Over Hearing My Step-Sister Fuck Her Man Really Turns Me On. I was about to head out when I heard some grunting and moaning coming from my step-sisters' room. I gotta admit whatever was going on in her room sounded like it was a lot of fun, it really turned me on. Later that day I ran into Vina in the kitchen, she must of just got done having sex cause she was sweating and all bubbly coming into room. She was wearing the sexiest lingerie under her robe,...