I've got her on her paws and knees in bed and I'm mounted on top of her with my cock as deep inside of her as it'll go. I'm exhausted already because my stamina is shit, so I've switched over to grinding my hips into her. Maybe I lean over her body so I can start kissing her on her neck and shoulders when she turns her head as far as it'll go so she can say what she's been dying to try out all night. It's right when I've hit that special spot that she groans out, "please be careful, I'm not on birth control."
Of course that's all it takes to get me going again. I tangle my fingers into her hair and shove her face down into the mattress and put my weight against her head for leverage. I'm slamming my hips against her ass with each thrust like if I fuck her hard enough I could actually get her pregnant, like I could somehow breed her through the strap. And she's taking it like such a good girl because she knew this would happen. And as she gets closer and closer to cumming, she starts feigning panic. "No, no don't cum inside, please it's not safe, please don't breed me," and more filthy lines that only manage to rile me up more until she's squirting all over the blankets and collapsing in her own mess.