Your step-sister wants to borrow your car and she knows she's going to need to trade something in return. Maybe if you hadn't been staring at her so much she wouldn't have caught onto your perverted fantasy. Now she's going to use it against you to get what she wants. This is going to be a fun game. I wonder how long you'll have to cum. She knows how much she turns you on and she's probably a little into it too. Why does she keep leaving her door open at night when she masturbates? Jerk your cock as your step-sister instructs you to.