I really feel for Smarmy's wife. Do they have kids? Do you think she knew of the affair? That is just SO sad.
But now your ex might pressure him into M. Heck - if she marries him - you'll definitely be off the hook for alimony. But you know - with all the changes going on - he might just bolt.
Divorce sucks. All the way around. But especially for the kids. Hope yours are doing ok.