2 comments/ 101761 views/ 15 favorites Sorority Pt. 01 By: toocold Warning: this story is a fantasy and details sexual behaviour that is, at best ill-advised. But it is pretend, so so long as you aren't a doofus, you should be ok. All sex-acts described are within ages of consent in the country it's written in (England, for the record). I'll try to keep the parts and the action coming! * 19-year old Natalie considered simply rolling on top of her 23-year old step-sister and starting to kiss her, reasoning that Penny had started it with her discreet fondling. However, she really wanted some serious sexual satisfaction, and there was the risk that Penny would be scared off by her aggressive needs. Then, as another need arose in her, a new plan hatched. Carefully snuggling alongside the dark-haired girl, Natalie lay on her side, her front against Penny, so her hot pussy was pressed against Penny's hip. Penny stirred slightly, and her brow furrowed as she was awoken by the closeness of Natalie. This was ideal for the younger girl. She closed her eyes, held her breath and relaxed fully. Almost immediately, she began to pee (thinking nothing of Hannah's sheets!). The warm, yellow fluid fanned out across her inner thigh and trickled down the crease between her thigh and bottom, pooling beneath her in a spreading damp patch. Her piss soaked her pyjamas and, as planned, from the contact of her pussy and the pool she was laying in, began to soak Penny too. As soon as she felt the warm wetness under her bottom, Penny came fully awake. She was momentarily confused, then realised what was happening -- Natalie was wetting the bed. Sitting up, she touched Nat's shoulder to wake her and opened her mouth to speak. However, before she could draw breath to say a word, Natalie's eyes opened wide and she seized the older girl around the back of the neck, pulling her down to her face where she kissed her full on the lips, aggressively, sexily, her tongue pushing into Penny's mouth. At the same time, Natalie rolled on top of Penny, pushing her back onto the bed, and still pissing, so that her step-sister was as thoroughly soaked with warm pee as Natalie was. Penny squirmed under the curvier girl, trying to break the kiss. Her mind was whirling and her heart pounding. Natalie was grinding against her and Penny was all too aware that despite this incredible situation, despite the shock she was in, she was more turned on than ever. Natalie's heavy breasts were a thrilling pressure where they pressed against her own, smaller tits. Her young sister's tongue and lips were locked in a passionate kiss with her own. And, although she knew she should have been disgusted, something about Natalie deliberately wetting the bed, deliberately pissing on her, was making Penny's pussy ache with desire. It was Natalie that broke the kiss, and lifted herself onto her elbows, looking down at her step-sister with shining eyes. Licking her own lips seductively, she ground her piss-wet crotch against Penny's as she stared at her. "Natalie, what...what..." Penny could not form a coherent thought. This was so, so wrong. She'd grown up with Natalie, as sisters, and now they were in a piss-wet bed together, and Penny was acutely aware that her step-sisters pee wasn't the only reason that she was wet between her slender thighs. "I was awake, Pen. When you were playing with my boobs and bringing yourself off. I was awake the whole time." "I...no..." There was nothing Penny could say. Her cheeks were flushed with shame and she was beyond confused now. Nat grinned wickedly, and kissed her stunned step-sister again. "It's ok, Pen, I won't tell anyone that you touched me up when you thought I was asleep. That you groped my boobs and touched yourself." Hot shame brought tears to Penny's eyes, but her nipples were so hard they felt sore, and she desperately wanted to touch herself again. "I won't tell, so long as you take the blame with Hannah for the wet bed. Do that, and I'll keep your dirty, lesbian secret." Before Penny could respond, Natalie suddenly rolled off her, turned her back and snuggled down into her pillow, happily nestling down to sleep in the pissy sheets. Penny lay still, stunned. Her sense of guilt overwhelmed her ability to think clearly. Natalie had wet the bed on purpose, had done it on her, and had seemed to enjoy kissing and rubbing on her step-sister. On the other hand, Penny had started it, stroking her younger step-sister without consent and touching her pussy whilst thinking about having sex with her. But now Natalie was blackmailing her, asking her to face the embarrassment of telling Hannah that at 23-years of age she'd peed herself like a child. What should she do? * * * Three hours later the washing machine rumbled in the kitchen, Hannah sat in the living room