I think it's a good idea to take space, and a lot of it. That's what I did when my sit was spiralling- sort of like cocooning yourself to protect yourself.
Try to get away from H as much as possible. Try not to talk about anything other than logistics and the kids. When he veers into chaotic territory or wants to talk about AP - politely but firmly shut it down. "I do not want to talk about AP". If he persists - leave the room or the house for awhile if you can.
Take this time for youself - figure out what it is YOU want to do. What H wants to do right now is irrelevant. He is crashing and burning - let him crash and burn.
