friends, and having not-so-secret sex every day, either by herself, with one of her classmates, or sometimes even with the boys at nearby St Mark’s. And now she was at home, getting more and more needy and pent-up, and Mina still followed her around like a puppy. For the first week, she wasn’t able to masturbate at all, and she actually found herself getting depressed. She had to do something, find some way to get enough privacy to take care of herself. Then, she got an idea.

*****

Kristin’s cell phone gently chimed on the nightstand, sending a blue glow onto the ceiling that Mina saw through half-closed eyes. She heard her shiny new 15-year old sister rustle in the blankets, and she shut her eyes and played dead, knowing that Kristin was checking on her, to see if she was asleep. She felt the bed shift as Kristin got out of it, and heard the older girl pad her way barefoot out of the room.

When she heard the bathroom door click shut, Mina sprang up, opening her eyes and looking to the cell phone. 1:30 am. The same time as before. She felt the curious sensation of her little pussy tingling and moistening just thinking about it. It used to be that Mina only felt that way once in a while, watching people kiss hungrily on tv, or sometimes in the changing room after practice, when one of the older girls undressed right next to her. But now that Kristin’s been home, she felt that tingle almost all the time. She didn’t know what to think of it, exactly, only that it made her nervous and terribly excited, and that the closer she got to Kristin, the stronger it felt. Mina wanted to snuggle up against her, to gobble her up, oh my God she didn’t even know what she wanted to do. Kristin was so tall and pretty and cool, and now she was Mina’s sister! Mina knew what crushes were – she’d had them before – and she knew she had a crush on Kristin. But where her crushes on the occasional boy or girl at school were funny, fleeting things, this one kept getting stronger and stronger.

Mina felt a bottomless curiosity about Kristin, wanted to know everything she felt and did. She loved looking at her, especially when she was in her blue one piece swimsuit or the outfit that was like her school uniform. She especially liked watching her older sister applying her eye makeup, the liner and shadow making her look so mysterious and kind of wicked. She suddenly found herself with access to the world of older girls, of what it was like to be a little more grownup, and she wanted to learn all she could.

And that’s why she flipped on the bedside lamp and felt around on the dresser where she’d hidden the little hex-wrench thingie she’d found in her stepdad’s toolbox. She wanted to spy.

She got out of bed, tugging her pajama top down over her flat tummy and shaking the rumples out of the flannel legs, and crept down the hall, following in her stepsister’s footsteps. Mina’s heartbeat began to pound and her belly felt all fluttery with nerves. She stopped at the door and carefully put her ear to it.

From inside the bathroom, she could hear Kristin’s long, sighing breaths. Mina smiled mischievously in the dark, because she knew she was going to get to see it again. Earlier in the week, she’d felt Kristin leave the bed as she had tonight, and when she headed to the bathroom, Mina was still half-asleep and didn’t really think anything of it, beyond wanting one little cuddle when her pretty stepsister came back. But minutes passed, and then even more, and still no Kristin. She checked the cell phone on the nightstand, and it was super late, like 1:30, and she noticed the alarm had just been shut off, the icon still fading on its screen. What would anyone wake up in the middle of the night for? Curious, Mina slipped out of bed and went to knock on the bathroom door and make sure everything was okay. But what she heard stopped her.

Inside the bathroom, Kristin was making the strangest noises, moaning, gasping, making little exclamations, and all the while there was this slick noise, like someone vigorously washing their hands. Mina didn’t know what to make of her sister’s sounds (except that she remembered Mom making them at night sometimes before she met her stepdad Max), but even more curious was the instant response her body had to what she was hearing. Her skin shivered into goosebumps, her cheeks got blushy, she had trouble breathing, and between her legs, she felt this warm heaviness settle in, making her bare little peepee feel all swollen. And it got wet, she could feel it getting wetter while she listened to Kristin’s strangely exciting noises. It gave her this delicious slippery feeling down there while she rocked nervously in front of the door.

At that point, Kristin cried out, a rhythmic cry that almost sounded like pain but sounded like something completely different too, almost like the cheering she heard at a soccer game. It was all tremendously intriguing. What was going on in there?

The cries faded into long moans, and sighs, and then quiet. Mina got scared, ready to bolt back to the bed and keep from getting caught, but then she heard the shower start, and the toilet flush. She knew she was safe, and she got a secret little grin as she ambled back to Kristin’s bed, feeling a strange but not unpleasant dampness between the tops of her thighs.

The next morning, she knew she had to figure out what happened to Kristin. She looked around the bathroom thoroughly, but there was no sign. So she started studying the doorknob, in case it happened again. There was a tiny hole on the outside of the knob, and with a little rummaging to find the right tool, Mina found she could pop the lock almost silently. She got a giddy rush when she figured it out.

