You've had enough, time to pack up and leave this sexless marriage. As you're packing up, your step-daughter enters the room and asks if we're going on an early vacation. You explain that you're leaving because you're not sexually satisfied. She's upset, and a little grossed out, but she's desperate for you to stay, so she suggests that maybe she can help. You've never looked at her that way, but after she says that... Well she's a younger, hotter version of your wife, with bigger tits, and a much nicer ass, and really eager to make you stay. Let's see how eager. She gets on her knees and pulls out your erect cock, saying that you should close your eyes and think of someone else doing this to you, but nothing is going to keep you as rock hard as the sight of her trying to stuff as much of your cock in her mouth as she can. Having been neglected by your wife, you're ready to blow already, but you want to see how far you can take this, so you tell her a blowjob isn't enough. You need more, you need to fuck her. You insert yourself into her already wet pussy and start slowly and gently fucking her. Her boobs bounce as you thrust harder inside. As she starts moaning more and more, you can't take it anymore, you have to pound her pussy from behind. When you tell her you want to fuck her doggy style she smiles and says "yeah, of course step-daddy", the perfect obedient step-daughter. Her grippy pussy slides around your cock, her ass bounces against you, she stops trying to stifle her moans, and she asks if it's weird that's she's making these noises. You reassure her that it's okay, as you start fucking her harder, trying to get more of those sweet moans out of her. After she cums on your cock, you want to cum on her face. She's surprised by your request, but she wants you to stay. She gets on her knees, slurps her cream off of your cock, and coaxes every last drop of cum onto her face. Happily glazed in your cum, she looks forward to keeping you satisfied.