Your sister's hot friend is having a sleepover and she is staying at your home at night. Your sister is out to buy snacks, so you are alone with her friend. Out of nowhere she tells you that she knows about the very special relationship you have with your sister. What? No, don't worry, she won't tell anyone that your sister is also your girlfriend. But...she thinks you deserve a better girlfriend. Does she volunteer? Well, maybe she does! She starts teasing you with her big boobs, tight pussy and great ass! You become very hard, but you tell her that what's important to you is how good she is at sucking and riding your cock! Your sister doesn't have to know! She is so ready for this challenge! Are you ready to cum hard? ;)