drinking a cup of tea and looking irritated and Penny sat on the edge of the tub in the bathroom dressed in a towelling robe, looking downcast. Hannah had been exasperated and annoyed when Penny had told her what 'she'd' done, and Natalie had acted suitably aggrieved, making a great show of throwing back the duvet to show the large, wet spot, and moaning indignantly that her pyjamas now smelled of pee. Penny had simply stayed shamefaced throughout and had finally retreated to the bathroom. Natalie slipped into the bathroom, closing the door behind her. Penny looked up at her and frowned, but there was no anger in her. "Nat, look, what happened...what I did..." "It's okay, Pen," said Natalie gently, walking up to her disconsolate step-sister. Even depressed and confused, Penny couldn't help but ogle the younger girl, tumbled or red hair, large, firm boobs under a cotton shirt, and curvy hips and thighs in a short, pleated, plaid skirt. "It was mean of me to do what I did, too. And to make you take the blame. I'm sorry." Standing in front of Penny, Natalie offered her hand and drew the dark-haired girl to her feet so they stood facing each other. "Besides," she continued, "I enjoyed it." Giving Penny no chance to reply, Natalie kissed her, pressing her soft lips against her step-sister's. Penny initially stiffened in shock, but as Natalie stepped closer and ran her hands across Penny's hips and then down, behind, to cup and squeeze Penny's bottom, she relaxed, and returned the kiss, reaching up to caress Nat's heavy breasts. They continued to kiss with increasing passion, until Natalie broke the lip-lock. Her eyes were ablaze with desire. She put a finger to her lips to indicate that Penny should be quiet, and then dropped to her knees, loosening the belt of Penny's robe and then opening it, leaving her step-sister's pert breasts and hot pussy, topped with a neat triangle of dark hair, exposed. "Nat, no..." Penny began, but this turned to a choked hiss of joy when Natalie dipped her head and ran her tongue up the length of Penny's slit. Natalie stroked her hands up Penny's legs to again hold and fondle her older sister's bottom cheeks which were full and soft, giving a great curve to her slim frame. At the same time, she licked and kissed at Penny's pussy, alternating between teasing licks and then harder pressure at the top, the touch sending shockwaves of pleasure through Penny's whole being. Natalie continued to lick and tease, nibbling and sucking at her step-sister's pussy lips and tonguing her clit, whilst kneading and squeezing at her fleshy ass, her middle finger of her right hand occasionally brushing at Pen's puckered anus. Penny was doing her best to stay silent, but as she looked down to see her ginger sister licking at her pussy and felt the increasingly insistent finger pushing at the tight hole between her bottom cheeks, she whimpered. Biting on her left fist to stifle any more noise, she took hold of her own breasts, clutching and tweaking her nipples as Natalie continued to lap at her cunt. Penny's resolve was tested further as Natalie pushed her tongue between Penny's lips, tasting the sweet flavour of her step-sister's pussy, thrusting her tongue in and out, fucking her with her mouth. Breaking off for a second, Natalie sucked the fingers of her right hand, coating them with spit, before returning to Penny's slit, licking and sucking at her clit. Penny could feel her orgasm building, so much stronger than the one she'd had last night, and the sordid lust she felt at being licked out by her teenage step-sister was alone enough to tip her over the edge. So when she felt Natalie's fingers again on her bottom, her saliva covered fingers leaving a wet trace towards her rosebud, she knew what was coming next and didn't care. Carefully, Nat worked her middle finger around Penny's hole, before gently, slowly, pressing her finger into Penny's asshole. Penny was panting and shivering now, still trying to be silent but overwhelmed by the feelings of her sister's tongue in her pussy and her finger gently thrusting in and out of her anus. Sensing that the end was near, Natalie began to lick press at Penny's clit, and worked a second finger into her arse. The feel of her arsehole stretching was the final straw, and Penny came, grinding her hips into Natalie's face and biting hard enough on her fingers to make her cry as she stifled the screams that she wanted to release. Natalie continued to suck at her step-sisters cunt as she came, and didn't stop until Penny had stopped bucking and shivering, also slipping her fingers from Penny's arse. The busty girl stood, and again kissed Pen full on the lips, letting the dark-haired girl taste her own pussy juices on her sister's lips and tongue. Natalie then took a step back, looked