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.
Hunt for toxins expands ... Phasing out Regents ... Early voting and what you need to know ... Out East: 'Grape' time of year