You come home to find your step-sister's bedroom door shut. Sounds like she's got that hot friend over again but she tells you not to come in. You know they're trying on lingerie together so you ignore her and come to watch. They're both annoyed at you and tell you to leave, but you've got other plans. You tell them you've got something to show them and take out your new "brain control" device. All of a sudden, those sluts aren't trying to get rid of you anymore, but actually want you just as bad as you've always wanted them! Your cock gets so hard watching them get so horny they can't keep their hands off each other. And when you decide it's time to join in, there's no complaints either. Well, almost. The device clearly doesn't work perfectly, and they each keep slipping in and out of awareness, but their momentary reluctance in between slutty desperation for your cock just makes it all the more exciting...