wickedly at Penny, and slowly, deliberately, sucked deeply on the fingers of her right hand, the fingers that had been up Penny's bottom. "So," Natalie asked cheekily, "am I forgiven?" To be continued... Sorority Pt. 02 Warning: this story is a fantasy and details sexual behaviour that is, at best ill-advised. But it is pretend, so so long as you aren't a doofus, you should be ok. All sex-acts described are within ages of consent in the country it's written in (England, for the record). I'll try to keep the parts and the action coming! * "I'm going out -- try not to behave like a toddler whilst I'm gone!" Penny winced at Hannah's sarcasm, but she could understand her older sister's mocking -- no 23-year old should be wetting the bed. Of course, what Hannah, 25, did not know, was that Penny hadn't wet the bed -- it had been Natalie, their 19-year old step-sister. But Penny couldn't tell or Natalie would reveal that Penny had groped her boobs whilst masturbating during the night. Of course, Penny could then reveal that Natalie had since licked her pussy whilst fingering her arsehole, but she hardly wanted to discuss that with her older sister! Penny was still just wearing her robe, her sleek, dark hair tied loosely back. She walked through to the kitchen where Nat was making a coffee. She smiled as Penny walked in. "Hey, you want a drink?" she asked. Penny shook her head. "Look, Natalie, what happened upstairs..." Penny's words were silenced by the soft lips of her younger sister as she embraced her, kissing her full on the mouth whilst slipping her hands down her back to cup her bottom. Penny knew she should pull away but her body again betrayed her, and she pressed against Natalie, returning her kiss with a passion. The dark-haired girl gasped as Natalie broke the kiss, only to start to kiss her way down Penny's slender neck, pulling her robe open to expose her pert, C-cup boobs. As Natalie's lips and tongue trailed across Penny's nipples, the older girl suddenly seemed to realise that they were standing in the middle of the kitchen. Taking a quick step back, she clutched her robe closed. "No, Nat, this is wrong! This is bad!" she said, urgently. "Bad?" Natalie pouted. "Felt good to me." She stepped forward, intending to renew the embrace, but Penny pushed her away. "No! For fuck's sake, you're my sister -- we can't do this." "Why not? You liked it -- I know you did, or you'd have told Hannah that it was me that wet the bed. You liked being bad with me." Natalie's expression was salacious, and Penny could feel a totally undeniable heat between her legs. "No, Nat, no." This time there was a lot less conviction in Penny's voice. "Well, if we were bad, then it was mostly me," stated Natalie with a smirk. "Sure, you started it, but I wet the bed and then made you take the blame, plus I licked your pussy. So it is me that's been bad. Maybe...maybe you should punish me?" "Pun...what? Nat, what're you on about?" "Come on, Penny -- you said we were bad, but I was the really naughty one. All you did was touch your sister's boobs, but I was much worse. So punish me." "But...I...I mean, how? What are you talking about?" Natalie grinned. "You know -- don't you think I should be spanked?" "Spanked?! No! Where do you get that from -- we were never spanked, Natalie!" Natalie gave her older sister an arch look. "Well, you can hardly stop my allowance or ground me. And if you send me to the naughty step I'll wet myself!" Penny gasped. Seizing the moment, Natalie took Penny's hand and pulled her through to the lounge. The front window looked out on a private garden so, unlike the kitchen, they were not overlooked. Natalie guided Penny to a stunned sitting position on the edge of the couch, then turned her back on her. Slowly, the voluptuous teenager raised her short skirt to present her step-sister with a view of her peachy bottom and her stretched, pink gingham cotton briefs. "There, now, don't you want to spank it?" Penny wanted to say no, but was overwhelmed by her sexual desire for her sister and was swept up by the younger girl's seemingly very kinky side. "Do...do you want me to?" she stammered. Natalie took this as a sign of progress and, before Penny could react, lay across her sister's lap, presenting her round bottom cheeks to her. "Do it, Pen, spank me!" "I've never...I just...Nat, this is too weird!" "Come on, I deserve it! Do it!" The result of Natalie's urging was a light slap, barely more than a pat. "Not like that -- hard!" Biting her lower lip, Penny tried again, and delivered a spank that wobbled Natalie's fleshy cheeks. Nat smiled, but Penny couldn't see that. "That's it, sis, but harder. You're punishing me, remember?" "I don't want to hurt you, Nat" said Penny, gently. "You should do -- you're punishing me, punishing my bottom. I