Date: Sat, 23 Apr 2005 12:17:19 +0100 From: X Subject: Her Brother, part 5a THE STORY SO FAR... Since my girlfriend Steph found out about my bisexual fantasies, we've had two amazing threesomes... with her brother. After the latest time, when Jamie shot his cum over both of us and Steph licked her brother's cock clean, she dropped the bombshell that she wanted to watch me fuck my sister, Katie. Not long after, I found myself in the shower with Steph and Katie, being jerked off by the former and spraying my cum over the latter... and that very same night, Steph got to have her first experiences with a woman when my cousin Rebecca came to visit (and, as it turned out, stay the night). ~ AUTHOR'S NOTE: For those who can't wait for the incestuous stuff, skip down to about halfway! ~ For the next couple of weeks, things were pretty much normal in our lives. Every now and then I'd get so horny that I practically begged Steph to fuck my ass with her dildo, which she was always happy to do. She loved fucking me with it while I lay back on the bed, my legs in the air, and she would squeal with excitement as she jerked me off, making my cum shoot all over my chest. I'd also started paying more attention to Steph's ass - although I hadn't said so, I had wanted to fuck her that way ever since I did it to my cousin Rebecca while she lay on top of Steph. More and more often, I would slip a finger or two into Steph's ass while we were in bed, and she would squirm excitedly, calling me "daddy" while she did it - something she'd been doing a lot since Rebecca's visit. One Friday at work, Steph called me up. It was about an hour until the end of the working day. "Hi," came her voice, quiet and breathy. "Hi," I answered, "are you okay?" I heard a low moaning from the other end of the phone. "I wanted to tell you that I have a surprise for you." I heard the sound of skin against bedsheets from the other end of the phone. "Mmmm?" I said, keeping my voice low in the office. "Mmmm-hmmm," came her reply. "A very sexy surprise. I got all horny thinking about it, so I just had to get my dildo out and f..." - she drew out the F, teasingly, "...fuck myself with it!" I didn't need to think what to do. "I'll be right there," I whispered, then slammed down the phone, announced that I was leaving to my colleagues, and practically ran from the building. I was lucky not to pass anyone on the way to my car, or they would have seen the rock hard bulge I had grown in my pants. ~ I was lucky not to get pulled over in my haste to get home. I burst into the apartment and the first thing I saw was Steph's dress in a crumpled heap on the floor. The bedroom door was open, so I scooped up the dress in my hand and slowly entered, wondering what could be awaiting me. "Hi," said Steph. She was kneeling on the bed, facing me. On her legs where a pair of black stockings. Her breasts were held by her sexiest black bra. But my eyes barely had time to skim over her body before they were drawn to her hands, both in front of her crotch. Between her legs was a 6" black strap-on dildo. I gulped, suddenly dry-mouthed, staring at the enormous cock my girlfriend was wearing. She had both her hands wrapped around it, one at the base and the other next to it, but there was still almost a third of the length exposed. "What do you think?" she asked out loud, licking her lips. "It's... huge," was the best response I could come up with. "Strip," she commanded, a wicked looking lop-sided grin on her face. Needless to say, she didn't have to tell me twice. I almost tore my clothes off, my rock hard cock springing free and eliciting a hum of excitement from Steph. She beckoned me with a finger, her other hand still stroking up and down the dildo. I climbed on to the bed, my cock swinging stiffly between my legs as I crawled towards Steph, my eyes locked on the cock that protruded lewdly from between her legs. She looked down at me, her eyes narrowing as I looked up, my eyes first taking in her breasts, her nipples already hard without even being touched. "Suck it," she whispered, and I reached up to grasp the dildo. She moved her hands around behind her back and unclasped her bra as my fingers wrapped around the soft rubber shaft. My fingers slipped down the realistically bumpy shaft - Steph had already coated it with some kind of lube, but I could tell it wasn't the kind we usually used. I shuddered, my cock throbbing as I began to think of the reason she had used so much lube. I moved my head forward, pulling the dildo towards me, making Steph take two faltering steps on the bed. Her second step pushed the bulging tip of the dildo between my lips, and I opened my mouth wide to accept it. With a little surprise, I realised it was actually