Your little sister is such a stuck up prude... Or at least you thought so. You wake up to a video that her ex-bf sent, and its just too good to keep to yourself. But instead of telling your parents you come up with a better plan. She can either fuck you or get kicked out. She fights it the whole time, telling you how sick you are for wanting to fuck your little sister. But she gives in eventually and lets you fuck her in the ass. You can tell she loves it but is trying to hold back the whole time. She can't help it though, you thrust your fat cock all the way in her and she lets out a huge moan...