Note: This story was dynamically reformatted for online reading convenience. Well the third Sat. of the month had rolled around again and I was sitting on the couch awaiting the arrival of my sister and my two nieces Tammy (10) and Tracy (7). I had agreed several months before to watching the girls when my sister had to take her turn on the night shift at the local hospital. Every third Sat she had to work the 11pm to 11pm shift in the O.R. This had been going on for several months and I really enjoyed having the girls over for their monthly sleep over. This month was a little different though. Normally my wife would be home to help with the girl stuff. (You know the bathing, getting them ready for bed and the like) this week my wife was also going to be out of town at a convention in Atlanta so I was going to be fully in charge of the two girls. My sister and I had discussed it at length and decided that the girls and I would get along just fine! About 9:30pm the door bell rang and my sister and the girls came in. Both girls carried their overnight bags and rolled up sleeping bags that they would use to sleep on the living room floor. We had a spare bedroom but they liked to sleep on the floor. They said it was funner that way. I greeted them all with the normal hugs and kisses then my sister hugged both girls and told them she would see them Mon. morning. She would always leave them the extra night because it was usually midnight or later before she could get to my house on Sun. and we figured that it was just as easy to let them sleep over that night also. Tammy and Tracy were three years apart but looked so much alike it was uncanny they looked like twins. One was just younger and smaller. Both girls were slender built with long flowing golden brown hair, Greenish eyes and adorable smiles. I loved the two of them and got great enjoyment when they were over. Well my sister headed out the door waving and saying be good for Uncle Dave and have a good time. I knew they would be no trouble, both of the girls were very prissy and neat and really didn't need much attention. Shortly after my sister had left Tammy asked if they could swim for a while before they got ready for bed. As usual I told them yes, (this was the normal routine.) the girls quickly scampered off to the bath room to change and I headed for the pool. I was already in cutoffs and didn't have to change. I had just set down on the lounge chair when Tracy came out wrapped in a towel crying her eyes out! I asked her what was wrong . She proceeded to tell me through the sobs and tears that her mom had forgot to pack bathing suits. I wrapped my arm around her waste and told her it would be OK we would think of something. I went back inside and headed for the bathroom to talk to Tammy I knocked on the door and Tammy said come in. I opened the door and Tammy was standing in the middle of the floor with nothing on but a pair of light pink panties. I had seen both of them in panties many times and even naked many times over the years. This time it seemed a little different though I stared at Tammy for a second looking at her soft brown skin, her tan lines and most of all,the puffy morsel between her legs. Her little hairless pussy was puffy, rounded and her panties had slipped comfortably between the folds. It was a beautiful; sight. It was erotic. Quickly I regained my composure by telling myself that she was 10 and also that she was my niece. I quickly gave her one more quick glance admiring her tiny brown nipples that had just recently started to form on her soft white chest. I looked at the two girls and said how about if we don't turn on the pool lights and you guys can just swim in your panties. Both girls paused for just a second and said "would that be OK." I told them that it would be just fine. And reminded them of a few years back when they had played on the slip and slid in the back yard in nothing but their panties. The girls grabbed their towels and headed for the pool. As I came out the door I flicked the pool light off. It was a nice moon light night so in all reality it wasn't very dark. I sat down on the lounge chair and watched as the girls splashed and giggled in the pool. Every so often on of them would get out and run in front of me before jumping back into the warm water. Watching their tiny bodies run in front of me in those wet panties really started to get me excited. The panties left little to the imagination. The clung tightly to every crack and creavas it was truly on of the most beautiful and erotic sights I had ever seen. I soon developed an erection but figured as long as I was sitting down the girls wouldn't notice. As I sat there slowly rubbing my pulsing member and watching those perfect little bodies prancing around the pool I realized that I was truly getting turned on by these two little girls. I figured I could set quietly rubbing my dick till I shot my load in my pants then excuse myself to go in and clean up. Just when I didn't think it could get any better Tammy got out of the pool and stood directly in front of me her pink silky panties were completely transparent. I could see everything in the moon light. The cloth clung tightly against her puffy pussy mounds and were deeply embedded into the fold of flesh that protected her tiny vagina. I think Tammy noticed me checking her out because she kinda smiled and gave me a quick impish pose so I could get a real good look. Tammy smiled again and then said watch me dive Uncle Dave. I watched intently as she turned and proceded to dive in head first into the pool. It was almost like slow motion as I watched her tiny ass lift up into the air her tiny body slowly sink below the water line. As I watched her disappear below the water I also watched her panties slide off her bottom and down her legs. I got a great shot of her ass crack and even a quick glance of her hairless pussy as she