Why is he responding to your lawyer? Do you know if he's being represented by a lawyer? Yes, it costs each and every time your lawyer has to look at something or respond to something concerning your case. Lawyers see this kind of stuff all of the time and if the lawyer is a good one, they can pick up on what's going on very quickly and get to the heart of the matter and do the proper fighting for the client.
It's going to get ugly because he's not going to take on his share of the debt, nor is he going to want you to have anything more than what he was willing to give you a while ago. You are going to have to stand firm and do not negotiate any deals w/him w/o your lawyer reviewing them first. In fact, it's better if the lawyer handles everything and then you aren't subjected to the nasty and ugly behavior that your h is displaying right now.
It's going to be a tough ride, so strap yourself in and be prepared to stand your ground.
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.
