He's riding the fence...he wants someone else to take the responsibility for his actions. If he waits on his wife to instigate the divorce then he's not going anywhere for awhile. Do you really want to spend energy that could be best spent elsewhere waiting on this guy? You've got 2 kids to think of now, live for them.
I get 2 different lines of what he is going to do back and forth.
Know it well. You've got a long road ahead of you, but get as much information from this site & others to determine your best course of action. Of course no one can tell you WHAT to do, only opinions. Having "been there done that" I can appreciate how you feel, and like I said earlier, I hope he proves me wrong. Doesn't sound like he will so far tho.
SK