strawberry flavoured - or at least the lube was. I shuddered and felt myself blush - Steph had known I'd be unable to resist sucking on her new cock. She pushed her fingers through my hair as mine wrapped around my own aching cock. I heard her moan with excitement as I started to stroke myself slowly. I slid my free hand up the back of Steph's legs and cupped her asscheek. I felt her shudder, then her hips began to move, thrusting slowly towards me. I stopped moving my head, and she started to slide her dildo back and forth between my lips, fucking my mouth. At one point she pushed a little too hard, and I jerked my head back with a cough. She looked down at me apologetically, stroking my head and whispering "sorry." I smiled back and wrapped my lips back around the plastic shaft eagerly, and she restarted her humping motion, just a little more gently than before. Somehow that little incident brought back to me just what I was doing - and how slutty I felt doing it. I suddenly had to release my cock from my grasp - I wasn't ready to cum just yet, not before Steph had really got to use her new toy. Instead I let my hand travel up to join the other at her ass, leaving a trail of cooling precum on Steph's skin. I took firm hold of her ass, a cheek in each hand, spreading them apart and letting the cool air breeze over her exposed asshole, making her gasp. She slowly pushed her ass back, pulling the slick dildo from my mouth. She got down on her knees, mirroring my position, her hands sliding over my thighs. My own hands stayed holding her ass, so I had to lean forward, putting my head in front of her chest. I put out my tongue and found her hard nipple with it, my nose and lips pressing against her soft flesh. Steph's hands slid around behind me without touching my cock, which I silently thanked her for - the slightest touch just at that moment would have sent cum exploding from the tip. She held my asscheeks like I held hers, then she began to pull herself up, urging me up with her. I kept my head down at her breasts, sucking in a deep breath as the dildo between her legs slid alongside my cock, managing somehow to put off my impending orgasm. "Ohh yes," she moaned softly as her hands moved up and down over my asscheeks. "That's a good boy," she continued, seemingly finding her voice after we'd been silent for so long. Her hands started moving up my back, spreading my asscheeks open one last time before she moved her fingers into my hair, pressing my face between her breasts. "Mmmm..." came her whispering voice, "suck mommy's tits!" Before I had a chance to answer, she pushed herself up on her knees, pressed her body against mine and slid back down, forcing my cock down and under her, sliding up between her asscheeks. I shuddered and pushed her asscheeks together, squeezing my cock between them. I looked up at Steph from between breasts glistening with my saliva. "God, I love your tits so much mom," I moaned. "Oh yesss," she hissed, mussing my hair in her hands as I lowered my lips back to her wet nipple. She moved her ass against my cock, making me grunt from a mixture of painful discomfort and near-orgasmic pleasure. "Mmmm," she whispered in response, "mommy's little boy has such a big dick!" I pushed forward with my hips, my cock leaking precum as the tip probed against Steph's warm, inviting asshole. Her own "cock" slipped back and forth against my chest, leaving a trail of slick lube on my skin. "It's all yours, mommy..." I whispered, reaching further around her ass, pressing my fingers against my shaft. She sighed and shook, grinding her ass down slowly, my hard tip forcing it's way against the resistance of her tight asshole. Then everything seemed to slow down, and for what felt like many minutes we slowly moved together. I felt the ring of Steph's ass stretching around my cock, getting tighter and tighter as my tip moved into her. At long last, and with a squeal from Steph, her ass reached the widest point of the tip of the cock. I felt her ring tighten again, pulling my tip into her and gripping around my shaft. I concentrated on my cock, making the tip throb inside her, and her breathing quickened. I looked up and her eyes were closed, her mouth hanging open. Then it was my turn to gasp as she made her asshole clench around my shaft. Again we stayed like this for minutes, each stimulating the other with just the tiniest movements of our bodies. Eventually I decided to break the silence. "How does that feel, bitch?" I asked her out loud, knowing she'd love the name calling. Sure enough, a wide smile broke out on her face. "Ahh," she moaned, stutteringly, then she opened her eyes and looked down at me. "You'll find out soon." Then her eyes closed once more, a