My step-sister Marsha thinks she can do whatever she wants. And I guess most of the time she can get away with that with other people, but not with me. The other day I got home and saw her using my weights. She knows I workout the same time every day. And my step-sister never even works out anyway. I know she was just trying to fuck with me to get my attention, but I didn't get mad, I decided I'd just fuck with her right back. I started grabbing her butt and her boobs. I was fingering her a minute later. She tried to stop me but I knew she wanted it. In the past month I've caught her watching ...

My step-sister Marsha thinks she can do whatever she wants. And I guess most of the time she can get away with that with other people, but not with me. The other day I got home and saw her using my weights. She knows I workout the same time every day. And my step-sister never even works out anyway. I know she was just trying to fuck with me to get my attention, but I didn't get mad, I decided I'd just fuck with her right back. I started grabbing her butt and her boobs. I was fingering her a minute later. She tried to stop me but I knew she wanted it. In the past month I've caught her watching me workout like four different times and lately she's always trying to use the bathroom while I'm taking a shower. I'm not stupid. I know what she wants, she's just been too afraid to actually ask for it. Well I decided to finally give her what she really wanted. I've wanted to fuck her for a long time now but I never tried anything because I figured I'd get in trouble. I'm moving out soon so I don't care about that anymore... I showed Marsha what a real workout is like. I always knew my little step-sister was a slut, but she's my slut now, and I'm pretty sure she'll only want to workout with me from now on.... ***Starring Marsha May***