I haven't got any sage legal or kids advice for you today but I do hope your talk goes well. It is actually a very good DB'ing opportunity, I think. You get the chance to state your case calmly but firmly to H and make it clear what life will be like "single". For some reason I have noticed that MLCers think they are leaving their responsibilities when they leave but surprise! now they have court ordered ones. Let him feel the weight of that.
A little earlier on your thread you said that you wanted H to feel one of these days his mistake but not in a vindictive way. I agree with you. I really believe that they are not "out of the tunnel" until they realize exactly what they have done. I don't see that as wishing for punishment but hoping for some kind of enlightenment.
Maybe in your financial discussions, some of that light will penetrate.