strange look passed across her face, and I felt her asshole clench hard around my cock, forcing me out of her. As my cock popped out of her ass, she gasped, sighed, and her face turned bright red in embarrassment. She later told me that pushing my cock out like that had felt like she was - to be indelicate for a moment - just like taking a shit in front of me. I surprised myself by finding the statement a turn on, but that's a different story. Steph carefully got to her feet, putting a hand on my shoulder to steady herself. She put her hands on her hips and looked down at me, humming to herself. "Hmm... you need to dress up." She dropped to her knees and bent over away from me, opening the drawer at the side of the bed. I sat watching her, my fingers wrapped around my cock as I watched the strap-on dildo swaying around under her. The straps went around her waist and around the tops of her legs, just above her stockings, leaving her ass exposed. I took my opportunity and knelt forward, putting my hands on her ass to support myself, spreading them wide and pushing my tongue up between them, wriggling it against her asshole. She shuddered and gyrated her ass back against my face. "Oh god, you dirty little slut," she moaned, making me moan in response between her asscheeks. With a reluctant grunt she pulled herself away, spinning and sitting down in front of me so quickly that the end of the strap-on slapped against my face as it swung, making us both burst into laughter. It took a minute or two to compose ourselves, then she took a deep breath and fixed me with her gaze. She held her hand out, holding crumpled in it the pair of stockings that my cousin Rebecca had left with us. I started to sit back to put them on, but Steph stopped me with a shake of her head. She patted the bed in front of me. "Get on all fours," she said, in a commanding tone of voice. I obeyed, happily, then watched her over my shoulder as she moved around behind and beside me. With the dildo still swinging, a little ridicuously, between her legs, Steph started to run her hands quickly over my body, paying particular attention to my ass and crotch. She shuffled closer to me on the bed, and I felt her stockinged legs swished against my asscheek as her fingers wrapped tightly around my shaft, stroking me with the stocking that she held in that hand. I very nearly came right there, but then her other hand was on my leg and she said, in that same commanding tone of voice, "lift." Once again I obeyed, balancing on my hands and remaining knee as I stretched my leg out behind me. She let go of my cock as if discarding a toy, shuffling on her knees and spreading her hands along my leg. She started to hum a little tune, which added to my position made me blush in humiliation - not that my cock was complaining. She held my ankle in one hand and hooked the toe of the stockings over my foot, then began spreading her hands down up my leg, sheathing me in the soft, sexy material. She guided my leg back down the bed, then with a gentle touch had me lift my other leg to repeat the procedure. This time when her hand finished sliding up my leg, she slid higher, Her fingertips cupped my balls and her thumb pressed between my asscheeks. I pushed back, relaxing and letting the tip of her thumb push into my ass. I couldn't help gasping out, "Oh fuck yes!" which made Steph laugh evilly. "You like that baby? You want some more?" she cooed. "Do you want this" - she slapped her dildo against my asscheek as she twisted her thumb inside me - "up your ass, bitch?" There isn't much that turns me on as much as being called a bitch, except being called a slut. Steph knew it, but I showed her anyway, sucking in a breath and squirming against her hand. My cock throbbed up against my belly, and without looking back at her, I said out loud, "Yeah, give it to me... I want your cock in my ass, mommy. Fuck me." I knew Steph would be equally turned on by my dirty talk. I felt her move around me on the bed, pulling her hand away from my ass and gripping my asscheek with it. She slid the dildo back and forth between my asscheeks a few times, whispering about how I'd been a naughty boy, and how mommy was going to give me what I deserved. She drew all the way back, and then I felt the tip of the dildo, covered in a condom to save washing it later, pushing into my ass. "Oh yeah," I moaned quietly, reaching back one hand to spread my asscheeks wide. "Ooh, it's going right in," whispered Steph as she pushed with her hips, shuddering with the effort of stretching open my tight ass. For a while we were silent, our heaving breaths the only sound in the room. Then I gave a little grunt as Steph pushed deeper, so she stopped, and I felt her legs spread wider