Since your step-dad left, it's just been you, step-mommy and your step-sister. But things at home have taken a turn, your step-sister has become feral, completely out of control. Her behavior is getting worse, and step-mommy begs you to help, after all, you're the man of the house now. You think of ways to make her more submissive and respectful, she comes home late after a party, and you decide now is the time. She starts to talk back to you, so you grab her and spank her. You keep spanking her until she gives in, submits. And it turns you both on. Your cock twitches and she notices. Dropping to her knees and worshipping your cock. She promises she will be a good girl, but you have to fuck her into obedience. Step-mommy is thrilled with how things have been going. Your step-sister seems like a brand new person. So well behaved and polite. She asks what your secret is, but you don't tell. You just want her to call you a good boy, and she does. Stroking you, praising you. It doesn't take long for the situation to become tense, you're both feeling the sexual tension. Step-mommy hasn't had cock in so long, and it doesn't take much for her to become wild with lust and desire, your cock stretching out her wet pussy whilst she bounces on. She tells you that as long as you keep your step-sister under control, she will keep rewarding you. Your step-sister heard it all, she's jealous. She wanted to be the only one who was fucked and filled by you. She teases you, telling you she's going to be bad unless she gets what she wants. And she wants your cock. Step-Mommy comes into your room, your step-sister exhausted from riding you. She's shocked. All this time you've been fucking her into submission. But she's not mad. She's actually turned on. This is the new dynamic. Everyone wins. And your step-sister watches, lying in bed next to you whilst you get sucked and fucked once again by step-mommy.