want it to hurt. I want you to make me cry." Penny gathered her resolve, drew back her arm and delivered a hard smack to Natalie's bottom, briefly leaving a faint handprint on the fat cheek. "That's it, like that but harder" whispered Nat. Penny did, bringing her palm down sharply three times , alternating so that both her sister's creamy, white bottom cheeks now had a pink blush blooming on them. "Yes", Natalie gasped, "punish me." Penny felt like she was in a trance, felt like she was watching herself on TV. She saw her arm repeatedly rise and fall, saw her hand spank hard across her sister's bottom, vaguely felt the sting in her own palm as she beat a steady rhythm on Natalie's posterior: Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! Spank! For her part, Natalie was thrilled. She'd been wanting a good hiding for a while, and Penny was making a pretty good job of making her bottom sting. Every slap sent a thrill to her cunt and the nipples of her pillowy, F-cup boobs were painfully hard. The spanking continued, with Penny mesmerised by the reddening, bouncing bottom across her lap. Her hand was really starting to feel sore, though not nearly as sore as the hot bottom over her lap. She'd never been spanked, never given a spanking, but she knew what it involved, and had seen enough 'novelty' sex shop items to have an idea that would stop her hand hurting. She paused, grabbed Natalie's calf and lifted her leg to pull off the slip-on pump she was wearing. Natalie was delighted at this initiative, but said nothing, just wriggled impatiently and raised her bottom, offering it up in a brazen way for more punishment. Penny looked at the shoe's sole -- hard rubber, before gripping it and bringing it down hard on Natalie's cheeks. The impact was considerable, and hot pain spread across the ginger girl's buttocks. This was far harder than the hand spanking. This was exactly what she wanted. Seeing Natalie's reaction, Penny continued to lay into her sister's bottom with the pump, the flat, dull spanking sound filling the room as she smacked and smacked the wobbling, rosy bottom. Presently, she heard what she'd been waiting for, as Natalie gave a broken sob and started to cry, the burning, fat ball that was her bottom finally reducing her to tears. Undeterred, Penny actually redoubled her efforts, alternating with three hard spanks to each cheek, from the very top that was covered by Natalie's gingham panties, working all around the hot, round buttocks, and administering hard spanks to the top of her thighs. "Wanted a spanking, did you?" Penny suddenly asked, getting into dominant character and deciding to scold her younger step-sister as she spanked her bottom for her."Thought it was ok to wet the bed?" SPANK! SPANK! SPANK! SPANK! "To Wet the bed and blame me?" SPANK! SPANK! SPANK! SPANK! "And then kiss me, and...and lick me?" SPANK! SPANK! SPANK! SPANK! "And then ask to be punished?" SPANK! SPANK! SPANK! SPANK! Natalie was now crying fully, squealing at the hardest smacks of the shoe on her tender bottom and wriggling and kicking her legs weakly, but she made no attempt to escape the punishment that rained down on her buttocks. It was Penny who stopped, realising that she was panting and her arm was tired, and seeming to notice for the first time the angry, burning red that she had turned her sister's bottom. Dropping the shoe, she bent forward and pressed her lips against Nat's bottom, amazed at how hot the cheeks felt -- she could feel their heat an inch from the surface. Natalie was still sobbing, but shifted her body so that Penny could more easily kiss and lick at her swollen bottom. Penny touched the gusset of Natalie's gingham knickers and found it to be soaking -- there was no denying how turned on Natalie was by the spanking. But Penny could feel her own heat, and knew she felt the same. Pulling the crying girl to her feet, Penny also stood and grabbed her, grinding her body against her, kissing the tears from her face, one hand gripping and stroking Natalie's massive boobs, the other, gently squeezing her hot, well-punished bottom. Natalie returned the kisses, more turned on than she'd ever been in her sordid sexual life -- she'd done way kinkier things than kiss a girl and get a spanking, but not with a member of her family. "Let's go back to bed," Natalie suggested breathlessly. The two girls hurried upstairs and, moments later, fell back onto the mattress. Hannah had stripped and washed the pissy sheets but had no idea what to do with the mattress which was still damp and smelled of Natalie's pee. Penny had dropped her robe, and Nat had quickly stripped all her clothes except her knickers. Penny lay back, feeling but not caring that she was laying where Natalie had pissed, and for the second time today she felt her