Your stepsister comes home from work a little early and hears some strange noises coming from stepmom’s bedroom. She slowly walks toward her door to see, to her surprise, stepmom having sex with you, your stepbrother and her very own stepson! What the fuck! stepSis is taken aback, not knowing what to do as she hears stepmom moaning and dirty talking. As sick and twisted as this is, she does get a bit turned on, and sneakily starts to masturbate as she spies on stepmom and you. Once you guys finish, she sneaks away. Later that night you go to your stepsister’s room to borrow something and she confronts you about what she saw earlier today and even though you try to deny it, it’s no use. She assures you to not worry though, because she won’t tell anybody, but she does want what you and stepmom have. That’s right, she’s a bit jealous that stepmom gets you all to herself, and since we’re stepfamily, we should all share! Your stepsister wants to join in on the taboo stepfamily fun, but she doesn’t want stepmom to know. She likes the idea of sneaking around with her stepbrother, just like you’ve been sneaking around with stepmom!