I'll Do ANYTHING to Stop my Step-Dad From Moving Out

Today my step-dad showed up randomly in the middle of the afternoon and rushed to his bedroom and started packing clothes. I went to go see where he was going, figuring a work trip or something. He ends up telling me that he has finally gotten up the courage to leave his wife, because he is tired of a sexless marriage. He explains that they never have sex, she has completely let herself go, and essentially he has just written his entire marriage off. I love my step-dad so much, and can't imagine not having him around so I start to beg. I tell him I know that I remind him of his wife when they first started dating, and that I'd be willing to fix where she has been lacking. At first he is very confused, and so I come right out with it. I offer to suck his dick. He doesn't agree immediately, and I have to keep convincing him. Eventually he agrees to stay at least one more night if I give him a blowjob. So I have him lay down and start to show him all of things he has been missing about his earlier years of marriage. I grab his cock, take out my perfect tits, and begin giving him a nice slow sloppy blowjob. For some reason he isn't cumming though, and he basically says the blowjob isn't convincing enough for him to stay! I will do anything at this point and so I let him know that he can fuck me if he wants. Well, he does, and I put on the best dirty girl show I could possibly do. I tell him to fuck me exactly how he likes, to spank me, and to cum wherever he wants because I have an IUD. He can't help himself, he gets really into it and eventually pumps my pussy full of cum. I knew I could get my step-daddy to stay for me.