I've been trying to get my wife to fuck her ex for years now. Two years ago he wrote her a letter (delivered to her parent's house) asking that she meet him over a cup of coffee. I immediately let her know that I would be okay with that (and more), but she claims to have no interest in doing so.
I want to lay face up with her in a 69 position and him fucking her doggy stile. I could see the underside of his shaft near his balls contract while he's cumming. When he's done, he could pull out and she could sit right down on my face.