I've followed your threads intermittently over the past 2 months, and I may have missed something.
Have you found a good attorney? I know that I am only reading what you post, but it sounds like your W is not in a very good place to be the primary parent if your M continues to go south. Nobody wants to exclude the other parent in these kinds of situations, and I'm not suggesting that, but the kids' interest might be better served if you had primary custody.