5 comments/ 174297 views/ 58 favorites Sister's Stay By: Reeb76 About 8 years ago my sister broke up with her boyfriend and needed a place to stay. I had a 2-bedroom house so I offered a room to her and she accepted. Her name is Amy and she agreed to stay only until she could save up enough money and find her own apartment. Let me tell you about my younger sister, she is about 5 ft. 4, weighs about 115 pounds, curly sandy blonde hair, measures around 36-23-35 and is about 10 years younger than me. Even though she is my sister, I always wondered what she'd be like in bed. Her ass is perfect and her tits are simply the best I've ever seen. She has nipples about 1/2 inch when erect so it's easy to tell if she's cold or aroused. She always has a dark tan and super sexy tan lines which I've caught glimpses of on occasions. I've seen her in this red, white & blue one-piece bathing suit, which is very thin and does not leave much to the imagination. She must have removed the liners as you can clearly see her nipples and the small tufts of pussy hair through her bathing suit. She could easily be a model if she tried but at 19 years old she wasn't sure what she wanted yet. She is my sister so I kept my fantasies to myself and gave her the space she needed to get over the break up with her boyfriend. After about 3 weeks, I got up one morning and staggered to the bathroom with a morning hard-on needing to take a leak. As I entered through the unlatched bathroom door, still half asleep, I got a surprise never expected. My sister was in the tub taking a hot bath, leaning back, with a washrag over her eyes. I was fairly quiet entering the room and I just stood there for a minute feasting my eyes on her young beauty. This was my first chance to see my sister's naked tits and her neatly trimmed pussy. The curves of her stomach and hips all coming together at her sweet pussy. I stood there taking in all the sweet curves, from the firm round globes of her breasts down to the sensual turns of her smooth sexy legs, all shimmering from the wetness of the hot water which enveloped them. I could just see the lips of her cunt slightly showing through the bubbles and water. Man, I tell you, my cock felt like it grew 2 inches. All of a sudden she realized I was there and I came crashing back down to reality. "Ron, what the hell are you doing in here?" and quickly tried covered herself with the small washrag the best she could. We only have one bathroom and I explained I had to piss real bad, apologizing for not knocking but stating the door wasn't latched. To my surprise, she told me to go ahead and go but make it quick. As I stood at the toilet, with my back to her, I could see her in the mirror above the sink. Her tits were still covered by the washrag but I could still see the firm round sides of her boobs. After several minutes, I was finally able to relieve myself even though my cock was hard as a rock, it just took a little longer to go. As I stood there finishing, holding my 7 inch hard cock in my hand, I found myself again looking at her tits noticing she removed the wash cloth. Her nipples were swollen and looked like large pencil erasers pointing out. There I stood with a raging hard-on, looking at my sexy sister through the mirror. My heart was pounding with excitement. After about a minute of watching those gorgeous breasts, I noticed her right hand was gently massaging her clit, barely visible under the suds. Without realizing, I was slowly stroking my hard cock, mesmerized by the beauty of my sister as I gazed upon her in the bathroom mirror. All of a sudden she asked in a sexy tone, "So what's taking so long over there?" not seeing I was watching her in the mirror. I caught my breath, as my knees felt weak with lust boiling in my body and slowly turned to face my sister. My shorts were at my knees and I held my seven-inch hard-on in my hand. This was her first real good look at my hardened cock and her eyes were locked on it. All I could say was, "Amy, you look so damn good I can't get my cock to go down". By now, the head of my cock was purple with blood and throbbing in my hand. Her next reaction really caught me off guard as she slowly slid up in the tub allowing me full view of her super hot sexy body. With this glazed look in her sexy eyes, she looked into my eyes and said "It seems like my horny brother might need some help with that?" I stood, knees trembling, in disbelief, as she slid up in the tub onto her knees, her face just inches from my cock. She was looking me in the eyes and without saying another word, her gorgeous lips touched the head of my cock. I couldn't believe my eyes as she slowly slid those soft pouting lips over my shaft, watching my cock head disappear, until she had almost the whole length in her mouth. My sister pulled back, holding the head of my shaft in her moist hot mouth. She then began to swirl her tongue around slowly and began a slow in and out motion. As her wet hands held my hips, her head began to slowly swivel from side to side as she moved my cock in and out of her soft mouth. As if that wasn't enough, she began to moan as she did this, sending vibrations through my ready to explode cock. After about 30 seconds of that I said, "Amy, I'm going to cum, Aaaahhhh", and she quickened the pace. As my hips tightened, she pulled my cock from her mouth just as I exploded cum all over those gorgeous breasts. A spurt shot out hitting her chin, as I watched it drip down onto her firm tits. I watched her, dizzy from the pure lust of it all, as she rubbed the white globs of cum into her breasts and licked it off her fingers. She rolled her nipples in my cream, just smiling at me the whole time. I couldn't believe just how hot and sexy my little sister looked. I reached out and pulled her up to me looking deep into her eyes. I leaned forward and kissed her deeply as our