sunk under the water. When Tammy came up on the other side of the pool Tracy and I were both giggling (she had also seen her sisters undies slide off) Tammy looked a little embarrassed but I quickly assured her it was OK and that she really didn't need them on anyway. Tammy smiled and said "OK" Tracy quickly asked if it was ok if she took of her panties also. I told her that it was up to her! She quickly stripped them off and threw them on the edge of the pool. For the next ten min or so I watched intently as those two beautiful little girls frolicked and played naked in front of me. My dick soon was past the point of just being hard it was now a pulsing, raging tower of hot flesh. I watched their tiny bodies intently and to make things worse Tammy would intentionally come over to talk to me squatting down and spreading her legs just enough for me to see her tiny hairless pussy. Sure enough that little girl knew what she was doing and she was teasing me with the sight of her soft pink pussy. The girls started begging me to get into the water and swim with them. I was a little reluctant because of my stiffy but after several min. of coaxing I decided that the water might relax my pulsing member. I quickly stood up and dove into the pool. No sooner than my head had come up above the water than both girls yelled take off your shorts. I kinda looked at them and said I don't think that is a good idea your mom wouldn't be happy if she found out that I was swimming nude with you girls. Both girls quickly said that they wouldn't tell and continued to coax me into removing my shorts. I guess they got the best of me and I reached down and pulled my shorts off and threw them onto the pool deck. For the next few min. things were alright the girls started splashing me and we were having a good time. I watched their naked silhouetted bodies glide through the blue water. My pulsing dick was not getting any softer but I didn't seem to mind as much now that I was in the pool. Then it happened Tammy started swimming under water right at me. I knew if she saw my stiffy she would start asking all kinds a questions but just at the last second Tammy's head came up out of the water. The next thing I knew she wrapped her arms around my neck and then her legs around my waste. I felt her soft naked skin touch mine and nearly exploded with excitement. Then it happened Tammy started sliding down, I could feel her pussy sliding down across my stomach nearing my erect pulsing member. I quickly reached around her and grabbed her tiny ass but it was to late, her tiny pussy had come in full contact with my throbbing dick. To make it worse when I grabbed her ass to stop her I had spread her tiny cheeks enough to allow my dick to separate those puffy little pussy lips and come to rest directly over her virgin hole. I hadn't penetrated her but her pussy lips had wrapped tightly around my erect penis. The feeling of those tiny lips wrapped around my dick was to much for me and before I could lift her up I began to spew. I could feel the hot juices pouring out of my dick , squirting up into her virgin hole and all over the lips of her tiny pussy. Even though I wasn't inside of her I knew without a doubt that the force of my exploding juice had filled her pussy with the sticky juice. Tammy's eyes got as big around as half dollars and her legs wrapped even tighter around my waste. Tammy had a smile on her face and she whispered "did we just have sex?" I shook my head no and whispered back to her that I had just gotten to excited and that her beautiful young body had made me spill my seed. I tried to lift Tammy off but her legs were wrapped tightly around my middle and she kept pressing her tiny pussy down tight against my dick. Even after shooting my load my dick didn't want to soften and the feeling of her soft thighs and pussy rubbing against me was keeping it engorged. I slowly slid my hand down between us and let my finger slide between her pussy lips. Tammy shivered just a little and I stopped she then whispered please don't stop that feels good. The sticky goo had filled her crack and made for some great lubricant I slowly started to rub her budding little clit between my fingers and within seconds I could feel warm juice pouring out of her tiny hole onto my finger. After several min. of rubbing her clit Tammy was shaking and quivering at my every touch. I wondered if I could get my finger into her so I tried. I was supprised how easily my finger slid in up to the second knuckle. I rubbed the inside of her vagina for a while then whispered "do you want to try real sex?" Tammy nodded and said she would like to try if it feels this good. As I wrapped my hands around her grabbing her ass firmly and spreading her butt cheeks and pussy lips with my fingers I explained to her what was about to happen and that it might hurt a little. Tammy said OK and that she was ready. I slowly lowered her down till she was again sitting directly on my stiff shaft. I squirmed around a little till I could feel the head of my dick slide between her soft pussy lips and find it's way back directly over the tiny opening that was her woman hood. As is let her slide down I could feel the tight skin start to separate and begin to engulf my throbbing member. I only had about half an inch in her when she started to lift up while telling me that it was hurting. I told her that it was the head opening up the way for the rest of me to enter and that it would feel real good as soon as the shaft got inside. Tammy said OK ands started to let herself back down again till the head was again about half way in. I could see by the look on her face that she wasn't going to last much longer with the slow lingering pain so I just thrust my hips toward her and jammed my dick in till the tight skin of her pussy had slid down over the head. When the head was fully in I stopped and held her close to me rubbing