Tell your husband to quit. If he and his clan have any sense at all, they should start packing their bags now. South America makes a good hiding place and they accept dollars in most supermarkets.
Your in-laws may have a stubborn streak but they are no martyrs. Men who sleep on feathers do not willingly fall on their swords.
It is over, run before the angry crowds tear you and your family apart. I'd really hate to see you on the front cover of Vogue again, dressed in black.