tongues chased each other. She was still in the tub so I helped her step out as we feverishly kissed and rubbed our bodies together. "Amy, I want to taste you", I said. She replied "I'm yours big brother, I've been waiting for this for 3 weeks now." I couldn't believe my ears, Amy felt the same sexual attractions I did? I responded "I've waited longer that that." As she leaned against the wall, I slid down her body, kissing my way across her soft belly to her beautiful pussy mound, tasting traces of my own cum. She raised her one leg and put it over my shoulder, giving me full access to her soft mound. I teased her pussy with my tongue as my hands caressed her tight ass and her hands ran through my hair. Amy moaned with pleasure as my tongue touched her clit for the first time. I flattened my tongue and gently slid it across her clit sending shivers through her body. My lips softly enveloped her clit as I flicked my tongue lightly across it. She was rolling her right nipple between her fingers and running her left hand through my hair as I ate her pussy for all my worth. I desperately wanted this to be the best oral sex she ever felt, so I tried not to rush it by teasing her clit over and over. After about 5 minutes of orally teasing her to a point where her heart pounding with lust, I again zeroed in on her clit. I gently sucked it between my lips, holding it there while I firmly flicked my tongue across it. She began to shudder and buck her hips back and forth. I had to really grip her ass tight to keep my mouth on her sweet tasting pussy. Seconds later, she tensed and screamed as she had a powerful orgasm. As I continued to roll her clit between my lips, until she couldn't take anymore and pulled me up, tasting her own pussy juice as we kissed deeply. As we kissed, we were rubbing our bodies together, grinding our hips into each other. My chest hairs caressing her hardened nipples as our tongues danced in a feverish melody. I could feel my hard cock slid between her legs and her slick wet pussy hair part above my cock. She was sliding her pussy lips across the top of my hard cock while we kissed. I felt her warm liquids coating my cock as we rocked back and forth. We were both in a lustful frenzy, our bodies electrically charged in a passionate embrace. This was all happening without hardly any words between us but then she said, "Ron, please slide that beautiful hard cock of yours in me," as she turned around presenting her soft buns to me. She didn't have to ask twice as she turned around showing me her perfect ass as she leaned over the sink. She stuck her ass high in the air and gave me a sight to behold. I got behind her, positioned myself as she reached between her legs and guided my hard cock to her moist entrance. She slowly pushed back sliding my cock deep into one of the tightest pussies I ever felt. My heart was pounding as I looked down at the roundness of her ass, seeing my shaft disappear between her perfect ass cheeks. We then began a slow rhythm, each time I held her hips hard and pushed deeply into her before slowly pulling back out. She moaned "God Ron, that feels sooooooo fucking goooooood!" On each inward thrust, I could feel her soft butt cheeks against my thighs. Man, her ass was just perfect, was all I could think as I watched my cock slowly slid in and out of her. Leaning over her back while continuing our slow fuck, I whispered in her ear "Amy, you have the sweetest ass I've ever seen." She just moaned with excitement, her head thrown back and her eyes closed. I brought my left hand up and caressed her left breast, rolling her nipple between my fingers while we kept up this slow fucking but teasing pace. My other hand slid off her right hip as I reached around and found her clit. I could feel my shaft siding in and out of her as I rolled her clit between my fingers. She began to tremble in sexual bliss. She groaned and shuddered saying "Ooooooh big brother, I'm cummmmmming!" She pushed her ass back hard as she shook and shuddered with an intense orgasm. I just held her there by the hips, my cock deep inside her as the waves of pleasure ran thru her sexy body. It took all I could to not cum just watching the erotic looks of pleasure on her beautiful face as I kissed her cheek and nibbled on her ear. As her orgasm subsided, she turned, my hard cock pulling out of her and we again kissed passionately, holding each other tightly in our arms. As we kissed, I caressed her left breast with my right hand. We broke apart enough so I could drop my head and suck her left nipple into my mouth. Amy rolled her head back and moaned as I worked her nipple softly between my lips. She was kind of sitting on the edge of the sink, leaning back while I gave my attention to her sexy firm breasts. While working first her left nipple, then her right in my mouth, I cupped her pussy in my hand and slid two fingers into her. I flicked her clit with my thumb as she trembled in sexual pleasures. We broke and Amy lustfully said "Ron, fuck me again." She then laid a towel on the bathroom floor and as she knelt down, she sucked my stiff cock into her mouth, bobbing her head up and down a few times. She released my cock and looking into my eyes said "Come on big brother, fuck me," as she laid her back on the towel. God, she looked so fucking hot, lying on the floor with her knees up and legs slightly spread just inviting me to climb on top. I dropped to my knees and pushed her legs apart "Amy, you're the hottest thing I ever saw." She smiled as I positioned myself above her and lined my cock up with her moist entrance. As my cock slid deep into her hot cunt, she wrapped her legs around my back forcing me deeper into her tight box. We again began with this slow hard deliberate paced fucking, but this time I pressed my pelvic bone hard into her pussy, against her clit on each downward thrust. We continued