You've been sad and angry ever since your Step-Father re-married. Kicked your Step-Mommy out of the house and marrying his hot slutty secretary who seduced him, a homewrecking whore. Your new Step-Mom. She knows you hate her, but she doesn't care. You're a loser just like your Step-Mommy. She has Step-Daddy's inheritance and she can kick you out of the house whenever she wants. You're under her control. She knows you perv over her, even if you hate her. You can't deny your new Step-Mom is hot. She orders you to jerk your little pin dick watching her body, listening to how she seduced and fucked your Step-Dad behind her back. You can't help but be turned on and pump your cock, until you do a little squirt of cum. And don't think hot new Step-Mom is cleaning up your mess, that's what your mouth is for.
Later that night you hear them both fucking, and you can't help but watch, even when you're caught, you love the sight of that whore bouncing on him, getting her slutty pussy filled with cum.