That same night, Mina lay wide awake, feeling fidgety and restless. The gentle trill of Kristin’s alarm startled her into stillness. Not knowing what to do, she feigned sleep. She heard and felt her stepsister move and lean over her, and Mina supposed Kristin was making sure she was asleep. She didn’t move. Kristin got out of bed, and went straight to the bathroom, like before. Mina could barely force herself to wait the handful of minutes necessary to ensure that Kristin wasn’t just going potty. But once she was sure, she got out of bed, and took the tool from where she hid it under her pillow.

She snuck up to the door and listened for a moment. And again, she heard sighs and gentle coos from Kristin on the other side. They weren’t as loud as the night before, but the effect on Mina was instant and exactly the same shivery, dampening excitement as before. She could barely keep her hand still enough to put the fine rod into the tiny hole of the knob. Feeling the quiet click of the mechanism, she turned the knob slowly, and eased the door open, just a crack.

The first thing she noticed was that the light was low, warm and orange, just the heat lamp on over the tub. The smoked glass of the shower doors made these wavy amber patterns across the room. Just to the right of the door, next to the linen closet, was the potty, and just past that was a long vanity with two sinks and a huge mirror above it. And next to the vanity was Kristin, completely naked, the oversize t-shirt and panties she wore to bed in a pile on the bathroom floor.

Mina drew in a long, amazed breath. She never realized how badly she’d wanted to see her stepsister nude, but from the way her pulse raced, she knew then that she had. She devoured Kristin’s image, both before her and reflected in the mirror. Her legs weren’t long but were shapely and obviously strong. She had a little nest of dark black hair over her peepee, the way some older girls in soccer did. And her butt, her naked butt! It was so pretty, a firm, prominent, perfect curve, and the swell of her round hips tapered into a small waist, with two little dimples right on her back right above her lovely bottom. Kristin swept the fingers of one hand back and forth over the taut contour of her belly, and above that were her naked boobies. Mina smiled as she admired them, they rode high on her chest, the swell a flawless soft curve, capped by hard brownish nipples that pointed just slightly upward. They may have been just a 15-year old’s C-cups, but to Mina they were perfect.

Kristin was swaying gently before the mirror, fingertips gliding over the creamy skin of her torso, considering herself. Her short, dark hair was loose and wild. She must have forgotten to take off her makeup before bed, because now her eyeliner was smudged and smoky and made her eyes look bigger and more intense than they did during the day. Mina found the effect mesmerizing and a little scary.

Kristin started making little pouty faces at herself, and her breathing got deeper and faster, the sighs more frequent. Mina saw her squeeze her full hip while her hands wandered around. She cupped her marvelous breast and Mina got a little quiver. Then, her stepsister got into this pose, twisting her hips so she could look at her bottom over her shoulder in the mirror, resting her chin on her shrugged-up shoulder. She looked so adorable, like a model. Then she reached one hand around, squeezed a firm ample cheek, and bending forward a little, spread herself open, revealing the crack and her puckered pinkish butt hole to the mirror, and to Mina. The 11-year old gasped as a completely new and strange thrill shot through her, leaving her sheened with perspiration, and making her peepee throb steadily. It was getting really wet and almost feverishly warm, as she kept spying.

Straightening and turning to face the mirror, Kristin leaned against the counter, and with a purring sigh and a little grin, she began stroking and squeezing her boobies, her thumbs brushing the already hard nipples. She rocked a little while she did it. Mina slipped a hand up under her pajama top and ran it over her own flat chest, to see how it felt, and when she touched her nipple, she got a happy feeling that she could only think of as sparkly.

Still fondling her breasts with one hand, Kristin’s other hand strayed down her tummy and into the dark triangle between her legs. Mina thought she must have an itch down there, but her hand just stayed, moving around a little, and then Kristin made one of the moans, like from the night before, and Mina knew this was something totally new, something really grownup and naughty and secret. Her stepsister’s eyes glowed as she watched herself rubbing her peepee, her butt moved slightly, up and down. Her mouth was open, and Mina could see the tip of her tongue kinda poking out.

Then she did something startling. Kristin lifted the hand which had been rubbing, and popped one of her fingers into her mouth and sucked on it. She moaned again, and her body did this little shimmy. Mina’s response was a jumble, she wanted to be appalled, but was terribly fascinated – obviously Kristin thought it was good, tasting her own peepee, so maybe it was just a grownup thing she’d learn to like.

This is sex, Mina thought. When the older girls giggle and blush, this is what they’re whispering about. I’m watching Kristin do sex.

