Your step sister is a prude. She's always a bitch to you, and all other guys as well. She always wears baggy clothes, but you just KNOW she has a smoking hot body underneath it all. If only she were sluttier... Well, you've been working on a trick to make your fantasies come true. You enter her room one day, and she promptly tells you to leave her alone. But, with a snap of your fingers, her personality changes completely. She's dumb as a rock, a total airhead, bouncing and giggling. You snap your fingers again, and suddenly your step sister is only wearing a tiny gold bikini. She marvels at her new outfit, showing it off to you and bouncing her tits. Your step sister then remarks that she never noticed how hot her brother was. You've done it -- you've turned your step sister into a mindless, slutty bimbo. She pours baby oil on her tits for you, rubbing and groping them, then inviting you to grab them as well. Your step sister begs to see your cock, saying that it must be so big. You r