this hard grinding fuck for several minutes until we were both in dire need of sexual release. Amy said "Ron, fuck me harderrrrrrr, fasteeerrrr!" I began to drive my cock hard into her on each stroke, gradually picking up the tempo on each thrust into my sister's hot pussy. We were fucking fast and hard. I could hear my cock squishing in and out of her soaking wet cunt, her hips thumping against the floor on each downward plunge. Moments later, we both shuddered with a very intense orgasm. I felt like I came for minutes releasing what felt like a gallon of cum deep inside my sister's sweet pussy. Amy hips were twitching and bucking beneath me as we came together, her face was contorted with that now familiar look of blissful lust. We held each other there for several minutes, lightly kissing each other, our sweat covered bodies coming down from the intense sexual high we just experienced. As I rolled off and laid next to her, my softening cock wet with our juices, laid against my thigh. We both breathed deeply as we just looked lovingly into each other's eyes. I spoke first and said "Sis, that was the best sex I ever had. Just knowing I was finally fucking my sister, made it so intense." Amy responded "I've wanted to be with you since I was twelve and I had my first orgasm thinking of you. You used to run around the house every night in those sexy black shorts you had that just covered your butt." I laughed at her comment as I said, "I remember checking you out as your body filled out, man Amy, you grew into one sexy chick. From 11 to 13, I couldn't keep my eyes off your growing tits and your sexy ass. I seemed to always catch you running from the bathroom to your room in only your panties." "I did that hoping you'd see me." Amy replied. "Believe me, I did. You made my cock hard more than once." I said. We both laughed and decided to take a shower together to get cleaned up. As we took our shower, running our soapy hands over each other, the hot water cascading over our bodies, we again found ourselves aroused, my cock hardening as Amy's small hands caressed it and we fucked again. We decided to call in sick from work and we stayed home, fucking and sucking all day long into exhaustion. My sister's stay of six months was the best sex of my life and we still get together from time to time even though we're both married now. Sister's Stay - Threesome As I wrote in my previous stories, my foxy 19-year-old sister, Amy, was staying at my house after breaking up with her boyfriend. She was taking her time about finding her own apartment as we were enjoying each other sexually for the past two months. My stacked blonde haired sister was draining my balls dry and I loved every minute of it. I just couldn't get enough of seeing, feeling and touching her superb sexy little hard body. I'll refresh the image of my sexy sister for the reader's mind's eye. Amy is about 5ft. 4inches tall, very curly sandy blonde shoulder length hair, weighs around 110 pounds and has measurements around 36C-23-35. Her ass is one of those perfect heart shaped butts however her boobs are her best asset. She has these very large nipples, which are like beacons begging to be sucked when she's sexually aroused. She's always well tanned sporting some very sexy tan lines. Her body is very muscular and toned from working out several days a week. I really cannot find any flaw in her sweet little teenage body. No matter how I look at her, she gives me a massive hard-on, and she knows it. By now it was getting hot out as it was June and summer was ready to begin. My landlady who lived next door has a beautiful in ground swimming pool, which we can use at any time. One hot Saturday night my sister's sexy friend, Audrey stopped over and we were all sipping a few beers. As the beers flowed down, we decided to hit the pool for a late night swim to cool off some. "You girls into a late night swim." I said as Amy turned to Audrey. Amy said, "Audrey, I have an extra suit you can wear." as they started to head for the stairs to Amy's bedroom. "I hope it's not too small for me in the butt." Audrey exclaimed as they both laughed since her butt was just a bit larger than my sexy sister's. I watched both girls swing their sexy butts as they walked up the stairs. My sister looked over her shoulder and smiled as she knew I was getting aroused again. Her body could always get me rock hard, but looking at the two of them, my 7 inch cock swelled and begged for release from the confines of my tight jeans. I rubbed the length of my hard shaft as my sister's eyes widened. We were both so fucking hot for each other. We would now prance around the house nearly naked, we sleep together nearly every night, fucking like newlyweds. I was loving every minute of this sexy little living arrangement. Let me tell you a little bit about Audrey, she is a sexy brunette, very slightly overweight, nice orange sized tits with a very exquisite shaped ass. Next to my sister Amy, she has one of the sexiest butts I've ever seen. It's just a tad on the plump side but shaped very nice. I've imagined having sex with her many a time but nothing ever happened. I was even at a biker bash one time and got some photos of her in a wet t-shirt contest, which went a lot farther than a wet t-shirt, if you know what I mean. I think Audrey got third place only because she didn't expose her pussy as much as the other two girls. Needless to say, she made my cock nice and hard whereas I had many a fantasy cum over her. Amy and Audrey went up to Amy's room to put on their bathing suits. I hit the bathroom as I was swimming earlier in the day and my suit was drying. I waited in the kitchen as they came down the stairs, which was a sight to create an instant erection. My sister Amy had on this red, white & blue one piece that she knows drives me wild. Although it's a one piece, she looks