Her thoughts were snapped when Kristin turned and moved toward the door. She found herself frozen with surprise, she couldn’t move. She was gonna get caught spying! Then her stepsister made a little turn, and sat daintily on the potty with that little secret grin on her face again.

With her will coming back to her, her heart descending from her throat, Mina considered leaving. Did she want to spy on Kristin while she piddled, or worse, pooped? It seemed disgusting, but again her wires got crossed, excitement and curiosity battling childish revulsion. She hadn’t thought Kristin touching her privates would be the thing that made her moan, so what might happen now? Besides, there was the naughty thrill of secretly watching her pretty stepsister do her most private things all unknowing. So she stayed put.

Kristin parted her legs went back to rubbing between them for a moment, then she bent forward and reached around back there, like she was wiping her bottom. Her eyes rolled shut and she groaned, deeper and more urgent than before. Her hand came away from behind, and she brought it up to her mouth and licked it. Mina shivered as she watched. After a few licks, Kristin reached back around, and this time she grunted and her hand stayed back there. She breathed really hard, grunting and moaning, her hips rocking on the toilet seat.

Then she arched her back, and her other hand snaked into the little opening between her belly and her thighs, and went back to rubbing her peepee. Kristin writhed on the potty, this was obviously giving her really strong feelings. Mina watched as her stepsister’s eyebrows shot up as if surprised, and her whole body shook, her butt bouncing on the seat. She slowed down, with this dreamy, relaxed look on her face.

After a minute or two she sat back up, her hand coming out from behind and she popped a finger into her mouth where she sucked it like a lollipop. Her other hand stayed between her legs, gently rubbing, almost tickling. Kristin squirmed a little, like she was waiting for something.

Suddenly she started to pee. Mina found this unexpected, after what had come before, something as normal as going potty. But Kristin’s hand didn’t come away, and Mina realized that her stepsister was peeing on her hand, on purpose. Eventually, she lifted her hand out of the stream ringing off the porcelain, but only to wipe it all over her tummy and breasts, up the side of her neck and all over her face. She kissed the pee-splashed fingers as they passed her mouth, her tongue came out and licked them sensuously.

Mina’s disgust had left her. Watching how much pleasure Kristin got from playing with her own pee, the exciting sight of her feeling her body in ways the 11-year old had never imagined, left her only filled with curiosity and eagerness.

But there was more to come. Kristin’s pee splattered to an end, and her hand darted right back down between her legs. The girl began to move, and Mina watched as she climbed up naked onto the seat, squatting, knees splayed, toes hanging over the edges, back braced against the tank. From this new position, the spying little girl could see the pink slit of her stepsister’s peepee, and how she was fingering it, for the first time. Mina began to fidget with unexplainable urges.

Kristin’s eyes squinched shut, and the muscles in her tummy clenched as her fingers moved faster and faster over her wet kitty. Mina recognized the slick noises from the night before. But then she saw below Kristin’s glistening slit and racing fingers, the knuckles of her other hand, that had reached back behind her. This arm started to move as fast as the hand over her pretty pink peepee, and her stepsister’s hips and thighs started to jerk, like she was trying to dance on the potty. Then suddenly Kristin’s whole body spasmed, her mouth open wide and the cries coming out, “Ah! Ah! Yeah! Oh, oh fuck! Ah!” Her convulsions calmed, and she hugged her knees on the potty, happily going, “Mmmmmmm,” and resting her sweaty face on her arm.

Mina watched her resting stepsister for a moment, and her hand found its way to her own peepee, tentatively squeezing it through her pajamas. The feeling was hot and gave her this knee-weakening melty sensation that ran all through her belly. It was scarily intense, something so good it was overwhelming. Was that what Kristin felt? What about the other things?

Kristin stood again, and this time Mina was ready to retreat, but her stepsister turned immediately away, and stepped over to the tub, sliding the glass door open. The 11-year old spy watched the reflection as Kristin started the shower, tested the water, and stepped gracefully in. She loved seeing the older girl soap herself slowly, savoring the feel of herself, and wished she could watch her every time she showered. Mina squeezed between her legs again, she couldn’t seem to help it. She wanted to feel it again. The rush was delicious, deeply gratifying, like eating fudge. And almost like a reward, Kristin started doing sex with herself again in the shower, her form mostly just a glowing silhouette under the heat lamp, in the steam, back arched and bottom lifted high, one hand dipping between her swaying thighs, the other reaching into the crack of her behind, both working busily while her head drooped under the steaming stream of water, panting and groaning.

With one last marvelous squeeze of her peepee, Mina shut the door, grinning. She already wondered if she would get to watch her again.

