Confront man who put the moves on your wife
Depending on his reaction to this confrontation, I could imagine it clearing the air and then being able to resume a friendship (after some extreme awkwardness).
Either way, if he decides to go on this trip, you should go too. At this point, watching him like a hawk is definitely called for.

Sarra Sounds Off, Season 3, Ep 5: Top football teams in action and Nassau soccer playoff picks Gregg Sarra sounds off on Wantagh vs. Bethpage and Ward Melville vs Sachem North, plus Michaeil Sicoli has his Nassau soccer picks, an update on the high school fantasy football standings and the plays of the week.