extremely sexy in it as she removed all the liners. When the suit gets wet you can see her pussy right through the suit and those perfect breasts with her large pointy nipples just show through begging to be sucked. The top is blue with a red stripe across the midriff and the bottom is white from the waist down. God, my cock was instantly throbbing just looking at her in that suit. "Man, you girls are looking hot tonight!" was all I could say, as my mouth was wide open. Audrey was looking extremely hot too as she had on one of Amy's string bikinis. Her suit was white with blue horizontal stripes and the top was one of those adjustable kinds. She had her breasts mostly exposed but her nipples were just covered by the vertical strips of material. The bottom was adjusted very narrow in the front and rear. Audrey had a very nice tan too so with my sister's suit, there were a few exposed sexy white tan lines. Her normal suit covered more of her sweet butt cheeks so I had an exquisite view of white butt flesh exposed from Amy's skimpy little swim suit. "How do you like my suit?" Audrey said as she did a spin to show me how she looked. "I hope the water is cool because you two are going to heat it up! Wow!" I replied feeling my hard rod throbbing. Amy not wanting to be left out said, "Hey, what about me?" as my sister gave a sexy pose too. Next thing I knew they were both modeling their suits for me but when they both turned around a stuck their asses at me I nearly blew a load in my suit, what a sight to see. I had my towel across my lap hiding my fully erect 7-inch hard-on, but they knew the effect they were having on me judging by their laughter. I got up from the kitchen table and said, "Ok, you guys ready." as I tried to hide my erection somewhat with my towel. Amy grabbed a six pack as we went out the back door toward the pool. We crossed the yard heading out to the pool, me following behind these two gorgeous teenage beauties. My sister knows that my sexual weakness is a tight sexy ass so she was swinging her butt nicely as I walked behind them. Audrey picked up on this and she started swinging her ass too. I was drooling as I watched their firm butts barely covered by the thin skimpy swimsuits they were wearing. God, my cock was so hard I could hardly walk. We entered the pool and swam around a little, did some diving and eventually ended up all sitting on the steps drinking our beers. I could tell my sister Amy was feeling a little aroused, as her nipples were standing so erect you could balance a quarter on them. I was sitting in the middle with Amy on my left and Audrey on the right. As I gazed upon their sexy wet bodies, their suits clinging to their soft tanned wet skin, my cock began to swell. It was so hot and humid, but the sexual excitement building up between us was so thick you could cut it with a knife. I wasn't sure how Audrey would react to my sexual attractions to my sister, Amy, but it seemed these two were up to something. Amy said, "Audrey, it looks like Ron is enjoying our company just a little too much." pointing at my now fully erect throbbing cock which was clearly visible through my swimsuit. "Damn Amy, looks like he's got a nice sized hard-on. What in the world could have caused that?" Audrey replied giggling. "I think we should tease him a little and give him a show, how about it Audrey?" Amy replied in a very sultry tone. Audrey looked at Amy with a surprised look, which turned into a very sexy smile. The effects of the alcohol had us all aroused. Both these sexy ladies had very hard and erect nipples pushing through the fabric of their suits. My heart was pounding, wondering what my sexy little sister had in mind. She knew I found her best friend very hot but did she know about our incestuous relationship? The next thing I knew, Audrey stood up in front of me looking directly in my eyes as she started to caress her tits through her swimsuit. I watched as Audrey's fingers slid under the material and over her nipples, causing them to harden further and poke through the wet fabric. She rolled her nipples between her fingers, concealed all the while under her swimsuit top. Amy took the hint, joining her as she stood up and they began kissing each other. I never imagined my sister with another woman until now. What a sexy sight to behold, seeing your sister's tongue stuck in another girl's mouth as they began to feverishly French kiss each other. "Amy, you're so fucking hot. Pull my nipples hard!" Audrey panted as her hands ran down my sister's back to her firm ass. Amy replied, "My pleasure, honey." as she squeezed her nipples and rolled them between her fingers. They were massaging each other's breasts, running their hands down each other's backs, cupping and gripping each other's soft ass cheeks. They were grinding their pussy mounds into each other's legs, while I watched with my heart pounding with sexual excitement and my blood boiling with lust. I couldn't take any more and had to release my cock so I slid my swimming trunks off. The girls saw my rigid cock sticking out of the water and couldn't resist the invitation. I just leaned back as, for the first time in my life, I had two beautiful women getting ready to suck my swollen shaft and the fact that one of them was my sister was an extreme sexual turn on. My sister said, "What have we got here? as she positioned herself on my right side, sitting on the step next to me. Audrey sat on my left side saying, "Looks light a midnight snack, hmmmm, or should I say a meal!" giving both girls a laugh. I don't have the longest cock but it's very thick and the head is very large, especially at this point as it was purple and filled with blood. My cock was throbbing and begging for attention, as my sister Amy was the first to lower her head. Amy cupped my cock in her soft lips as she ran up and down the sides of my shaft. Audrey