Fascinating discussion! I'm 50, very happily married, have no desire to cheat -- but I have to admit that I find my MIL (who is 72) very attractive, very sexy. She looks about 20 years younger than she is, and is in fine shape. Every time we have visited her, she somehow manages to let me get a brief glimpse of her in her bra and
panties. Is this just carelessness, or a bit of a tease? I honestly don't know, although it certainly gets me hard! My wife knows I find her mother attractive, even kids me about it at times -- but I'm sure she wouldn't want anything to happen. And I definitely wouldn't want to wreck my marriage! Still ... if my MIL showed any real interest, other than a vague tease (which could very well be my own imagination), I'd be VERY tempted to go for it! I think this desire is quite common among men.