ok, but don't lay down like a lamb if at all possible.
The thing about situations like this is that the abused (that's you) becomes uber compliant, decent, honourable. Probably to even up the balance, as the abuser (that's him) is breaking all the rules with a breathtaking charm. But your compliance/decency/fairness is all part of the abuse: he has got you in a vice. It's a nasty trick. So far, so narc.
So you don't have to do a 180 turn right now, just chip away at NOT being decent, honourable, fair, compliant. He is not fair, he has no intention of being fair, he intends to win - and he will go to any lengths to win. Really, ANY lengths. Nothing is too low for a narc.
He will use the kids. Not just in general machinations - of course he will do that - but in ways that will harm them, emotionally, psychologically. Proper harm, not imagined lightweight harm. He harms because he is a narc.
I appreciate the teetering on the edge of a nervous breakdown, really I do. It's ok for me to spout from my 'high' place (ha! destroyed place more like. Kids destroyed too) because I'm no longer in the thick of it, it's over for me. But I can look back and wish I had done things differently.
Get in touch with eg Rights for Women. That's the legal arm of your rights. We have to do something about this travesty of justice (lorded over by the male-dominated judicial system. In my DA support group there were a large number of abused wives of judges, barristers, police officers etc) and perhaps we have to do it as a group? Each of us is so beleaguered and terrified - the most important thing in the universe is at stake: our kids - that we can barely function let alone take on a daunting cause like this.
Perhaps we could get a journo onto this. Or an MP. Both are looking for causes to support to make a name for themselves . Poster above whose friend in london's ex was awarded custody despite documented abuse - she could take her story to the press. Saturday Guardian, Family (as a starter).