You treat your step-mom like dirt. You don't help around the house and you are rude and inconsiderate. Your step-mom has had enough of your behaviour and says you are grounded you so you can't go out and see your friends. You don't listen much, but your step-mom has got you mad at her. You are 18 and shouldn't need to respect your step-momma anymore. You are a big man now! You don't know why, but your step-mom gets too close to your face and it gets you angry, so you push her away. She comes back, so you push her again. She threatens you... so you push her again. Suddenly, your step-moms demeanour changes and she becomes visibly turned on at you acting so dominant over her. Could your step-mom actually LIKE you pushing her around? Does she get a wet pussy when you assert dominance over her? Oh yes she does...