her back and not moving. I let her tiny pussy adjust to the size of my dick. After a couple of min. of not moving I could feel her hips start to move slowly. She had begun to try to get more of me in her. I just stood still and let her slowly work her way down then lift herself off. Within a short time she was taking about 2-3 inches if my throbbing dick into her tiny virgin hole. I could feel her hymen as she would lower herself onto me. When my dick would press up against it she would stop then lift back up. I knew I couldn't take it muck longer and I knew I wanted my dick buried clear to my balls in her tight hole. When I knew she was coming down for one more try I wrapped my hands under her arms held her shoulders and when I felt the resistance of her still intact hymen pressing against my dick I pressed down hard. I felt my dick press through the tender skin and just as she began to yell I pressed my lips tightly against hers and slid my tongue into her mouth. She couldn't scream because my tongue was down her throat and my dick was now buried in her tight little hole. I again held her tight and left my pulsing member sit still. I soon could feel her body start to relax and I slowly started to lift her up and slide her down my shaft. After a few times Tammy was beginning to move with me and I could feel her pussy wrapping tightly around my throbbing member. I had a firm grip on her tiny ass and was sliding her up and down my pole. It really wasn't like I was fucking her it was more like I was using her to masturbate with I had total control I would lift her up as far as I wanted and slide her down till my balls would smack against her soft butt cheeks. Tammy had her eyes closed and I could fell her tiny body shiver and tremble each time my member drove its way home. I whispered in her ear and asked her if she wanted me to stop. Tammy open her eyes and said oh please no it feel so good now. I held off as long as I could. I must have slid her up and down 100 times till I couldn't take it any longer. With one final thrust I buried my dick as deep as I could and let go of a torrent of steaming cum. I must have shot a quart. I could feel it rushing out the end of my dick splash against her cervix and then squeeze down along side my dick oozing out of her stretched pussy hole. Tammy was nearly sobbing with enjoyment her body was thrashing and she was squeezing my neck tightly with her arms. After I had shot three good loads deep inside her. I let her settle down onto my softening member. I held her tight letting her tiny pussy milk the last few drops of seed from me. All of the sudden the reality hit me. I had just fucked the hell out of my 10 year old niece. OH MY GOD !! what kind of a pervert was I. I started hugging Tammy and telling her how sorry I was and what I had done was wrong. Tammy lifted up her face from my chest, smiled and said "It's OK uncle Dave I really liked it and promise not to tell any body Really I promise" Well that helped me a little but I knew that she had to be a mess down there so I told her to go into the bed room and I would be in to help clean her up. I told Tracy that we were going inside for a few min. and that she needed to stay in the shallow end of the pool. That didn't seem to be a problem to me, she had been playing there quietly while I fucked the shit out of her 10 year old sister. I lifted Tammy off my now soft dick and set her on the edge of the pool. Tammy quickly got up and headed into the bedroom as I had asked her. I again asked Tracy if she would be ok for a little while and she smiled and said YA. So I quickly headed for the bedroom myself. As I passed the bathroom I quickly grabbed a warm wash cloth and headed for the bedroom. When I got to the bedroom Tammy was already setting on the edge of the bed looking down at her bald little pussy. As I looked down to examine her she spread her legs reviling everything to me. "Oh My God" her once tiny little pink hole was now a huge cum filled red gash between her legs. Blood and cum were oozing out and white globs of water soaked cum were stuck all over her pussy lips and ass. I started cleaning her off with the wash cloth trying to clean all the blood and cum from her the best that I could. I couldn't believe how big her hole was now but I guess it was to be expected after having my dick in her for 30 min. As I washed her crack and ass and got the goo and blood of off her things began to look better. I guess it just took a little while for her vagina to close up again after the abuse it had been put through. I was just finishing up when Tammy looked at me and said " can we do it again before I go home I really liked it when you had your winky inside of me" I did want to fuck her again but decided it was to soon to do her again and that I better let that little slit relax a little before I opened it up again. I smiled and said how about I make you feel good another way. Tammy looked at me kinda oddly and said what do ya mean. Whit that I pushed her knees apart and started kissing her flat firm stomach and then down to her bright red pussy lips. I kissed and tongued my way down till I had her pussy lips spread wide and was digging my tongue deep into her pussy. It didn't take long till Tammy was dancing on the end of my tongue. I probed her hole and licked her pea sized clit till she was thrashing around on the bed and little girl pussy juice was pouring out of her like water. I guess I didn't realize how long we had been gone because all of the sudden I heard Tracy's voice right behind me. "Uncle Dave I want to play to" OH NO what do I tell her and how much has she seen. I lifted my face from between Tammy's soft white legs and sure enough Tracy was right there watching the whole thing. I nearly choked trying to think of something to say when Tammy spoke up and said that it wasn't a game for babies. Tracy replied that if Tammy was old