worked on the head of my cock and eventually won out and took my entire length in her mouth. As she did, Amy was sucking on my balls, gently caressing them in her small hands all the while Audrey's head was slowly bobbing up and down on my shaft. Amy was coaching Audrey on, "Suck that cock baby, yeah that's it, take it in deep! Feel good Ron?" I just moaned, "Aaaahhhhhhhh yessssssssssss!" I all but had to look away to not blow my load too fast. Audrey was real good at giving head, almost as good as my sister. She worked up and down real slow with excellent tongue movement. Her tongue swirled around in a way that was making my head spin. She would pull back, leaving just my swollen cock head between her lips, swirl her tongue around it, then glide back down its length again and again. God, she was sooooo good. After a few minutes Amy said, "My turn honey, save some for me." as my sister and Audrey switched positions. "Hum me a tune Amy." I said in eager anticipation. Amy took over on my shaft and guided my hard cock between her sexy pouting lips. My sister has a way of making a moaning sound when sucking cock that sends vibrations through your cock. As she works her head up and down, she has this way of getting it all in a rhythm which always sends me over the edge in nearly no time. "I want to cum on your tits!" I groaned. As I approached orgasm, she and Audrey both got their sexy breasts down near my cock as I exploded cum all over them. "Aaaaaahhhhh, fucking A!" I moaned. I came with such force, a stream of hot cum shot up and hit Amy's face, landing the corner of her lips and right cheek. They both laughed as my white hot cum kept shooting long streams all over their sexy tits. I never came so hard or long in my life. Five huge spurts of cum flew all over their sexy white tits. They both rubbed my cream, into their tits and began to lick it off each other, sucking each other's nipples with a vigorous lust. God, it was such a hot and sexy sight as my sister's tongue rolled my cum over her best friend's nipple, pulling both into her mouth. After I caught my breath, I said "God, you girls are good. Audrey, it doesn't bother you that Amy is my sister?" I asked. Audrey said, "Well you know my brother Dave? He likes his cock sucked by his little sister too. Amy and I talked about doing something like this for weeks now." I looked at my sister Amy, who gave me a very hot erotic and sexy smile. To me, she's the hottest chick on earth and now Audrey ranks a close second. Both girls began to do a slow strip tease for me, shedding their suits in a very erotic manner. They both turned in unison and slid their swimsuits over their sexy asses, exposing two of the hottest naked butts imaginable. They slid their suits down those long sexy legs and kicking off their suits onto cement surrounding the pool. As they turned, I couldn't help but compare each of their pussies, both very sexy in their own way. Both neatly trimmed but Amy with a small amount of light colored hair and Audrey with a fair amount of dark black hair. Amy said, "Audrey, slide your butt onto that top step." Audrey did as my sister Amy asked. As Audrey sat on the top step, my sister and I got between her legs and went to work on her pussy. As I said, Audrey has this thick black pussy hair, which is very neatly trimmed for bikini season. Her pussy lips kind of stick out and her clit is very easy to find. We took turns sucking her pussy when Amy moved up to her breasts and I kept eating her pussy. "Oh yessss Ronnie, suck my pussy!" Audrey exclaimed while she pushed her mound into my face. The next thing I see is my sister's sweet ass hovering over Audrey's chin as Audrey was sucking Amy's pussy while I sucked hers, what a sight. As I brought Audrey to orgasm, she slowed eating Amy's pussy, arched her back and let out a mild scream as she came. "Ohhhhh my Goooooddddddddddd!" As Audrey's pleasure subsided, she said, "Your turn Amy. Spread those sexy legs wide for us!" Amy sat on the top step and again I shared the pussy-eating role with a woman. I watched as Audrey showed me some new techniques on eating pussy, as obviously she wasn't going down on her first girl. She was doing so good by herself that I decided to move up to Amy's perfect breasts. My sister Amy can have an orgasm with just the right amount of attention to her nipples. The combination of Audrey eating her pussy and me sucking her nipples, she reached an intense orgasm very quickly. Her body trembled in the throes of orgasmic pleasure as we got her off. "Aaaaaahhhhhhhh!" Amy panted as her hips twitched and shook with Audrey's mouth still attached firmly to her pussy. Man, that Audrey could suck pussy as good as any man, maybe better. Could this be why her and my sister were such good friends? My cock was aching as it was again hard enough to put a hole in the pool wall. Both girls knew of my fetish for a woman's butt so they both knelt over the steps and stuck their perfect asses out to me. Amy looked over her shoulder and said, "How's this look buttman?" as they both laughed. "Go ahead, fuck us from behind!" exclaimed Audrey as she wiggled her ass at me. "I've got to be dreaming!" I said as I took in the exquisite beauty of their perfect asses. I could see both their pussy mounds from behind as I first got behind my sister and slowly entered her pussy. As I my cock slid forward into my sister's pussy, I reached over to Audrey and caressed her pussy from behind. I slowly slid into my sister to the hilt and just stayed there a second while I worked two fingers in and out of Audrey's pussy. "Fuck me big brother, give me your hard cock!" my sister Amy cried out. I drove my cock deep and hard into Amy's pussy, her soft butt flesh hitting my thighs on each forward thrust. She moaned with pleasure as I rammed my shaft into her, again and again. After a few minutes of pounding