Well, you have to decide how to manage her.. She's not going to get help on her own... And right now she's how old?
It's VERY HARD to undo conditioning that extensive...
I am just thinking strategy wise if you want husban'ds support again getting some sort of managable arrangement with his mother is your strongest card to play...
I think if he sees you working iwth his mother he's a lot mroe likely to cooperate with you... make sense?