step-sister's tongue at her pussy. This time Natalie quickly pushed three fingers of her right hand inside Penny's already sopping cunt, working them in and out whilst her tongue pressed and flicked over her dark-haired sister's clit. Remembering what had triggered the 23-year old's orgasm that morning, Natalie used her left hand to finger Penny's cunt, moving her right, fingers coated with pussy juice, to Penny's arsehole. Gently, she pressed two fingers to Penny's rosebud, which opened to allow the intrusion. The sensation of Natalie tonguing her clit whilst also sliding fingers in and out of her pussy and bottom was more than Penny could take, and her muscles locked rigid as she had the most powerful orgasm of her life, moaning aloud as tears of pure pleasure rolled down her cheeks. Natalie kept the licking and fingering going until Penny's orgasm had subsided, then moved up the bed to lay alongside her sister, kissing her lips so that Penny could taste her own cunt, and placing penny's hands onto her bottom, still hot from the hard spanking she'd asked for. Penny instinctively cupped Nat's cheeks, thrilling to the soft, hot weight of her sister's bum. As they lay in each other's arms, Natalie murmured a partial confession. She told Penny about some of the boys and some of the girls that she'd slept with, told her about how much she enjoyed being spanked and humiliated, told her about some of the gang bangs. She left out the fact that she'd worked as an escort, and left out...something she planned o show her. Penny was shocked and thrilled. She was stunned at what a slut her younger sister turned out to be, but could not deny that she was turned on by her liberated view of sex. And, besides, Penny had to remember that she'd started this -- she'd made the first move on her step-sister, at a time when she thought the 19-year old was a cheerful naïf. "There's other stuff, too," Natalie began, looking into Penny's eyes. Both girls were so engrossed in each other, that they didn't know they were observed. Hannah had returned home and was now staring, baffled, at the scene in front of her -- her sisters, one nude, one just in panties, laying, cuddling, kissing, on a piss-damp mattress, and Penny was stroking and fondling what looked to Hannah like a well-spanked bottom. At 25, with raven hair and D-cup breasts, Hannah was no stranger to sex but she could hardly comprehend that her sisters were having some sort of incestuous, lesbian sex. However, she did not reveal herself, standing silently and watching them through the crack in the door. She heard Natalie's confession, and waited to see what came next. To be continued... Sorority Pt. 03 Warning: this story is a fantasy and details sexual behaviour that is, at best ill-advised. But it is pretend, so so long as you aren't a doofus, you should be ok. All sex-acts described are within ages of consent in the country it's written in (England, for the record). I'll try to keep the parts and the action coming! * "Other stuff?" asked 23-year old Penny, enjoying the sensation of cuddling her almost nude step-sister, her firm, C-cup boobs squashed against Natalie's F-cup tits, whilst her hands stroked the 19-year old's recently spanked bottom. Unbeknown to the girls, their older sister, Hannah, 25, was standing observing them. "Yeah...other stuff," Natalie almost whispered, snuggling against the dark-haired girl. "When I wet the bed last night, I did it on purpose." Hannah's ears pricked up at this -- Penny had claimed that she was the one who had pissed in the bed. "And I do that a lot -- I love to wet my knickers and the bed, especially if I could get caught. It just turns me on." "I was shocked, at first," began Penny. "But, when you left me laying their after you peed on me, I was...I was really excited too." Natalie smiled. "I want to, to...just, keep holding me." Penny frowned, wondering what Natalie meant, but hugged her step-sister closer, cupping and squeezing her round, spanked bottom. Penny felt Natalie tense up. The ginger girl had her eyes closed and looked to be concentrating. As a sob escaped her, Penny felt a wetness on her pussy and realised that Natalie was again pissing on her, but she made no move to stop her, her nipples hardening in excitement as she lay in bed being pissed on by her sister for the second time in 12 hours. Natalie bit her lower lip and screwed up her forehead. The flow of hot wee stopped, and Penny was about to tell her to carry on when she felt Natalie tense up again and, suddenly, she was simultaneously aware of three things -- a bad smell, a soft, crackling sound and a bulge forming in Natalie's panties, under her hands. Natalie was shitting herself! Hannah had to bite on her fist to stop herself from making a sound as she spied on her sisters. She'd heard