her tight pussy, Amy commanded, "Give Audrey some of that big cock of yours!" I then moved over, slid behind Audrey and slowly entered her. She was shaking with lust as I fucked her real slow, with Amy's encouragement on how she liked it. As I fucked Audrey, Amy slid under her and was licking at my cock as it slowly went in and out of Audrey's pussy. I could feel Amy's tongue touching my shaft as she licked Audrey's clit. This was too intense for me as I reared back, drove deep into Audrey's pussy and came with such intensity I almost passed out. Even during my orgasm, I picked up the pace, my thighs slapping against Audrey's soft ass, gripping her hips firmly as I pounded her cunt from behind until she quaked with an intense orgasm. "Ohh fuck yeahhhhhhhhhh!" Audrey moaned as she shook with pleasure. "God, you two girls are going to fuck me to death yet!" I barely panted out. My cock was somehow still hard as I watched Amy lay a towel on the side of the pool and lay on her back spreading her legs wide. Audrey encouraged me to slide between her legs and fuck my sister for all my worth. "Fuck her Ron, fuck you sister like the slut she is!" Audrey said laughing. "Beg for it sis, tell how much you want my cock inside your pussy!" I said holding my stiff member in my hand standing over her. Amy had this look of pure lustful desire in her eyes and responded, "Come on big brother, ram that big cock of yours in me! I need to feel you deep inside me, pleassssse!" I just smiled as I moved over her sexy little body, her legs spread wide, ready for my entry into her hot love tunnel. As I slowly entered her pussy, she wrapped her legs around my waist. We began a slow hard grinding fuck as I pulled all but the head of my cock out on each outward movement and then drove deep into her grinding hard into her clit sending pinpricks of pleasure throughout her body. We gradually increased to a fast hard driving fuck. I was pounding into my sister's cunt when she began to suck on and breathe into my ears, which drives me wild. All while this was happening, Audrey watched as she fingered her clit madly, getting off on seeing a brother pleasure his sister, thinking of her brother Dave and how she decided to give in and finally let him fuck her. My sister then started to show signs of her nearing orgasm as her eyes rolled back and she bit her lower lip. I continued to drive hard and fast into her. A few seconds later her body tensed and her cunt felt like as vice, squeezing my cock as she climaxed with a multiple orgasm which seemed to last forever. "Ohhhh myyyy fucckkkking goooddddd!!" Amy screamed. Just seeing Amy in that sexy state of pleasure sent me over the edge again. Audrey also came under the stroking of her expert fingers. God, this so fucking hot and intense. I couldn't believe our little incestuous secret was now known to someone outside of us. I was so turned on that Audrey had an incestuous relationship with her older brother too. This taboo sex is simply so sexually arousing, everyone should try it at least once. After my sister and I were done, we were all sexually exhausted so we sat on the steps together naked and finished our beers. As we talked, both girls kept gently reaching over and stroked my cock, getting it hard again and again. We just talked for close to a half hour about what just took place. "Man, that was so fucking hot! You two never did this together before?" I said as I chugged down a gulp of beer. Amy replied, "Nope, you're our first threesome. See Audrey, I told you he was good." "Real fucking good, both of you. You two know just how to please each, kind of like I know what my bro likes." Audrey said. After about 30 minutes to finish our beers, we got dressed and went back to the house. We then went up to my sister's bedroom and the next thing I knew they were in a 69 going at it again, sucking each other's cunts for all their worth. I sat and watched as my cock was soon hard again, we then did it all over again. What a night to remember, a hot threesome with my sexy sister and her best friend. Sister's Step-In I always hated my sister, Mekayla. She always received the most attention from my mother in college. She was always getting the newest fashions and accessories from mom - and I, her twin brother, had to buy off the sale racks. I always ended up doing all of her chores, too. This always happened, and it made me angrier and angrier until I finally cracked. One day, when I was vacuuming her room, I found one of her newest outfits laid out on her bed: a navy blue top, pleated short skirt, sky blue tights and matching pumps. As I seethed with more frustration, a strange idea popped into my head about wearing her clothes. I quickly shoved it out of my head, disgusted with myself for thinking of it. But then as I was cleaning, I got to thinking of mom and how she always seemed to treat women a lot better than men. Maybe wearing the clothes would help with that. So I quickly finished the chores, stripped my clothes, and slipped into Mekayla's. The feeling of the silky tights and the soft fabric of the blouse and skirt against my bare skin sent feelings of pleasure coursing through my body. Looking in the mirror after putting on the pumps pushed me over the edge as I saw how sexy my round ass looked jutting out like that. My hard-on was threatening to stain the clothes, so I quickly released it from the tights and jerked myself off with more fervor than ever before. I spewed what seemed to be gallons of my spunk into my hands, which I then licked off with my tongue. I quickly cleaned up before my sister and mom returned from one of their shopping sprees. This continued for some time, the outfits always changing, making the experiences even better. But one day I got caught. Apparently, Mekayla had suspected me of trying on her clothes, so she set up a hidden webcam to record the