my step-brother and I are having an all-nighter together, watching movies, playing games, and messing around, when he starts to get tired. I playfully bounce on him to keep him awake when I feel something hard under me, curious, I start grinding my hips on it, trying to figure out what it is. when I realize he has a huge boner, I get embarrassed and confess that I've never seen on in real life before. he shows me and then tells me since he showed me his, I have to show him mine. so he asks to see my butt. I show off my ass and wiggle around for him and then tell him that it felt good bounci... Show more