I'm really glad you called your Dad's wife and your brother. That was a good thing to do and I'm very proud of you. Do follow-up and call your sister too. And don't let too much time go by before you call your brother again. Stay connected.
I've told you a hundred times that your W really hasn't faced the true test of being on her own. Sounds like her family is telling you the same thing. She has so much to learn and figure out for herself. Time will teach her about life's realities because no one else can. Keep plugging away and your situation will get better. A word of caution...the more desperate she becomes, financially and otherwise, the bumpier this ride will get. When she feels trapped, she will lash out. Try and get yourself as financially stable as possible so that you can fend off her attacks. And you will be attacked. Sorry.
Hugs, Spitfire
Always do right. This will gratify some people, and astonish the rest. Mark Twain