And just two nights later, Kristin was back in the bathroom, and Mina was squatting by the door, gently popping the lock and peeking in, so excited she was trembling. She found Kristin already on the potty, or maybe this was where she started tonight, maybe she did it different each time. Her beautiful stepsister stroked her fingers slowly, luxuriously, over her peepee, her legs spread as wide as she could get them. Mina could see that tantalizing hint of pink that made her quiver inside. Kristin’s eyes were half-closed, her head lolling, falling back and then drooping forward, short black hair brushing over her eyes and cheeks. Mina smiled with secret admiration for her pretty, sexy stepsister.

Then strangely, her head drooped forward and stopped. The hand between her legs froze. Her whole body went tense and Mina wondered what went wrong. She glanced down to where Kristin’s gaze would go, and with dawning horror, she saw a long slit of light along the bathroom floor, the light through the door, and her own shadow blocking some of it.

Oh no oh no, I left the bedroom light on! Mina had time to think before Kristin swung the door open, seized the little spy by her wrist, and pulled her sharply into the bathroom. Mina heard the door shut, and the lock click behind her.

*****

Mina’s green eyes were huge and mortified. She cringed back before her naked stepsister but was firmly in her grip. The 11-year old girl’s mouth stammered but no sound came out. As soon as the door was locked, Kristin wheeled on her, bending to get right in her face, her smudgy shadowed eyes glittering with anger. She looked so scary, out of control.

“What do you think you’re doing, you little sneak?” Kristin growled, keeping her voice low but practically spitting the words out. “You don’t follow me around enough every day, you have to spy on me here, too?” Still too frightened to speak, Mina shook her head ‘no’ so fervently that her honey blonde hair swished across her face.

“That is it. That is just fucking it.” And now Kristin dragged Mina into the amber-lit room, her little stepsister quailing. “I wait and I wait and all I wanted was a little privacy, just a little…” she trailed off for a second, then came back twice as enraged, “Is that it?! You wanted to see me naked? You wanted to see what I do with myself? Is that what you wanted, you little fucking slut? Goddammit!”

And Kristin sat back down on the toilet seat, and snarling, “Come here, you pervy little brat,” yanked Mina across her bare lap. “I’ll show you what happens when you spy. This is what happens!”

Kristin seized the waistband of Mina’s pajama bottoms and with one savage pull wrenched them down to the young girl’s knees, exposing her bare, helpless, upturned ass. Without reluctance or even much thought, the angry 15-year old gripped Mina by the back of her neck, forcing her head down and her butt up, and with her free hand spanked her stepsister, hard.

Mina gasped at the stinging shock of her stepsister’s open hand on her behind. It hurt! Her own hands shot out to cover herself, but after a quick tussle she couldn’t even see, much less resist, Kristin had both of Mina’s wrists in one hand and pinioned to her back, just below her shoulder blades, forcing her down just like before. And the next swat struck.

As she paddled, Kristin sped up, and barely heard herself saying, “You sneaking little bitch. You nosy slut, do you spy on me every time I take a piss? Whenever I shower? What is it with you? Can’t you leave me alone for two minutes? Will this make you stop?”

Mina squirmed desperately on Kristin’s lap, making little squeaks of alarm with each fresh spanking, but Kristin wouldn’t stop. And as the little girl’s butt turned pink from the harsh treatment, the slaps stopped stinging so much, and started feeling, well, more electric instead, sending out these hot sensations up her spine and down her legs. In fact, the whole spanking thing was getting her very confused. Tears were streaming down her face, but she wasn’t yelping any more, each smack of Kristin’s hand eliciting a soft groan instead, much more like the noises Kristin herself made in the bathroom. She was very aware of her sister’s naked body pressed all up against her, the warmth of it, the scent of it, even as she struggled.

Then, between spanks, Kristin hissed, “Are you gonna do this ever again, you dirty snooping slut?” And Mina found her voice. Cracking, squeaky, but still her voice crying out, “Nooooo…”

Hearing her stepsister’s humiliated cry, Kristin’s anger evaporated like steam, and her punishing hand stopped in midair, suspended. For the first time since she locked the door, she was actually seeing what she was doing, not just acting out. She heard the 11-year old’s sobbing, felt her breath along her leg. Hot pink handprints glowed on the girl’s otherwise pale ass cheeks, which looked even more creamy when compared to the satiny tanned skin on the other side of her panty line.

She noticed the stressed position of Mina’s elbows, and it almost surprised her to see her own hand pinning the girl’s wrists in place. She released them with a guilty quickness. Remarkably, Mina’s arms were slow to move, and even though she relaxed her elbows, she kept her hands together behind her back. Kristin began to realize that her little punished stepsister wasn’t jumping up, wasn’t rubbing her behind, wasn’t chewing her out, wasn’t even crying anymore. She was just lying there, submissive, breathing heavily.