on the bed. The sound of her breathing came closer as she leant over me and began to pull back. "I'm ready to fuck you now," she whispered, as I gritted my teeth against the feeling in my ass, trying my best not to push back to get her dildo deeper inside me. I felt myself stretch outwards, my anus gripping tightly, but I managed to pull myself forward and up along Steph's phallus. She kept going until I felt my ass clench tight around the slight narrowing of her dildo, just under the head. She paused for less than a second, before pushing forward again with her hips, barely giving me time to push back before the dildo was as deep, maybe even deeper, than it had been a moment ago. As the strokes continued, I felt my ass begin to relax, and Steph was able to pick up the pace until she was well and truly fucking me, pulling out and pushing in almost once every second. "Oh yeah, we're really fucking now baby," Steph whispered, echoing my own thoughts. Between panting breaths, I managed to reply, "Yeah mom... fuck my tight ass." >From then on it became an exchange of gasped pleadings, sultry compliments, and erotically charged abuse. "Fuck me harder mommy"/"You love this, don't you, you little slut?"/"I'm so fucking hard..."/"Take my fucking cock in your ass, bitch!" Soon I felt Steph's thighs brushing against my asscheeks with every thrust, and then brushing became slapping and she probed deeper inside me. There was less discomfort than I had expected, or perhaps it was drowned out by the incredible arousal I was feeling from being anally penetrated by my lover. With her fingers digging into the flesh of my asscheeks, Steph was standing up straight behind me, her hips doing all the work. "You're fucking loving this, aren't you?" she said, doing her best to humiliate me. It was working, and it was turning me on, and I told her so. "I knew it... you love mommy shoving her cock in your ass, fucking you," she said. I nodded and she continued, faking a grunt of disgust. "I bet you want me to play with your dick too, you fucking pervert." I certainly did. "Fuck yes... please mommy," I moaned, pleadingly. I felt Steph lean down over me, her breasts sticking against my back from our sweat. Her hands felt their way under me eagerly, but she kept up the disgusted act. "Dirty little bitch... I can't believe you're making mommy do this," she sighed as her hands wrapped easily around my rock hard shaft, stroking me just the way I liked it. "I'm sorry mom... just fuck me a little more... I'm getting close..." I moaned, not exaggerating in the slightest. I'd almost cum as soon as Steph's fingers touched my cock, and only my determination to cum over Steph, as was becoming tradition, had stopped me. Thankfully we shared that understanding, and she let go of my cock, placing her hands back on my asscheeks and slowly pushing me forward. I in turn tried to pull myself forward, slowly freeing myself of inch after inch of plastic cock, until only the wide tip was left. "Okay?" she whispered, as if careful not to break the roles we'd built up for ourselves over the last ecstatic hour. I nodded and bit my lip, and she pulled back, one swift movement, wrenching the dildo from my ass. I gasped out loud at the strangely familiar feeling, muttering "Oh shit", so sure was I that I had just messed myself. But when I turned over on the bed, all I saw was my beautiful girlfriend/"mommy", sitting up on the bed with her legs spread, feet firmly planted on the covers and knees raised. She had the base of her thick dildo in her hand, her other hand behind her to steady herself. Her eyes locked with mine, and she licked lips before speaking. "Come and sit on mommy's cock, baby," she said, eyes half-shut lustfully. The only thing that stopped me leaping to my feet was my poor stretched ass. Instead I clambered up carefully, stepping over Steph. She kept her eyes on me the whole time as I bent my legs and lowered myself. As my cock came within range, she opened her mouth and extended her long tongue, lapping up along the pulsing length of my shaft. As I felt the tip of that dildo once again spreading open my ass, Steph lowered her head and engulfed the tip of my cock, making me freeze in position. But then her hands reached up to grab my asscheeks, pulling me down and reluctantly out of her mouth, looking up with a smile and licking her lips, the taste of my precum undoubtedly fresh on her tongue. I closed my eyes and continued lowering myself, surprised at how easily my ass accepted Steph's shaft. Steph shifted on the bed, making me grunt in discomfort, but she quickly stilled as I felt her chest come forward and press against my shaft. I looked down to see my cock pointing up between her breasts, and almost