I'd assume what she is doing is using you for her own reasons. You don't have to lend her anything. I know plenty of people who don't lend tools b/c they may never get them back and it's true. Sounds like you have a good reason now.
If she drops by, it's hard to just ignore her since y'all have kids. Let it roll off your shoulders like water off a duck's back.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.