Nathan Bronson suspects that his stepsister, Lilly Bell, is kind of nuts. He decides to set Lilly up by letting him borrow his car since she has dressed nice and slutty to ask. Later, Lilly wants to borrow Nathan's credit card. When he tries to say no, Lilly peels off her shirt to show him her tits and offers to let him touch her pussy. Little does Lilly know that Nathan has gotten another step closer to what he wants even as she struts off with his credit card. When Lilly gets home, Nathan finally gets to cash in on his nice guy act when she tries to show off her sexy new outfit for him.