Your back home for the holiday's , and tonight are alone with your older step-sister on the sofa. You two used to have an inappropriate relationship growing up, and she comes onto you, trying to get you to fuck her. But your in a relationship now, and reject her. She knows exactly how to turn you on and seduce you, she knows you can't resist your step-sister's buttcrack! She reminds you of the old times when you used to jerk and cum into her buttcrack! As she gradually pulls down her pants , she teases you about how much better she is than your new girlfriend, and how you'd rather jerk into her asscrack than fuck your boring new girlfriend. She shows her bumhole and begs you to cum into it! She sucks your cock whilst you see her ass from behind, then she turns round and you explode between her cheeks!