And as Kristin’s senses returned completely, she caught a scent, sharp, tangy, and warm, rising from between Mina’s legs. She stooped her head just a bit closer, disbelieving, and inhaled. The earthy sweet smell of the 11-year old’s pussy was obvious and delicious, and Kristin’s brain immediately lit up with blazing arousal. This little girl wasn’t just scared; she was turned on!

Tentatively, the older girl brought her hand back down to Mina’s shapely little ass, touching it again, but gently, gently. Mina initially cringed, but as Kristin’s fingertips soothed over her tender bottom, she sighed, relaxed, sniffled. Kristin could feel the heat rising from Mina’s butt.

“I’m sorry, Mina,” she murmured. “But you made me so mad. You made this trouble for yourself.”

“I’m sorry too. I shouldn’t’ve spied,” Mina said. It was easier to confess when she didn’t have to look at Kristin. “I just, just couldn’t help it.”

“I locked the door. How’d you get it open?”

“I found a little tool, figured it out.”

“Why were you spying? What did you think you were going to see?”

“What I, you know… What you did the other night.”

“What?! You did this last time too?!”

“Please don’t be mad.”

Kristin thought back. She’d started getting up very late, starting last week, just so she could take care of herself, the almost unbearable urges that just kept building up in her body. And after such a long time of not being able to touch herself, it was totally horny and intense, she had to cum a bunch of times before she could even slow down, and even then, she wanted a couple more. And she was so pent-up, she did everything she thought would get her off harder, even the nasty, filthy things that she was too embarrassed to do most of the time. Did Mina see her doing that?

And now she was back for more? Kristin’s libido soared at the thought. But she needed to find out more, and keep Mina in her place while she did.

“I’ll be mad if I want to. You’re the one who was spying. Do you know how much trouble you’d be in if your mom or my dad found out?”

She practically felt the girl shrink with dread. “No don’t tell, please don’t tell,” she begged.

“Well, we’ll see,” Kristin said, her fingers brushing more thoughtfully over Mina’s cute little ass, straying just slightly into the groove of her crack, strokes widening to include the delectably soft flesh at the top of her thighs. “First, we have to figure out what you saw, so we know what you’re in trouble for.”

“I – I, I didn’t see that much.”

The 15-year old gave her stepsister one little swat, right where her butt joined her legs. Mina jumped, but Kristin went right back to the slow soothing caresses, and said, “Don’t lie, you little slut. If you didn’t see anything, you wouldn’t come back. Now, are you gonna confess, or do we go back to spanking?”

“I’ll tell, I’ll tell,” Mina said quickly. Then, trying desperately to get around her fear, she said, “I saw you naked, in the mirror. You were kind of posing, and you bent over and spread open your butt and looked at it. Then you started touching yourself all over. And then, I saw you do sex stuff.”

“Really. What kind of sex stuff did I do?”

“You know…”

“No. I. Don’t,” Kristin teased, punctuating each word with a light spank on Mina’s butt.

“Okay, okay. I saw you touch yourself between your legs when you stood in front of the mirror.”

“Where between my legs?” “On your… on your peepee.”

“Pussy, Mina, call it a pussy.”

“That’s a dirty word.”

“You’re a dirty girl.”

“So you were touching your, your pussy, and you were looking at yourself doing it.”

“And you were peeking at me the whole time,” Kristin said, and she felt a deep, hungry ache open all through her belly. She loved the thought of this. “Then what?”

“Then, you sat on the potty, and you rubbed your pussy more, harder. And you reached around, and I think you touched your butt, too.”

Kristin’s hand breezed over Mina’s ass. “You mean, like I’m touching yours?”

“No. That feels nice.”

“Oh, then you mean, like spanking?” she asked, giving her another teasing slap.

“No! No, it was like, you were rubbing it like you rubbed your pussy. Hard. I couldn’t see, but I think you were rubbing your butt hole. Like doing sex to it. Can you do sex to your butt?”

“I’ll ask the questions here. What happened next?”

“You rubbed both at the same time, and you got all wiggly with this crazy look on your face, and then you shivered all over and got kind of sweaty.”

“And you liked seeing me like that?”

“I don’t know.”

“Don’t lie.”

“No really, I don’t know. I don’t know how to call what I felt. I guess I felt, kind of crazy too?”

“Okay, that’s fair. At least you’re being honest. Did you keep peeking after that?”

“Yeah. I couldn’t help it.”

“What did you see me do?”

