Yes, I feel if H leaves (to live with his dad), he will get the single life too, what he wants. He can still be the good dad, and see them, but then free to do what he wants, without me 'snooping' around behind him.

You are right in some ways for sure about letting it happen, since it would happen anyway. My situation is a little different because OW is married, so the 'family' activities were pretty much halted when the A was discovered.

I hope it gets old quickly for your W, you deserve so much more!