She was still living at home and my parents both thought that even at 21 years old, she was a virgin. I, and of course Matt, both knew differently an... it was this thought that was driving him wild. He was still a virgin and was saving himself for her in the misguided belief that she would calm down.One night she had brought home another one night stand to our flat and after she had fucked him royally in my room where she had reached a deafening climax that drove us to increase the television. He immediately reached out and cupped them in his hands, pinching the nipples, making me moan like a slut."You like it rough, don't you girl?" He twisted my nipples until I cried out again."Yes."He twisted them again. "Say 'Yes, Sir' slut." Yes, sir." Get on your knees."I dropped to my knees on the rough concrete as he unzipped his pants and withdrew his thick cock, hard and purple with need."Suck it bitch."I opened my mouth and hungrily sucked him in, running my tongue over his veiny shaft,. "Yes it is," I told her, "I think I am going to feel it a bit strange to find myself being a brother after all this time." It seems funny to me too, because I will have an unexpected cousin, who will also be my sister in law," Rebecca said with a laugh."I had never thought of it like that," I said with a giggle, "It makes it all sound like a bit of a weird relationship" It fits the pattern for our two families" Rebecca giggled. "No one would have expected you and me to end up like this. Then. ” “Ok, “ I said stupidly, “Your welcome?”She laughed and grabbed my hand and lead me up the stairs. We got to her room and she closed the door. “Take off your clothes, its pay back.” I started to protest and she laughed and said, “Listen pervo, I have a plaster cast of your boot print and I will call the cops if you do not strip, now!” she said this with a smile, but I was not sure, so I started to strip. Soon I was buck naked. She looked at me and said “Jerk off, make yourself cum for me,.