So again, you are the calm in the storm. All of that mess is theirs, let them own it. I am sorry that money apparently means more to your MIL than family. Those are her choices, not yours. See everyone gets to make their own mistakes, you are not obligated in any way to own them.
As far as your H and bankruptcy, make sure that you aren't on anything with him, because that will come back to you. I know with your legal separation that protects you to some degree. Double check all of that again.
Sometimes I wish we could just turn the darn soap operas off because they seem to be the only thing on. Chin up. I am rooting for you.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory