You were just sitting in your bed when your stepmom came into your room and started talking about your girlfriend and the sex you had with her recently....so embarrassing! She seemed to think sex shouldn't be hard, or dry, or painful like it was with your girlfriend. It actually seemed like your stepmom was jealous of your girlfriend, but why? Oh! she wants you to fuck you! she says she will show you how it's suppose to feel! so you put your dick in and she tells you to cum inside her, its ok, she's your stepmom!