room while she was gone. And, sure enough, she caught me in the act. I dressed up in a little black dress of hers, opaque gray pantyhose, and her Mary Jane heels. But she didn't even need the webcam; she and mom walked in on me as I was jerking off. Right as I climaxed, I saw them in the mirror, both with mouths agape. Then my sister started laughing her head off. I looked down at my dwindling erection in shame. My mom was sure to just kick me out now. But instead she just said. "This... is... Perfect!" My sister just stared at my mom. "What?" She and I said simultaneously. "You can't be serious. Your son has turned into a perv, and you call this perfect?" "Yes! You were just complaining to me how stupid it was that you couldn't go to the biggest party of the season because of your huge college test! Look at Mike here: he looks almost exactly like you in those clothes. He can take the test for you, and you can go to the party!" It was sad, but true; I had nearly no muscles to speak of, and I was always teased for the fact of my lack of height and my femininity. Mekayla looked at me, pondering mother's words. Then her eyes lit up as she realized that I really DID look a lot like her. "Oh my God," she said, "It's true! It's like we're identical twins!" "Wait, no!" I objected. "You can't make me do this!" "Of course we can," My sister said with a wicked, sexy grin. "I've got that entire stunt of yours on webcam, and if you don't go to college as me, that video will. Your choice." I gulped. It really wasn't worth it to be embarrassed by a video like that. "Don't worry about it," Mom said. "We'll tell your college that you are sick with the flu for a week, and we can use that time to prepare you for your debut. I'll take you out shopping, get your hair done... Everything we need to do to make you look genuine." That did it for me. My mom was finally going to pay more attention to me. I believed anything was worth that chance. "Alright," I said, "I'll do it." "Excellent! I'll go to the store and get you some starting clothes to wear. Mekayla, you help him in hair removal and... some other things." She winked as she said this and left to do her shopping. Mekayla did not look happy about this. But the chance of being able to attend the party allowed her to keep her composure. "Okay, if this is going to be successful, you need to do what I tell you to do, exactly how I tell you. Got it?" I nodded. "Okay then. Take off your -- I mean my -- clothes and get in the bathroom." I returned the lingerie to her room and stood in the bathroom, waiting for my sister. I heard her rummaging around for something, and she finally came in with a can of hair removal spray. "Use this like it says on the back," she said. "I'll be back in a minute." I hopped in the shower after the water had heated up. It said to apply liberally to desired area. I figured that meant everywhere but my head. I applied the spray and rubbed it into my skin. Soon after, Mekayla opened the door and entered into the tub... naked. I cringed; I never had seen my sister naked before. She had sweet nipples that just begged to be touched. They were very perky and gave her a nice hourglass figure. No wonder she was the hottie in college. "Don't blush, I'm just your sister," she said, scoffing at my face. I only became more embarrassed. She had a razor in her hand, and she started removing the hair on my arms and legs. She then moved on to my ass and cock. I softly moaned as the sensations caused my dick to stir. Mekayla noticed this, and caused torment to me by teasing it with her touch. She even licked the tip of its pre-cum. She didn't go any further, though, and quickly finished the task at hand. I was hair-free in all areas except for my head. She quickly dried me off and inspected her work. "Yes, that will do quite nicely," she said. She then grabbed my cock and said, "Follow me." She had never acted like this before; it was like she wasn't my sister. We entered into her room, where she disappeared into her huge closet and rummaged through. I stood there in my nakedness, anticipating what she had in mind. She returned holding a pink bra and panties, opaque white tights, and a white blouse with a pink miniskirt. She also had black curved toe pumps in hand. "Put these on, as sexily as you can." I was still surprised at how she was treating me. I did as I was told. I slowly pulled up the panties and tights, letting my tongue show to enhance the sight. The bra, blouse, skirt, and pumps came next. I made sure to let as much of my body show as possible during the process. After I was done, my sister reached into my bra and inserted silicone breasts. I suddenly could no longer see the tent in my skirt. It made the sensation even better having this new weight on my chest. She then turned her attention to the tent in my skirt. She pulled up the skirt and down the lingerie to find a cock straining to get even larger after being released. "My, it seems you like this more than you're letting on, brother... Or should I say SISTER now?" She giggled as she teased the tip with her fingers. It was true; the feel of the tights on my newly shaved legs was absolutely astounding. I wished I could have thought of it sooner. As I came closer to releasing my juices, she suddenly stopped and retrieved something from her drawers: a dildo. My heart skipped a beat. "Oh, no. Oh nonono-" "Oh, yes," She said with a quirky grin. "If you're going to be dressed as a woman, you're going to be treated as a woman. Now get on your hands and knees, slut!" Now I was getting a little scared. So I did what I was told, for fear of repercussion. She lifted the skirt and pulled down the panties and tights far enough to show my virgin ass. She lubed up the dildo and pressed it firmly to my sphincter. At first it resisted, but then it gave in to the pressure. I moaned in both pain and pleasure