automatically I reached down and pushed her breasts around my shaft. "Mmmm, are you gonna fuck mommy's tits while she fucks your ass?" she purred, eliciting a shudder of excitement from me. By now I was almost two thirds of the way down, and Steph's hands moved from my asscheeks to my thighs, now pushing down instead of pulling. I squatted down, taking the last couple of inches in one movement, my feet firmly planted on either side of Steph's body, my ass resting against her uplifted thighs. My cock had slipped from between Steph's breasts, but I kept hands on them, kneading them between my fingers. At some unseen signal, we both began to move. Steph pulled her ass down into the bed as I began to push myself up. My cock pushed it's way back between her breasts, as my tip broke through the top of her cleavage, she dropped her head and lapped over my tip, pushing out a mouthful of saliva, and as I lowered myself back down my cock left a lubricating trail between her breasts. "Aw fuck," I gasped as she pushed her shaft deep inside my ass again, "jerk me off, slut," I half-begged, half-commanded. Steph's hands grasped my cock, her fingers interlocking, her thumbs up so she could press my shaft against her chest, her elbows sticking out to the sides. As her hands began to work their magic, flying up and down my shaft in perfect rhythm, I increased my own speed, bouncing up and down in her lap, fucking myself with the dildo that protruded from between Steph's legs. "Cum for mommy bitch," she purred. "Cum for me slut!" I moaned, getting hotter and hotter with every second. Steph's words turned into a string of degrading, humiliating terms. "Bitch! Slut! Whore!" she started shouting, and I replied, more coherently, "I'm going to cum over your face... your fucking tits..." "Shower mommy in your cum!" she squealed. "I'm your slut... your cunt..." That was a new one on me. I'd never even heard Steph use the word cunt at all, let alone using it to describe herself. It was the final straw, and I felt my balls rise up into my body, ready to fire. "I'm cumming... you fucking cunt..." Steph looked up and grinned, her hands still flying on my cock, her eyes closing a moment later as the first fountain of cum erupted from me, seeming to arc up in slow motion before splattering down in a long streak that covered her from forehead to chin. I felt the dildo's hard shaft in my ass as my muscles clenched around it, making the next shot even bigger, streaking through my girlfriend's hair as she twisted her head back and forth, in the throes of her own near-silent orgasm. Even when I was completely spent, Steph was still quivering under me. When she finally finished cumming, we sat there catching our breath for what seemed like hours. Then, eventually, silently, I pulled myself up off the strap-on, while Steph watched it being pulled out of my ass with a smile on her face. She murmured something about being surprised that I could take it as she pulled the condom off the dildo and put everything away. At last we crawled into bed together and fell asleep in each other's arms. ~ A few days later, Katie called me up. We'd spoken a few times since what was becoming known between Steph and I as "the shower incident" - when Steph had masturbated me in front of, and over, my younger sister - but it hadn't been mentioned again. She was having trouble with her laptop and wanted me to take a look at it. As it's my field I tend to get all the family's "support calls", but I was more than happy to help. I told her to bring it over later that day. Half an hour later Katie arrived at my doorstep, wearing jeans, sneakers, and a white sweater. "Hey bro!" she said cheerily, and I leant forward to give her a hug that somehow became a kiss on the cheek. I'm pretty sure she looked down and blushed, then distracted herself by pulling off her backpack and handing it to me, along with a verbal description of what the problem was. It sounded like something I could fix quickly, so I invited her in to wait. Steph had heard our voices and came through from the kitchen. She and Katie said their hellos and Steph invited her to sit on the couch. I told the girls I needed to hook Katie's laptop up to mine, and excused myself to the bedroom. While I worked I could hear Steph and Katie chatting in the other room. I couldn't make out words but I could tell that what started out as polite conversation was turning into girly chat, interspersed with whispers, gasps, and giggles - not to mention liberal use of my name. I finished up with Katie's laptop and shut it down to pack it back into her backpack. As I stood and headed back to the living room, I heard shushing and whispers of "He's coming!". I stepped out of the bedroom expecting