My sister had a party and did not invite me

While our parents were away my older sister had a party and locked me in my room

Friday night our parents had left town and put Sofia my older sister in charge. After dinner she got me in my bedroom and removed the door handle. She had me trapped or so she thought.
Her friends arrived there was a lot of music and moaning and other noises.
Three o'clock in the morning it got very quiet. I got a pair of scissors put the end in the hole where the square rod goes and turned it. The door popped open.
The first thing I noticed were clothes all over the floor.
I found several pairs of pants with wallets in them and $20 from each wallet. not enough to be noticed.
I also found a number of bra and female underwear. I put them in my room Let them go home without any under garments. Scattered was quite a few empty wine bottles, premixed alcohol cans and beer cans.
In my sister's room I found Sofia naked in the arms of her friend George. On the other side of the bed was her friend Tammy in the arms of Sofia's boyfriend Steven. All four of them showed signs of recent sex. Including the cum leaking from Sofia and Tammy's cunts and smears of cum on their faces.
I had a bit of fun with my sister's and Tammy's breasts I sucked on their nipples then I gently lifted each breast by the nipple and released them to watch them wobble around.
In our parent's room two more couples shared their bed. Lily and Pam were in there, Lily had the smallest breasts of all the girls here, but I loved her dark coloured nipples.
While three couples were laying around the lounge room. Sandra this nice friend of Sofia's whenever Sofie's friends visited she was always the nicest to me. Seeing her naked on her back I could see what a great set of tits she had. Her legs were spread open and her cream pie pussy was in view. I had been thinking about jerking off in my sister's face. But I suddenly came up with an even worse idea. I got undressed and got on top of Sandra and fucked her. Here I am at 15-years old and fucking my first girl and she 19 and a friend of my sister's I started kissing her face and breasts as I fucked her. I felt myself cum inside of her and pull out. I kissed her on the lips and then walked away. Kate was laying on the couch with Ryan. She was right on the edge. I was getting hard again I positioned my cock near her arse and lifted her leg I then poked it through her legs and guided it to her pussy. Once in her I used my hips to fuck her. As I fucked her, she started kissing Ryan.
Then I got my phone and started taking pictures of breasts pussies and cocks with a thumbs up beside the two pussies I had fucked. To remind myself that it really happened. I took hold of nipple and lifted breasts to take pictures of that and videos of boobs moving around.
I was sporting another erection when I walked into my sisters' room. I looked at Tammy and thought about fucking her on the bed next to my sister and then I thought about fucking my own sister. I spread her legs when I took photos of her pussy and now, I climbed on top of her I slipped my cock into her cum filled pussy and fucked her. She was moaning under me, and I could hear her saying, "Steven, oh god Steven, yes fuck me, Steven." I kissed my sister on the lips and face. Then I kissed Tammy as well. It was at this point I remembered the smears of cum on a few faces and chose to ignore that and keep kissing the girls. I thought about going down on a pussy but that was going a little too far as every pussy had been fucked and cream pied.
In the end I went back to my room and closed the door hours later Sofia opened the door and gave me some breakfast. She was completely dressed I came out of my room to shower and use the toilet. Sofia's friends were looking everywhere for their underwear. I saw Sandra bending over to look under a table and caught a glimpse of the pussy I fucked early in the morning.
Steven told me he would give me $30 if I picked up all the bottles and can from around the house, and an extra $10 for each piece of female underwear I found. I picked up all the bottles and cans and returned with a bag full of bras and nickers I found in my mother's underwear drawer. So, I cheated sue me.