SA, I wouldn't tell advise your h that you are going to have your own lawyer review the documents. You need to have your own counsel in this matter because you need someone fighting for you!
If the papers come, accept them and then turn right around and provide them to your lawyer. Allow your lawyer to notify his lawyer and then they can do the negotiating, etc. I would never use the same lawyer for something like this.
No matter what happens, he's not going to be happy, but at this point....do you really care? You, and only you, can protect your family and what you need to do in order to live on comfortably. He's not thinking rationally and you have to be the one to think things through.
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.