Don't try to make your H look bad to the kids. He's already done that himself and it would only make you look worse. I think you already know this though! But don't let him get away with blaming it all on you.
Your H is trying to be nice and toss you a bone b/c he feels bad about hurting you. Tell him to take his sympathy on shove it. But do it nicely.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.