She likes it when I fuck her ass and fill it with cum

Every time I fuck her ass I have to cum inside. She won't let me cum somewhere else. I can't cum on her tits, face or pussy, it has to be on her ass. She tells me that she likes how it feels to have her guts stuffed with jizz and that if I ever think of taking the dick out and cum on her back, she would never let me fuck her ass again. Easy decision, when I see that ass waiting for my cock, I would not risk losing it for anything in the world.