“You took your finger from your butt and put it in your mouth. You sucked on it. Was it really in your butt?”

“Questions,” Kristin warned, giving Mina another little slap. Then she rubbed the same spot, soothing it, and it was almost like her little stepsister’s ass was rising a little, trying to stay in contact with her hand. “Tell the rest.” “Well, then you… you peed on your hand, you peed and touched your pussy at the same time. And then you wiped your pee all over your tummy and put those fingers in your mouth, too.”

“Mmm, I did.” Kristin’s eyes closed, remembering that moment. Her free hand reached down and started stroking Mina’s hair, while she caressed her fingertips lingeringly up and down the groove of the 11-year old’s bottom. “What did I do next?”

“You got up on the potty, up on the seat, and then you rubbed your pussy really fast and you… you put your finger in your butt.”

“You saw my finger?”

“I saw your hand, you know, underneath you. And both your arms were moving, and then you wiggled really hard and went crazy again.”

“I had to, because it felt so good,” Kristin confided. “How did it make you feel? How did it make your body feel, watching me like that?”

“I got hot and shivery all over. And my peepee -”

“Pussy.”

“… My pussy felt all swollen and wet inside. When I squeezed it, it felt really good, but scary too, I don’t know.”

“You squeezed your pussy?”

“Yeah, a little.”

Kristin was thrilled. She never guessed that Mina might be playing with herself. That her interest in sex wasn’t just curiosity, that she might be feeling the same urges Kristin felt at that age. “Do you do that a lot?”

“I don’t think so. That was the first time.”

“So you just squeezed it that one time? Be honest.”

“No. I squeezed it again after you got in the shower.”

“You watched me shower after all that? Why?”

“You looked so, so, I don’t know, so beautiful in there, all naked and wet and it was like you were just a shadow. And then you started rubbing both places again, and you started moving and it was almost like you were dancing.”

Despite her arousal and simmering anger, Kristin felt flattered by this confession. “And you squeezed your pussy again, watching me?”

“Yeah, it made me want to.”

“Did it make you go crazy, like I went crazy?”

“Noooo, I didn’t do that. But that’s what was scary about it. I felt like if I kept going, I wouldn’t ever stop.”

“But you came back anyway, hoping you’d see me doing all that again?”

“Yeah, I guess so.”

“You guess so?”

“No.” Mina said firmly. “I know. I snuck out and spied on you because I wanted to see you naked again. I really, really wanted to. I love how pretty you are, and when you’re naked you’re super pretty and I get all these crazy feelings. I wanted to see you do all the sex stuff because it makes me feel strange and good and I don’t why it does. I don’t know about sex stuff at all, and you’re so grownup and you know all about it and I thought maybe I could figure some of it out. And yes, I was going to squeeze myself down there while I looked at you, ’cause that’s one of the best things I’ve ever felt, my peepee got all tingly just thinking about it.”

“Pussy.”

“Pussy, right. Sorry.”

Kristin nodded, and patted Mina’s bottom reassuringly. “Well, you’ve been really honest so far, so I don’t think I’ll have to tell mom and dad.”

“Thank you Kristin thank you thank you -”

“Not so fast,” Kristin said, a little petulantly, pushing Mina’s head back down. “I’m not done with you yet. I’m still a little mad that you spied. So you have to keep being honest, okay?”

“Okay, I promise.”

“Did you see me naked tonight before I caught you?”

“Yes. You were on the potty with your legs opened up.”

“Did it make you all wet in your pussy, when you saw me?”

“Yeah, but I was kinda wet already, when I was in bed, waiting for you.”

“Are you still wet down there, right now?”

She waited for an answer. Mina squirmed a little. Kristin stopped stroking her stepsister’s bottom. “Well?”

Mina sobbed out, “Yes. I’m sorry. I can’t help it.”

“How do you like it, the way I’m petting your butt?”

“It feels good. Soft and tingly. It doesn’t hurt anymore.”

“Do you still want to look at me naked, Mina?”

Again, the little girl was silent, desperately trying to think of answer that would get her out of trouble. It was either lie, or spy, and both of them were wrong.

“I asked you a question, Mina. Do you still want to look at me naked?”

The admission wrenched its way out of her, “Yes.”

Kristin patted the shapely ass before her one more time, then pulled up Mina’s pajama bottoms. She placed one hand on the girl’s thin hip and another up underneath her chin and lifted the girl up out of her lap. Mina clutched Kristin’s bare thigh right above her knee to support herself, and as the young girl’s head passed by, Kristin pulled her in close, nose in that fragrant blonde hair, and whispered, “Well, I’m right here.”