enough to play that she could play also. Tammy told her she couldn't play because she would blab to mom and then we would all get in trouble. I just stood there with my mouth open really not knowing what to say. Tracy said NO I WON'T TELL and I want to play. Tracy quickly jumped up on the bed raised her knees high in the air and spread her legs. There she was revealing the prettiest little twat I had ever seen . So tiny, so pink, so tasty looking. I couldn't help but want to lick it. I said you promise never to tell and Tracy said "Ya" so I knelt down between her little legs and started to kiss her stomach and work my way down till my tongue was sliding up and down her tiny pink crack. Before this all started I didn't know that little girls could cum but I soon realize that they can and the juice was pouring out of her. It was awesome I was lapping up her juices and driving her into a frenzy. Here was a 7 year old stuck on the end of my tongue and she was loving it. Her pussy was so tight that I couldn't even get my tongue inside but I sure could work her clit over . I started sliding my finger up and down her ass crack while I was eating her tiny bald pussy, Tracy was trashing around like a madman. I slowly pressed my finger against her puckered little ass and to my supprise it slid right in . I was licking her pussy and fingering her tight little ass and she was enjoying it. After 15-20 min of this I wanted to fuck something really bad. I wasn't sure if I could do it but I wanted to give it a try, I had decided to try to slip my dick into her tight virgin rectum. I never stopped eating her while I reached over to the night stand and got out a tube of KY jelly. I squirted a glob onto my fingers and began to spread it between her little ass cheeks making sure to apply most of it directly on and in her tiny ass hole. Tracy didn't seem to care what I did and just kept lifting her legs higher and further apart. Soon I was eating her and shoving two fingers as far up inside of her as I could reach. I couldn't take it any longer I had to try something. I quit eating that bald little pussy and stood up, I grabbed hold of her ankles and laid her legs on my shoulders I then reached down and grabbed her tiny hips and slid her ass toword me. As she slid close I placed my bell head directly over the puckered little brown hole. I again held tightly to her hips and slowly applied a little pressure. To my surprise and delight the tight muscle readily parted and allowed the entire head to slip in. Tracy opened her eyes for just as second and gave a slight grown of discomfort. I stood still for a second and Tracy again closed her eyes. I took this as a sign. Tracy wasn't crying or begging me to take it out in fact she had closed her eyes like she was waiting for the pleasure to begin. I slowly pressed against her again and my throbbing member slid in about two more inches. With about 3" up in her I could tell by the way her butt was tightening up that she was in a little pain so I slowly slid it back out till only the bell head was inside her. I slowly repeated my actions each time trying gently to insert just a little more of my throbbing member with each attempt. Tracy was moaning and breathing heavily but had never opened her eyes again. I whispered to her and asked her if she was OK Tracy just replied UhHu. I looked over at Tammy and she was just watching intently while I sodomized her little sister's ass. After several min. of this slow insertions and retractions I knew my balls were going to explode soon and I really wanted to be buried deep inside her when I finely did explode. I again held firmly to her tiny hips and started pressing a little harder with each thrust. Tracy was beginning to make some whimpering sounds but at this point I really didn't care. I slid my dick out till it was almost completely exposed and gave one mighty thrust. I jammed the entire 7 1/2 inches in her and didn't stop till I felt my balls slap against her tiny white ass. As I hit bottom Tracy screamed a loud scream but I couldn't stop now, I started pumping her for all I was worth with each thrust I would pull back on her hips and drive her tiny ass tight against my pelvic bone. Tracy was crying quite a bit and kept saying take "take it out take it out " for the next 8-9 thrusts then she began to make that moaning sound again and I looked down just in time to see her eyes close and a big smile come over her face. I wanted to shoot my load so bad but I bit my lip to keep from shooting for a while. Tracy had been put through a lot of pain and now I wanted to pleasure her till her tiny pussy gushed with little girl juices. I must have fucked her little ass for at least ten more min. Tracy was squirming ,moaning and juice was running out of her little gash like a waterfalls. I could feel the warm juice pouring out of her and running down my dick and balls. Then came the time I couldn't take it any longer I held her as tight as I could then jammed my self up in her one final time as my balls slammed against her tiny ass I unloaded a flood of hot sticky cum deep in her bowel sack. As I filled her ass with cum I could her Tracy as she just kept saying OHHHHH OHHHHH OHHHH After depositing I don't know how much cum up her ass I quit pumping and just left my dick deep up in her till I began to go limp while I rubbed her tiny clit with my thumb and watched her shiver on the end of my dick. As my dick grew limp in her soft white ass the reality struck me I had just filled both my nieces with spunk, how could I live with myself, how could I deal with the fact that I was a child fucker!!! All the thoughts were racing through my head when all of the sudden Tammy reached over and began to rub my balls while saying this is great Uncle Dave can we do this every time we come over? My tention eased a little aand I decided it was time to get the girls cleaned up and ready for bed.