Damn, my twin sister was beautiful. I had this thought as I swam behind her in swimming practice both using our kick boards. Her butt was rock hard and her legs were beautiful and athletic. She was petite and her back was lean and tanned. Her breasts were small but that did not matter to most guys as she was that friendly and pretty that most guys looked passed that. We were 15 and we were not overly worried as we still had time to grow and our bodies to full out as our mom said. I myself had looked at my friends and was satisfied with my penis. My length was average but like my dad,s was thick. I was at least twice the thickness of my friends and when hard was in my friends sisters words an impressive dick. Coach called me over at a break and asked how I felt. "not so good coach,a little tired" coach had noticed my head was not in the game and told me to rest and climb out the pool. I needed to wait a minute for my hard on to go down and once it did I climbed out the pool and hit the shower. As I waited for my sister my cousin Renay came over and told me she was taking my sister and I home after practice as she was staying at our place to take us to school the next day. I remembered then that our parents had a function and would not be home till late. My cousin was 16 and my sister and I had always been tight with her. We had all played "Dr" together and we had no secrets with each other. As I looked at her I noticed that she and my sister were almost 1 person, the only difference been that her breasts were slightly larger. My cock started to grow and I shifted my body to release my cock that had been caught under my leg. I was getting super horny after the thoughts of the day and when my sister walked over to join us and go home I stood up and started to walk away. I felt their eyes looking at me and I knew they had seen my erection. It felt good that 2 of the hottest babes at school had seen my erection. By the sounds of their giggles and red faces when I turned around I must have made an impression. Walking into the house my dad called me over and told me to listen to my cousin but still make her feel protected along with my sister. I went to my room and all to soon was saying bye to my parents. I decided I was going to hit my punch bag before supper and asked my sister to call me when supper was ready. I noticed a green salad on the table and that a chicken was in the oven. I hit the bag for what was I thought was a short time but was in fact half a hour. I was hungry and caught myself wondering why my sister had not called me. As I walked into the kitchen I could see that the food was ready but the girls had not sat to eat yet. I looked for my sister in her bedroom with no luck and then heared soft moans from the lounge. Mmmm must be watching TV I thought, as I opened the door I saw my cousin grinding her pussy on my sisters hip while sucking her tits. My sister was ramming her finger into her tiny pussy while twisting and pulling on my cousins tits. My cock grew with a urgency I had never seen and I decided to clear my throat to let the girls know I was there. As my cousin turned round to see who was there I dropped my pants and let my cock free, my sister just stared at my cock and I asked if they liked what they saw. My cousin came over and grabbed my cock and pulled me hard towards her, as she did she grabbed my balls and sucked them into her mouth. She let them out of her mouth and told me she was in charge and I was not to say anything to our parents. I looked at my sister and all I saw was lust in her eyes. My cousin told me I was to blame for their "play time"as they could not forget my erection from swimming practice. I grunted as my cousin hit my balls and I quickly replied I would not say anything. I stared at my sisters tits and she walked over and asked me to suck one, I took the right one in my mouth and started licking,sucking and biting for all my worth, my sister let out a loud moan and I raised my head to see my cousin licking my sisters tiny pussy while fingering her clit. I shifted from my sister and started rubbing my cousins pussy, she was soaking wet and I inserted my finger working my finger all the way to the knuckle. She was now working her pussy on my finger and was moaning louder and louder. My sister joined me and started sucking on her tits, my cousin was getting louder and wetter and was now bucking on my finger. My opened her eyes and looked at me and under her breath told me she wanted to fuck my cock. As I pulled my finger out my sister grabbed my cock and started wanking me. I moved in position and lifted Renay onto my cock. "gently" she said. I slid into her slowly, she was tight even as wet as she was. She moved her hips and I went further until I could feel my balls slapping against her pussy. I slowly rocked my hips and Renay soon joined in my rythm. I buried my head into her chest and started sucking her nipples. I felt my sister playing and squeezing my balls and groaned to let her know my pleasure.my cousin was now bucking and getting faster in pace. My cousin looked me in the face and pulled me to her and kissed me roughly, as I broke for breath I saw my sister with 2 fingers in her pussy and bucking quickly in rytham. I was going to explode and quickly pulled my cock out as cum started to leak out and land on my cousins stomach. The big one landed on Renay's left nipple as I pulled my hard thick cock, the next loads came quickly and sprayed all over. I fell to the left and saw my cousin gush fluids over the carpet still fingering herself for all she was worth. My sister came over and buried her face in my cousins pussy, as she lapped at her pussy and tasted her juices I stood up and inserted my middle finger in her tight swollen pussy. We had all decided to play again, but this time it was much more fun!!