the girls to have just finished talking about me. My jaw literally fell open as I took in the sight before me. Sitting at either end of the couch were my sister and girlfriend, just as I had left them - but both, now, were topless. Steph's t-shirt and bra were on the floor, but Katie still held her bra in her hands, the straps hanging loosely around her elbows. For a split second there was silence as I stared openly and alternately at my sister's breasts, then Steph's. From the hoots of laughter that followed from the girls, that must have been the reaction they were expecting to get from me. Katie threw her arms back around herself, pulling her bra back up her arms to cover herself, but Steph stayed as she was, convulsing with laughter. I started to laugh too, partly because it was funny but also because I felt like I had to defuse such a sexual situation. "You should have seen the look on your face!" Steph crowed, and I threw a fake scowl in her direction. I made my way over to the couch, stepping past Steph and dropping down on to the couch between the girls, glancing quickly at Katie beside me, still holding her bra over her breasts. "Nothing I haven't seen before," I shrugged, feigning nonchalance, but deliberately referring back to the last time I'd seen Katie semi-naked. Steph slapped her hand against my knee, then ran her fingers up my thigh until she found what she already knew was there - the head of my rapidly englargening shaft straining against the leg of my pants. "Yeah," she said, thoughtfully, "you got a hard-on *last* time you saw Katie's tits, too, as I recall." I felt my face start to flush, although most of my blood was gathering lower down. I bit my lip, keeping my eyes on Steph. She smiled wickedly back at me, then quickly flicked her eyes past me at Katie, as if trying to draw my attention to my something. I turned my head almost automatically, even though I was embarrassed to once again find myself aroused in the presence of my sister. Katie was laying back a little in the corner of the couch, one arm by her side, the other still holding her bra in place over her breasts. As my eyes slowly came up to her face, I saw she was smiling shyly back at me. She could only hold my gaze for a few seconds, but when she was looked away, her eyes tellingly drifted down to Steph's hand at my crotch. A tut from Steph drew my attention back to her. "I guess I'm going to have to care of you again," she sighed wearily. Then she looked up and over at Katie, her hand still squeezing slowly around my cock, the head and shaft distinguishable and easily visible as a throbbing bulge in the leg of my jeans. "If that's okay with you, Katie?" she added, her eyebrows raised in question, but there was little risk that she was going to stop now. I turned back to Katie, who kept her eyes on Steph. I could see her face visibly flushing, but she did her best to act cool, shrugging her shoulders against the back of the couch and replying with a non-commital "mmm, no." Steph grinned and squirmed closer to me on the couch, her bare breasts pressing against my arm. She slowly moved her fingers over me, unbuttoning and unzipping my pants, but keeping at least one fingertip stroking against my shaft at all times. I knew Katie was watching intently, but I couldn't quite bring myself to look at my sister just yet. From the corner of my eye I saw her sit forward, take a sip of her glass of water, then sit back, one arm across her breasts the whole time, holding up her unclasped bra. By now I was completely unzipped, with just my boxer shorts keeping Katie's presence from tipping over into incestuous voyeurism, but Steph wasn't going to let that line stay uncrossed for long. She slid off the couch and on to her knees, shuffling between my feet and reaching up to grasp my pants and boxers in the front, her fingertips grazing the tip of my cock. I hurriedly lifted my hips, doing my best to pretend my sister wasn't there, yet immensely aroused by her presence. I certainly couldn't help noticing, out of the corner of my eye, that she leaned forwardly slightly just at that moment. Steph gave one tug and exposed me, all but my balls now visible to my sister. There was a quiet but definite exhalation of air from Katie, but Steph was already moving her hands around to finish the job, tugging my pants down to my knees where I could sink my ass back down on the couch and kick my clothes down to my knees, frantically pulling my shirt over my head at the same time. I barely had a chance to kick everything off my feet before Steph was shuffling forward on her knees and running the palms of her hands against the sides of my cock. "Mmm, there we go, that's so much better," she murmured, throwing in a bit