Natalie's confession to enjoying wetting herself with disbelief and a thrill -- going to the toilet in her knickers was one of Hannah's secret pleasures. As she watched Natalie piss over Penny, Hannah could feel her own nipples hardening, her D-cup breasts responding to the shock of what she was seeing. And then it got better. Hannah could not believe her eyes as the back of Natalie's piss-wet briefs tented out and filled with a large, soft turd. Not only that, but instead of recoiling in horror, Penny seemed ok with this development, and kept stroking and cupping Nat's bottom, even as a second piece of poo joined the first, smearing brown fudge over Natalie's pink cheeks. Hannah slipped a hand into her jeans and began to gently stroke herself as she watched. Natalie had been almost paralysed with tension as the first thick turd pushed out into her knickers. She figured she had enough blackmail material on Penny to keep her quiet if she was disgusted and ran screaming from the room, but she wanted her step-sister to share this with her too. When she felt Penny's fingers still tentatively cup her cheeks as her panties filled with poo, she was emboldened and relieved to relaxed a little and let a second piece of dirt out. She felt Penny press slightly against her stained panty pouch, spreading the shit over Natalie's spanked ass. Thrilled by this mute acceptance, Natalie opened her eyes and kissed Penny full on the lips. Her older step-sister returned the kiss with passion, and Natalie relaxed fully, dribbling more piss into her stained gusset to soak through against Penny's pussy, and finishing the dump she was taking in her panties. Penny had been stunned by what was happening. The fresh flow of piss had felt so exciting as it bubbled through Nat's panties and ran over the lips of her cunt, and she'd been about to suggest licking Nat again when the poo started. At first she was too shocked to say or do anything, but by the time the second lump started to squeeze out her heart-rate had stabilised and she realised that she was so turned on that she thought she might explode. She knew this was disgusting and weird behaviour, but the heat between her legs told her that she didn't care. She ran her hands across the foul bulge in Natalie's panties, testing the firmness and gently squashing, feeling the hot, soft poo smear across Natalie's hot, soft cheeks. She returned Natalie's kiss hungrily, and was delighted to feel the bulge in her step-sister's panties grow, as Natalie squeezed out a third and final turd, this one the largest of the three. It filled the whole back of her panties and, thanks to Penny's gently kneading fingers, squashed down between her legs to touch her pussy lips. Penny was less gentle now, mashing the shit against Natalie's bottom and kneading the back of her knickers, whist grinding her pussy against her step-sister's. "You're so dirty," she whispered, between kisses. As the poo squeezed out of the elastic around Natalie's cheeks, Penny realised she was getting the slimy, brown mess on her hands too. Hannah's hand was a frantic presence between her legs, her panties so wet with her juices that she may as well have wet herself too. She was utterly transfixed by the actions of her sisters and the filthy, lesbian sex they were engaged in. She was torn between revealing herself and seeing if they minded her joining in and staying where she was to see how it played out. However, she was more forceful than the younger girls and Natalie already looked like she'd been spanked -- Hannah quite liked the idea of dominating her sisters and forcing them to let her join in. The thought almost triggered her orgasm. Natalie felt like she was in heaven. She'd been soundly spanked and was now in bed with her step-sister, both slippery with piss, her panties full of shit, her tongue in Penny's mouth. She was so horny that she was prepared to do almost literally anything. She could feel the sticky poo smudged all over her cheeks and smeared against the bottom of her pussy and knew that her panties were ruined. "Can you go, Pen?" she asked. "What?" "Do you need the toilet at all?" Penny paused, then nodded. Natalie broke their embrace and rolled on her back, loving the shifting weight of the mass in her knickers and caring not a bit about the mess they were making in Hannah's spare room. She shoved one hand down the front of her panties and started to finger herself, her palm pressing her clit, whilst her other hand started to roughly twist her nipples and maul her huge, soft tits. "Do it on me!" she implored. Penny bit her lip, but swiftly made up her mind, and straddled Natalie. She too began to play with the ginger girl's tits, accidentally leaving streaks of shit on them from where she'd been cupping Natalie's dirty bottom. The