First of all I live in an Arabian country so I live in an apartment in a big city with mom, dad and my sister, who is two years younger than me. She had a nice tanned bronze skin and round firm boobs and a hot round ass. I have seen her naked when we were younger, we used to play doctor patient. I usually pretended to be doctor and we would put a doll under her clothes. I used to examine her pussy closely so that would give me a hard on.
Later, and after some years, I would usually get super erections by just looking at her while she is fully clothed. I used to grab her boobs and touch her ass until one day she was punished for not using the pc for a week. I was out and when I came back their was no one in the house except her and she was using the pc. I walked in on her and I got an idea!! I threatened her by saying I would tell our parents, she asked what I wanted in order not to tell anyone. I made her promise not to tell any one about what I will ask her to do and she AGREED.
I told her to lay on the bed and spread her legs then I started to cup her boobs with my hands and slid my hands under her shirt. She was wearing no bra. I felt her hard nipples and massaged her boobs. She was enjoying it then I slid my hands over her panties which were so wet and stroked her pussy lips from outside.
After that I exposed her trimmed pussy and stroked her clit until she breathed heavily and then she had a DESTRUCTIVE orgasm which left my hands sticky. Then she said to me that she is going to do the same. She got my seven incher out and she explored it. I taught her how to jack it off and she was a quick learner.
She was jacking at a good pace and I could no longer resist cumming. I launched six or seven hot ropes of cum on her boobs and chin as she was very surprised! Then we cleaned up. We did it two or three more times.