of motherly concern into her voice, though I knew that part, at least, would go over Katie's head. Steph wrapped one hand around my shaft and pointed it partway towards Katie. "What do you think, Katie?" she asked, her voice at a normal level and sounding natural, as if she wanted an opinion on a pair of shoes. I could actually hear Katie gulp and take a breath, before she cleared her throat to answer, in a half-whisper. "It's... pretty big." Steph looked up from her place on her knees. "Mmmm, yeah it is," she purred, her eyes drifting back from Katie to her hand on my shaft. She wrapped her other hand around it, both hands not quite able to conceal the full length, and squeezed, making the tip swell. "You wanna touch it?" Steph whispered, this time unable to conceal her own excitement. I moaned and my cock jerked in her hands, precum oozing from the tip and dripping down her fingers. I looked up at Katie, too eager to see her response to avoid looking at her any longer. She was biting her lower lip, her eyes fixed on my cock at first, but when she realised I was looking at her she met my gaze. She held that look for a long time, and I think both of us were preparing ourselves to cross the line into incest once again - and to go further than we had before. Finally she tore her eyes away from me and looked down at Steph, who hadn't stopped stroking my shaft with both hands. Katie smiled shyly as she nodded, eagerly. Steph grinned happily and took her left hand away, leaving the upper half of my shaft uncovered for Katie, who shifted on the couch next to me, lifting one foot off the floor and tucking it under herself, turning towards me. Slowly, hesitantly, she reached out her hand, leaning forward and closing her thumb and forefinger around the end of my shaft, just below the tip. I moaned and shuddered, my cock throbbing and pumping out precum, which flowed thickly onto her thumb. She made a strange, quiet squeak, and I glanced at her face to see her smiling in rapt fascination. From the corner of my eye I saw that Steph was also looking at her, and my girlfriend and I shared a quick conspiratorial glance. "Yeah, that's it," whispered Steph, as Katie started to move her thumb and finger up and down in short, quick strokes. The rest of her fingers were held delicately away from my shaft - until Steph reached her left hand back up and wrapped it around Katie's, pressing her hot fingers around my shaft. While their three hands stroked my shaft, Katie's other hand was trapped between her side and the back of the couch. She wormed it free and draped it over the back of the couch, behind my head. Quite consciously, I mirrored her movement, but moved my own arm around my sister, placing my palm against her naked back. I was rewarded with a shy smile, and she leaned a little closer, her clothed knee pressing against my naked thigh, and her bra hanging revealingly forward off her body. I saw Steph's mischevious eyes looking at my sister's chest, and the bra that was barely keeping her decent. I decided it was time to take the initiative for myself, and twisted towards my sister, bringing my other hand up across her shoulder, hooking her bra strap over my finger. "Can I take this off?" I said, low but loud enough for Steph to hear. She sat up a little straighter and moved in a little closer between my legs, her hands slipping off my shaft to squeeze my balls. Katie looked into my eyes, our faces just a few inches apart. I could feel her quick breath on my lips, and her head bobbed in front of me, betraying the movement of her hand around my cock. Then she licked her lips, hesitated, and nodded her head. I didn't waste any time. I pulled her bra strap off her shoulder and let it slip forward. I glanced down and saw one hard nipple exposed. Katie herself brought her arm from the back of the couch and slipped off the other strap, leaving both her small young breasts bare. She hadn't been able to take her hand away from my shaft, though, and her bra was left hanging from her wrist, the soft material doing nothing to lower my arousal as it brushed against my thigh I stared openly at Katie's breasts, licking my lips and thinking back to the last time I had seen them - when Steph had jerked me off until I came on my sister's chest. I dragged myself back to the present - which wasn't hard - and started moving my hand towards Katie again, my fingers spread, palm open, my intent obvious. Katie didn't move away - in fact I think she moved herself a little closer - as my fingertips came in contact with the soft flesh of her breast. She gasped and shuddered, arching her back and forcing her stiff little nipple against my palm. Her hand started to speed up on my cock, rhythmically squeezing her