Your step-sister has come to visit, and to use your pool for the day, you're in your room and getting changed. You noticed how hot she looks, is that a new bikini? She asks you if you mind her getting changed in your room, but you don't mind at all. You're getting harder and harder for your step-sister, and she can tell. Her husband calls, and she reassures him she will be home soon, but not before your step-sister gives into her most taboo desires, riding her step-bothers cock.