Your kids and protecting your family financially are the No. 1 priority. I'm afraid some of our spouses do some really crazy stuff and you can't control them, but you have to keep their destruction on the other side of the door. It isn't normal to separate children like this.
If you think she is a risk to herself or the kids, you may need to think about asking for mental services help.
Me: 53 H:38 T:20 M:14 BD ILYB etc 10/15, H diagnosed severe depression S 1/16 PA 4/16 H filed 1/17