Mina got to her feet and wobbled a bit, shocked by what she’d just heard. Kristin stayed put on the toilet, sitting very primly, hands on her knees and knees together, back straight and tall, her bare boobies pushed together and out, jutting proudly. Her brown nipples were crinkly hard. She had that little, wicked grin on her face, and held Mina steadily in her gaze.

“You like me?” Kristin asked girlishly.

“You’re so pretty,” Mina replied, breathless.

“Go ahead and look, then. You don’t have to spy,” Kristin said, and used her hands to pull her knees, her thighs, her legs, slowly open. Mina’s eyes went straight to the juncture as she revealed herself. Then Kristin whispered, “I’ll show you everything.”

Mina blushed bright red. She felt dizzy, giddy. All she could do was stupidly nod.

“What was it you wanted to see me do when you were peeking on me, little slut?”

To Mina, a slut was someone who wore clothes that were too small. “You keep calling me that. Why?”

“A slut is someone who does naughty things, who wants to do naughty things even when they know they shouldn’t. Who feels really good from doing naughty things. Things like spying in the middle of the night. Like looking at people naked. Like getting all wet thinking about their sister.” Kristin slid her hands up the insides of her thighs while she said this, and she was getting so wet watching Mina’s thunderstruck arousal.

Her fingers came to rest on her black little bush. She pulled her knees up and parted her pussy lips so that Mina could see her. “I’m a slut. I love being a slut. Maybe you want to be a slut, too.”

Mina barely heard her, she was transfixed by Kristin’s pussy.

“What did you want to see, little slut?”

The 11-year old’s voice was tiny, timid. “I wanna see you rub your pussy.”

“Okay,” Kristin smiled, licked her lips, and slipped a finger into her soaking cleft, bringing the pad of a finger to her hard little clit. She rocked from the contact, “Aah.” This was so fucking hot. She let the rhythm of her need control her, humping the seat a little. She put one hand back to brace herself, so that Mina could keep looking.

Mina’s hand absently came up to her own bottom lip, fingertips stroking. She said, “Oh.”

“This is called masturbating, when you rub your pussy to make it feel good. I love the word. Say it for me.”

“Masturbating.”

A shudder went through Kristin. “Oh. Oh yeah. That’s nice. Say, ‘I like to masturbate.'”

Mina realized that her stepsister was getting more excited from hearing her talk. This made her knees shaky. She said a little more confidently, “I like to masturbate.”

“Yeah, yeah I do. Watch me, Mina.” She moved her hand, slipping two fingers deep into her vagina and leaving her thumb on her clit. The pleasure deep inside shot through her in waves. Mina had never seen a woman penetrate her own pussy, even though she knew that happened. She wondered how it felt. It was mesmerizing. Kristin saw her staring. “Say, ‘I want to watch my sister masturbate.”

“I want to watch my sister masturbate.”

“Oh fuck! Yeah. Yeah, say it again.”

“I want to watch my sister masturbate.”

Kristin knew she was close. Her eyes were shut, her body thrusting into her fingers, out of control and feeling nothing but her raw sexuality. “I’m a masturbating slut.”

“I’m a masturbating slut.”

“Unh! Oh, oh Mina, come closer, come closer.” The tension wound in her belly, so close, it was gonna be so hard. Mina edged closer, wanting to see it all, wanting to be near Kristin, but terribly intimidated by the force of her feelings, her nudity, her masturbation.

Kristin applied that last bit of pressure. “Watch me, watch me,” and then she orgasmed, and it was stronger and better than she could have imagined. For a full minute, her head emptied and her body did nothing but wrap itself around the incredible pleasure she gave it.

It was even crazier up close than when she peeked. And knowing that Kristin wanted her here, watching her, gave Mina a feeling she couldn’t describe, like her whole body was humming, but especially down there. Her pajama bottoms were damp, she could feel it. She loved being so close to her stepsister. Mina could feel the heat coming off her, see the sheen of sweat and even smell it, steamy and salty like the ocean. And she could smell something else, something heavy and kind of musky, and she knew with a shiver it was Kristin’s smell, the smell of her pussy, the smell of sex.

Kristin set her feet down and scrubbed a hand through her short black hair, coming back to herself. She opened her eyes to find her stepsister right there, but this time she didn’t care. She looked into those huge, marveling green eyes and asked, “Did you like that?”

“Uh-huh. I feel so funny when you get that way.”

“What happens to me is called cumming, and it’s the best feeling you can get. I love cumming, and I need to make myself cum to be happy.”

“Cumming.”

“Yeah. It sounds good when you say it.”

“So you were cumming just then?”

Kristin smiled. “Oh, yeah.”

