Sam's sister, Becky

"Well now, what's going on here?"

I looked up and saw Sam's sister walking down the stairs. I was surprised that Sam kept fucking even with him sister standing there watching us. Of course I was even more surprised that his sister was standing there butt naked.

"Hey becky" Sam grunted.

"It looks like you're having fun" she said as she took a seat on the chair opposite us. "Did you get bored of me?"

"Wha…UUGH" I moaned.

"Oh? He didn't tell you?" She said "me and Sam have been fucking each other for a while now"

I couldn't believe what I was hearing. She had been fucking her own brother, I had no idea. However, I could say a word, I couldn't even think straight. I just moaned uncontrollably. It just felt…so…good…oh…

"I'm gonna cum" I moaned "OH GOD, I'M CUMMING…AAAAUUGGGH"

My body twitched and writhed in pleasure as Becky just sat and watched my orgasm. Knowing that made me feel so kinky. After a few moments the feelings of pure bliss subsided. I realised then that Sam was still fucking me furiously.

I began to grunt with each of his thrusts as he fucked he harder than ever before, **** to fill my cunt with his seed. Just when I thought I was about to start screaming, his sister spoke up.

"Let me do it" she said as she got off her seat.

She walked over to us, her amazing tits bouncing, swinging her sexy hips. i was relieved when I felt Sam pull out, and the viscous fucking he was giving me ended. I collapsed onto the sofa. I felt totally spent and humiliated and my mind told me this was wrong. But when I finally flipped over and took in the sight of the two naked siblings I knew that my body needed more.