It looks like he wants to accept that bet. Why don't you pull him out?
Oh, you have a wife and you can't cheat on her? It wouldn't be cheating if you just rubbed him a little bit through your clothes would it? You're not touching me and we're the only two people who'd know. I won't tell anybody, I've lost all my money so I have to do pretty much anything you say.
See, that's not so bad is it? You're still being a good boy.