[Sylvanfan]

I think you need to read Dale Carnegies book, How to Win Friends and Influence People. Even if it's only 4 days a week, a young child is a relentless responsibility that can be hard on anyone, especially someone who may not be getting a lot of help from other people on those days. When she's venting to you or your parents, probably just looking for someone to let her talk about herself for a bit and vent.

Most of us are selfish, we love to talk about ourselves, but can't be bothered to care about listening about someone else, without immediately dismissing it as whining or "psychotic" behavior. Try putting yourself in her shoes and be willing to listen.

As much as you think you are a magnet for crazy women...the common denominator is yourself here.