sight of this drove both girls wild (and Hannah too, not that they knew) and Penny pressed her cunt against Nat's face, grinding as Nat immediately started to lick her. As soon as she felt her sister's tongue in her pussy, Penny let go. A hot stream of piss bubbled out of her and blasted straight into Natalie's face, filling her welcome mouth, splashing over her pretty features and streaming down her shit-smeared body. She tried to swallow Penny's piss whilst still licking and sucking at her pussy and fingering herself. Both girls were moaning and grunting, slaves to their passion and the whole dirty carry on was too much. They came almost simultaneously, moaning and sobbing, Penny with her pissy cunt against Natalie's mouth, Natalie with shit on her boobs and four fingers deep in her pussy. They were joined in their orgasm by a wide-eyed Hannah, who bit painfully on her fist as she came, not wanting to betray her presence. She'd decided that she didn't want to let on that she'd seen the girls as a plan formed -- a plan that allowed Hannah to indulge in her sickest fantasies, just as her sisters had. To be continued... Sorority Pt. 04 Warning: this story is a fantasy and details sexual behaviour that is, at best ill-advised. But it is pretend, so so long as you aren't a doofus, you should be ok. All sex-acts described are within ages of consent in the country it's written in (England, for the record). I'll try to keep the parts and the action coming! * After watching her 23-year old sister, Penny, and her 19-year old step-sister, Natalie, engage in depraved, lesbian sex acts, 25-year old Hannah had been waiting for an opportunity to get in on the action. From what she'd already witnessed she knew they were having sex with each other, and she'd already seen Natalie poo her knickers and pee on Penny and Penny piss in Natalie's mouth. She also suspected that Natalie had taken a hard spanking and that whichever of them had wet her guest bed (allegedly Penny but now she had no idea) had done it intentionally. Hannah loved using her panties as a toilet but could not believe her sisters did too. She was also quite dominant, so was enthralled by the idea of Natalie getting spanked. However, Penny's full bottom was also a target she desired! A whole day passed before she had an opportunity to insert herself into their relationship. Natalie had gone to the shops, and Penny and Hannah were surfing the channels after lunch when Penny said she was going to nip to the loo. Giving her barely a second, Hannah followed her up the stairs, admiring her ass as she went. The sisters were of similar build -- both slender with black hair -- but Hannah's D-cup breasts were a little larger than Penny's, though Penny had the curvier bottom. They were often thought to be twins, and dressed in a similar style -- today both were in leggings with a tank top, comfy clothes for relaxing at home. At the top of the stairs, as Penny pushed open the bathroom door, Hannah stopped her with a hand on her shoulder, and firmly turned penny and pushed her back against the wall. "Han, what the hell?" questioned Penny, understandably confused. "I want a word with you, Pen," said the older sister, intently. "There's something we need to discuss." "Can't this wait? I need the loo, Hannah." "No, it can't wait. In fact, given that you wet my bed two nights ago, I can't believe you'd get shirty with me about the right time to go to the loo." Penny blushed deeply. "And, of course, there's what I saw yesterday..." At these words, Penny's look of shame was replaced by a mixture of shock and fear. She opened her mouth, but no words came out. Her mind whirled -- Hannah had seen her in bed with Natalie? That meant she'd seen them doing...oh God! She wanted to die. She wanted to run. She wanted, very much, to go to the toilet. "What I saw made me cross, Penny." Hannah glared. "What I saw shocked me, Penny," added Hannah, staring intensely at her sister and talking a half-step closer, so close their breasts were almost touching. "What I saw left me speechless." She put both hands on her sister's shoulders. "And, more than anything, what I saw made me very, very horny!" Before the light of understanding could reach Penny's eyes, Hannah kissed her full on the mouth -- not a familial, sisterly kiss, but a passionate kiss, her tongue pushing against her young sister's teeth and exploring her mouth. She also moved her hands, her left molding Penny's boobs, tweaking at her nipples through the material of her bra and vest, the other hand grabbing at her bottom, stroking the full cheeks and tracing the outline of her briefs through the leggings. Hannah broke the kiss. "It made me cross that I wasn't involved, you dirty little girls!" Her eyes were smoky with lust now. "I...Han...I, I need..." "Sssh. No