"that's between your dad & I to work out, we both love you very much, you'll always have both of us in your lives every day, none of this is your fault. Sometimes adults just can't compromise on really big issues"
then when H tells the kids something designed to be hurtful to me. I say:
"it's unfortunate that he chooses to draw you into our adult relationship. It's not your responsibiity to fix. It's sad to me that he feels that way, you're going to hear a lot of things in the next few months, not necessarily the truth"
then when they ask "where are you going to live, where's dad going to live, what's happening to us"
I say:
"I'm not sure on all the details, but we're not taking you away from your school, friends, or environment. No matter what. Also, I hope that we'll close enough that you can ride your bike back & forth every day if you want."
Lastly. Be strong for them. They need to know that someone is in control of the chaos. Even if you have to fake it.
Doc says the farm animals all watch each other. If some of them are losing it, the others think they should be losing it too.
hope that helps
M 19 years, MC for 8 months, DB'd for 8 months 4 kids; 18, 15, 14, & 10 I was never meant to be a doormat. It took me years of therapy to become assertive enough to stop his abuse.