You creep into your step-sisters room without her knowing and to your amazement, shes masturbating.. but she has a cock!! She notices you and freaks out, embarrassed hiding her big cock. She first denies she has one, but you took a video of her so you threaten to blackmail her unless she shows you it. You admit it kind of turns you on and she teases you for finding your futa step-sister's cock hot. You're a little embarrassed to get yours out seeing as how big yours is and she teases you for having a smaller one. You wank together and she tells you to wank her cock like she is doing hers, s... Show more