So about that extra ticket.... But seriously I've found to just be supportive to her and try and stay out of it as much of you can.

Sounds like a ploy to get you to think your wife is in Chicago with a heartbroken friend, and not another dude (which seems more likely). I'd stalk her friend and make sure she's not really at home covering for your wife.

Yes, I think the course of action is a BFF sandwich.

Then the next time you golf with the guy say "you know what's really cool, fun and exciting? a foursome, minus a girl's cheating husband"

I've made it a habit not to say a word about any issues that my friends (or my wife's friends) are having with their significant others. Been burned too many times in the past by trying to console someone saying that they are better off because the person that they were with was a douche and that I never really liked them anyways...only to have the person reconcile and now I look like the asshole.

I really think Con Alma needs to opine on this thread. I want to /Con_Alma but I can't get the words right.

Update...

Dude is leaving town. Helped lady-friend move. Putting in the hardwork for the inevitable BFF sammich.

Indeed.