fingers around my shaft. I pushed against Katie's back with the palm of my hand and sat back into the couch, pulling her with me, one breast crushed in the palm of my other hand, the other brushing up and down against my chest as her hand pumped on my cock. Our faces were barely an inch apart now, and all I could hear was our breathing. I licked my lips suggestively, then without waiting for permission I lifted my head and pressed my lips against hers, fully expecting to be pushed away, but knowing I had to take that risk. To my pleasure she didn't resist, and instead I felt her lips part under mine. I forced my tongue between them, somehow feeling I'd broken an even bigger taboo than letting my sister jerk me off, or playing with her tits. >From somewhere in front of me, I heard Steph call out, "Oh god, that's so fucking hot!" followed by the sound of a zipper, but nothing was going to turn my attention from french kissing my sister. Soon our mouths were open wide, our tongues slurping wetly in each other's mouths. My cock was aching for release, my hips bouncing up and down against the couch, trying to fuck my sister's hand faster than she could stroke it. Finally I could take no more. I broke the kiss, trails of saliva breaking between our lips. I pushed against Katie's chest, still squeezing her small, firm tits, guiding her back off me. "I'm gonna cum on you," I said, so confidently that I don't think Katie could have said no even if she'd wanted to. But she nodded, leaning back into the corner of the couch, spreading her denim clad legs on either side of me as I knelt up on the couch. I felt Steph's hand leave my balls, and I looked down long enough to see her kneeling on the floor, her jeans open and one hand inside her panties. I turned my attention back to Katie and she twisted her hand around on my cock, opening her fingers and gripping my shaft again, this time with my shaft running along her palm, her long fingers pressed against the shaft, her fingertips almost reaching my balls. I knelt closely over her, my precum smeared tip rubbing against her belly. I put one hand up on to her shoulder, and pushed the other under her ass. I felt Steph's breasts against my hip as she reached out for Katie's other hand and slapped it onto my asscheek, my sister's fingers excitedly digging into my flesh. Steph's hand moved to my other asscheek, and between them they spread me wide, exposing my asshole and sending shudders through my body. I could feel the girls' fingers touching as Steph forced her fingertip into my ass, and I guessed that Katie must have known what was happening. It was enough to send me over the edge. I closed my eyes and locked lips with my sister again, moaning into her mouth as we sucked noisily on each other's tongues. Her hand was flying erratically over my cock as it swelled in her palm, The first volley of cum erupted from my cock just as Steph's hand joined Katie's on my shaft. I almost saw stars from the intensity, but I managed to keep my eyes open just long enough to see Katie's mouth opening in shock as my hot watery cum streaked across her lips. As I shot again, I pressed my lips against Katie's, forcing my cum into her mouth and sharing it with her. We both jumped a little as we felt my cum splashing up against both our chins. Even I was surprised at the power of my orgasm. We continued to kiss as my cock continued to spray Katie's body with my cum. Steph later told me that she was behind us frigging herself to orgasm, but she didn't mind that we didn't notice. Finally I collapsed on top of my sister, my softening cock pressing into her crotch, leaving spots of cum on her jeans. Katie wrapped her arms around me and we lay there for what seem like ages, catching our breath. Finally I pulled myself up over Katie, both of us wincing and laughing at the feeling of the sticky trail of cum that was gluing us together. I looked down between us to see her small body glistening with my cum, and I reached a hand down to grope her breast. "That was incredible," I whispered, looking back up into her eyes. Katie bit her lip and just smiled back at me, her arms still around my neck. Finally she found her voice. "I need to get cleaned up..." she said weakly, but making no move to get out from under me. That was when Steph piped up, standing next to us with her jeans opened and her panties pushed down, almost exposing pussy. "Don't worry Katie," she said, taking Katie's hand and guiding her out from under me, leaving me to struggle to my feet, my limp cock dripping cum down my leg. "We'll take care of that." Katie's eyes widened and she turned to me, a question on her face. But Steph was already leading my sister into the darkened bedroom. TO BE CONTINUED...