(He just turned 60 and I wonder how it looks to his current wife??)

Anyway - focus on you and your kids and your life. He may or may not turn around. If he does, great - you’ve had a good time of renewal in the meantime. If he doesn’t - you’re that much closer to your new life.

The kids will test you, maybe even blame you, because you are the “safe” parent - they don’t dare say that stuff to him for fear of losing him. Stay strong and model how to move forward.