Your hot stepsister needs a favour. She wants to borrow your car to go to a party on Saturday. While you can certainly help her out, you are going to need something in return. It's nothing too crazy, you just want her to jerk your cock off with her feet. At first she is shocked by the proposal, but she quickly warms up to the idea and tells you to get your cock out so that she can instruct you to stoke while she teases you with her feet. She makes sure that you are rock hard and oozing precum before finally taking your cock between her soft soles. As she fucks your cock with her feet she talks dirty and encourages you not too cum too soon. She's beginning to enjoy the power that her feet have over you - knowing now that you have felt her feet around your cock, you are addicted. You'll do anything to have her stroke you with her soles again. She edges you for a few more minutes before finally counting you down. You unleash a massive load all over her feet, which she then licks off while smiling. She knows that your cock (and your car) belong to her now.