“But…”

“But what?”

“But you didn’t rub back there,” Mina said, pointing helpfully at her own ass. “Before, you did it there, and then you were cumming from there.”

Kristin leaned forward, elbows on knees, smirking as she considered Mina. The purring in her pussy ramped right back up into urgency, and her asshole tingled maddeningly, suddenly feeling neglected and hungry. “You are a pervy little slut. You want to see me do that?”

“It seems really grownup. I don’t know how you could do it.”

“You want to try it yourself, like when you squeezed your pussy?”

“I don’t know. Is that gross?”

“Gross? Gross how?”

She shrugs. “Isn’t it stinky?”

“Your poop might stink, but if you wipe and wash, your ass doesn’t.”

“Really?”

Kristin reached out and grabbed the waistband of Mina’s jammies, pulling them away from her back. “Find out.” Mina stared at Kristin, shocked.

“Go ahead, take a finger and slide it up and down the crack of your butt.”

Hesitatingly, the young girl reached back and did as she was told, her hand slipping inside the invitingly opened pajamas. The slight sweatiness in the soft, tight groove between her warm cheeks allowed her finger to slide easily. After the spanking and the stroking, that whole area was super tender, and the sensations she got were unexpectedly pleasurable, ticklish and luscious.

Kristin watched the expressions pass across Mina’s face and smiled, knowing. “Be sure to touch your butt hole. Rub around real good.”

Mina was happy to obey. Touching the pad of her finger to her tight, wrinkly hole sent a feeling right up her spine and made her pussy feel even more melty. She didn’t understand and didn’t care. She rubbed and explored thoroughly, even pushing against her butt hole and feeling the rubbery orifice yield. And she thought, yes, you could stick your finger up there. You might even like it.

Kristin glanced back at Mina’s busy hand, and then caught her eye. Mina giggled a little breathlessly, embarrassed but obviously enjoying herself. Kristin nodded encouragingly. “It feels good, right?”

“Yeah.”

“Okay, enough fooling around. Pull your finger out.”

A little disappointed, Mina did it, holding the finger gingerly away from herself as she felt her pajamas snap back into place. She looked to Kristin expectantly.

“Put it under your nose and sniff it. Tell me what you smell.”

Doubtfully, Mina brought the finger up to the bow of her upper lip and inhaled. Her fears turned out to be unfounded. She smelled the mild warm fragrance of her own ass on her finger again. “Well? Is it stinky?”

“No. It’s not strong. Natural, like bark or something. Even, I don’t know, a little sweet.”

“Not so bad.”

“Un-uh, I kinda,” she sniffed again, “I kinda like it.”

“Me too,” Kristin said, and she reached out and drew Mina’s hand away from her nose and toward her own face. Mina thought she wanted to smell it too, but Kristin put Mina’s finger in her mouth, wrapped her soft lips around it, and sucked. Mina felt her stepsister’s tongue massaging it, and all the while Kristin kept her eyes wide and locked on the 11-year old. Mina gasped.

Kristin drew the wet finger back out. “I’ll do it for you, Mina. I’ll show you how I masturbate my ass. I’ll get off for you, and I’m sure I’ll love it.”

“Yeah?” Mina’s eyes sparkled.

“Yeah,” Kristin replied. “But you have to do something for me first. I get to watch you.”

The girl suddenly shied up. “Watch me do what?”

Continue on to Part Two

 

No comments on Sexy Stepsister Spy, Part One

  1. Jen Lee says:

    WONDERFUL beginning – looking forward to the next chapter. So glad I found this new site! Lix from Jen

  2. eloquent delinquent says:

    I’m happy you’re enjoying it! Thanks for telling me!

  3. Moses says:

    Cannot wait to read the rest!

    You paint wonderful pictures. You’re a natural match for this site.

    I’m going through withdrawl since Scouting for Girls stopped in mid-story with the apparent demise of leslita. I do hope you’ll bring it over here and add to it. You have the start of a wonderfully erotic story.

    M

  4. Tim says:

    My goodness what a wonderfully erotic story.
    The description of Kristin’s need to satisfy her sexual urges, ever growing, and then the discovery and eventual participation of her step sister was so, so sexy and arousing.
    I’m so pleased I discovered this site, and even more so to discover your writing.

    Now on to chapter 2!!!

  5. Drod says:

    This story need more chapters. 🙂

  6. kim says:

    Wow! How did I ever miss this story?! It pushed our buttons real well. Going to the next chapter for our big come. Thanks E D, great pic too. hugs, Kim and Sue

  7. Kat says:

    Eloquent delinquent where have you gone? I love your stories! I’ve read all the ones here… are you writing any new ones?

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