You are caught jerking off to a creep shot of your step-sisters armpit and she catches you! She freaks out humiliating you and tells you you have to jerk off to her feet or she will tell! You start jerking off to her feet, but she really needs to pee so you have to hurry up. she takes her shirt off exposing her armpit for you to see and her tits as you jerk off, but you're still too slow! So she jerks you off. She ends up peeing her pants anyway and since you both are already turned on she encourages you to cum on her face!