I think you have gotten good advice so far and I am going to add this.
This is actually forward movement in the tunnel as much as you may not like it.
The MLC'er needs to believe that the marriage is totally destroyed to progress in REPLAY.
So yes it would be better to embrace this rather than fight it. I am not saying to not see a lawyer. Most definitely go see one ASAP Protect yourself as best as you can cause the saying that things might get worse before they get better is always an axiom.
Yes you are going to be in PAIN, that is part of his fuel so he can keep moving and thinking that ESCAPE and AVOID is going to save him. It wont. But he must learn this on his own