if your bills are caught up. start using your own money to buy your own survival supplies. if the SHTF you may want to go it solo, because she will hinder any forward progress made by you. if you have kids, make sure they are supplied too. but leave her ass out. start showing your kids survival methods and make sure they can follow directions. seems like wife and mother in law are in it for themselves. fuck them. there will be plenty of strange to replace her with.