more 'I need' from you. You and Natalie came to stay with me, in my house, and you behave like that, in my spare bed. Well, that's fine." Hannah was still touching Penny, stroking and fondling her body. "But there are rules. I'll be talking to Natalie when she gets back -- I heard her telling you about how rude she is and it is clear that she'd been spanked. But you, well, you've been bad too. You've been rude by getting my bed all wet and being dirty without letting me know." Penny tried to interrupt again, but was cut short as Hannah slapped her across the face. The blow was not hard, but it shocked Pen to tears. "No interruptions, Penny. As I said, you were dirty without telling me -- well, for as long as you're in my house, then dirty leads to dirty, so I'll decide when you can be clean. If you want to go to the toilet, you can use your panties like Natalie apparently does. And you can keep them on, wet or messy, I don't care. If I find you've used the bathroom or changed clothes without my permission, the spanking you get will make the one you gave Nat look like a pat on the bum!" As Hannah had hoped and suspected, Penny was a natural submissive, despite her spanking of their flame-haired step-sister. She simply stood, silent and aghast, fat tears rolling down her pretty face, as Hannah delivered this lecture. Encouraged, Hannah decided to roll with it. "In fact, you and Natalie are here for another week and I don't want to have to do laundry every day, or give you permission every night, so we'll need to make some very clear rules for both of you to follow. And maybe..." she smiled as another plan formed, "maybe we'd better get you some nappies." "Please, Han, please..." was all Penny could choke out. But despite her protestations, she made no attempt to stop her older sister from stroking her body, and it was clear that her nipples were stiff with excitement. "So, I think you came up here for the loo?" Hannah raised an eyebrow as Penny looked at the carpet, downcast. "Go on then." Penny made to break the hold Hannah had, moving towards the bathroom. "No! I think I was clear, Penny. I said: go on then." "Nooo, please, don't," was all Penny could whisper, as she sobbed. But still she made no move to fight her sister, no move to stop her sister from running her hands across her breasts and bottom. "Oh, of course, if you do go in your panties then you'll be punished for being a dirty baby, too," Hannah gleefully noted. "So either way the next week will be painful. If you go in your pants, you'll stay that way until I decide you can change. And then you'll be spanked. If you go to the toilet you'll be spanked and caned. On a night I'm putting you in nappies. In the morning, if you've used the nappy you'll be spanked. If you haven't, I'll have to assume you went to the toilet in the night so you'll be spanked and caned. But you won't be alone -- Natalie will get the exact same treatment." It was all too much for Penny. As if the events of the last couple of days -- her blossoming, lesbian interest in her step-sister going so right and wrong all at once -- had not been enough, she was now somehow being coerced into accepting that her sister, her actual relative, was forcing her to use her knickers as a toilet and be punished, or use the toilet like a normal girl and be even more punished! None of it made sense, she simply couldn't process. But, slowly, thoughts rose to the surface. She'd started this by touching Natalie -- so maybe she deserved punishing? She'd been very turned on when Natalie went in her panties -- so maybe she should too? She'd loved having sex with her step-sister -- so why not with her sister? She'd enjoyed spanking Natalie -- maybe she'd like to be spanked? Penny sagged in Hannah's grip, and covered her tear-streaked face with her hands. Time seemed to stand still for a minute, then a smile spread across Hannah's face as a wet patch spread across the front of Penny's leggings. The 23-year old had let go fully, and her piss flooded her panties, the flow following the seams of her leggings down her inner thighs as well as running around the fold of her bottom, soaking up the back. She cried brokenly as the warm, yellow liquid shamed her in front of her smiling sister, and knew this meant she'd have to stay in her piss-wet knickers until Hannah decided otherwise and would soon find out what Natalie's spanking had felt like. The carpet between her feet was wet now, as her piss trickled down her calves and splattered on the floor. As more piss ran down her legs, Penny realised she was actually looking forward to this. Her submissive soul could not wait for the punishment to begin, and images of her sisters' nude bodies, her spanked bottom and panties full of shit swirled in her head as she cried and pissed.