Cheating on Girlfriend with Step-Sister

Your girlfriend is pretty, but I'm a better fuck. I want you to fuck me and think of me every time you fuck her, step-brother. I've seen the way you look at my ass, even when she's around, you're lucky she hasn't noticed. I'll make you cum harder than you ever have. I want your cock and cum, I want it every night. Fuck me, step-brother! I want you to cum in my pussy.