as it reached places I never knew I had. Within a few minutes, my erection was at full blast, not hindered by the dress any longer. It soon let loose a constant stream of cum onto the floor. She pulled out the dildo, covered it in the cum, and ordered me to lick it off. I did as I was told. "Good girl," She said as I licked off what was left. She replaced the tights and panties over my now-pained ass and cleaned the dildo thoroughly. Mom finally arrived home and inspected Mekayla's handiwork. "Great job," she said, "but now it's time to make you transform even further." She blindfolded me and had me sit in a chair. She applied some semi-permanent glue to the silicone breasts, makeup to my face, and a wig to my head. When I was released from the blindfold and looked into the mirror, I thought I was looking at my sister. She stood by me, and we looked exactly like identical twins. "Oh wow... I can't... Oh wow..." My sister said in disbelief. She stared at the reflection for what seemed like hours. I couldn't believe it myself. I looked... beautiful. For the next few days, I was assigned the task of mastering a voice that sounded like Mekayla's. Also, Mom had bought me a maid's outfit, complete with apron, black opaque tights, and three-inch Mary Janes that I was to wear around the house in order to get used to walking in heels. Mom and I went shopping several times to try out my new feminine self, and I wasn't surprised to see that I got lots of stares from the boys. I could only imagine what they were thinking as I swung my hips wearing a short jean skirt, nude pantyhose, and pumps. My Mom expressed her approval several times. Each time my heart soared, making me think even more that this bargain was definitely worth it. Every day started out with a shower involving getting a thorough cleaning from Mekayla. And every day also included a session of dildo sucking or butt-plugging. I hate to admit it, but I loved being treated as a female slut would. That might have changed had I known why at the time. On the last day, Mekayla woke me from my slumber with her usual morning orders. I hopped up and headed for the shower. Mekayla walked in, looking slightly sheepish as she carried in the special hair-removal soap. "Uh, Mike?" she said. "Please, Mekayla, if I'm going to get used to this, you need to call me by your name." By now, the "Mekayla voice" had become a habit, and we sounded almost exactly alike. "Sorry. Listen... Uh, I have something I need to tell you that I probably should have told you a long time ago." "What's that?" I asked suspiciously. "Uh... Well, the real reason I was using the dildo on you... Well, it's because I've... kinda been... "Servicing" this guy at college to get better grades, you might say. And the day you happen to be going to fill in for me... Was one of our appointments." "Oh, you gotta be fu-" "Please, don't have an outburst. Look, I know this has been hard enough on you already, and I'm really, really sorry that this has to happen. It's just that if you don't, then he'll do something that will keep me from graduation. Please, I really need you to do this. Sister to sister." That took me back. This was the first time that Mekayla had actually acknowledged my transformation. How could I respond to this? Before I could think, my mouth blurted out, "Of course I will." Mekayla squealed with joy as she rushed in to hug me. "Oh, I must find a way to repay you," She said. I said nothing, but returned her embrace. We entered the shower and did our usual routine. It was losing its novelty, so my cock only twitched at Mekayla's touch. She already had my outfit for the day laid out: a dark blue minidress, light blue stockings, and navy blue flats. I was grateful for the break from high heels. She pulled out the dildo once more after I had gotten dressed and had my makeup applied, only this time it had a strap-on. "I want to make it as realistic as possible this time," She said as he put it on. She turned on the vibrator and offered it to my mouth. I accepted willingly, sucking every inch out of the half foot. I had become quite professional in the art, and it didn't take long for my erection to start staining the panties, and I quickly pulled them down to prevent further stain. I moaned around the cock as I imagined it was the cock of the teacher at college that I was to suck off just the next day. But before I could release my load, she pulled out and moved to my still tight ass. She quickly inserted the vibrator, and my prostate quickly received transmissions of pleasure as it was touched by the plastic. I was near to cumming, but before I could, she pulled out yet again. Aww, now what? I thought. She removed the dildo and told me to stand up. I did so while she kneeled down in front of me. "I think I know how to repay you," she said as she grasped my erection in her soft hand. She licked the tip of my pre-cum, generating an instant response. "Wha... uhhh..." I tried to ask what she was doing and how morally wrong this was, but it just felt so good as her tongue glided up the length of my erection. She gave me pleasure like I had never felt before. Then she let go of my cock, got on all fours, and pulled her own dress up, revealing her beautiful hips and cheeks. She offered her hole to me. Without conscious effort, I glided to where she was and inserted my she-cock into her awaiting hole. Our feminine grunts and gasps filled the air as I pounded her ass with all my might. I exploded into her hole, spewing so much cum into her that she began to leak. She dutifully licked up what had dripped and licked off my erection. She then stood and shared my cum with me through a deep, lesbian-like kiss. I had never felt this way towards my sister before -- it felt so wrong. But she had shown love to me in a way I never thought possible before. Maybe that is how real sisters feel, too.