Bea, I haven't had that experience and it has to be awful to have him show up with OW in tow. I don't blame your children one bit and I think it's going to eventually blow up and your children are going to tell him about it. He's really pushing the limit on this stuff.
I'm sure he'll blow up if he doesn't get his way, but he needs to step back and take those rose colored glasses off and realize you can't waltz back into people's lives after the damage he's done w/o making some sort of atonement. He really is still floating around Earth.
Bea, I don't think he's going to go back to sleep. In fact, I think he'll get worse before he gets better. He's on that train called "determined to get everyone's attention" and doesn't care if it's good or bad attention.
Bea, I am so sorry he's carrying on this way. I wish I had a solution for you and your children.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.