You have received some fantabulous advice. I haven't been on much lately but your post struck my fancy so I am responding. Take it for what it's worth and please don't think I am trying to be a downer. I read some of these threads, have flashbacks, and sometimes wonder whether I should chime in or not.
Nervous breakdown? Same thing with my xh. Several people including himself thought he was having one. I have never seen anything like it. Your w is angry...very angry so while I do agree you want to validate her feelings, don't get sucked into this horse caca. And that is what it is...Caca.
Your W is completely and totally irrational. Don't engage with batsh!t. It is a fruitless and painful task. Worry about yourself and your kids. I know you love W, however, only she can decide to truly get help and I can tell you she is a loooooooong way from being done. I don't say this to be a doomer, however, I have seen enough and read enough to know this is probably the truth. It's like when someone's BD was 2 weeks ago and they label themselves in piecing. They. just. aren't.
My xh told me through sobs that he had no idea (and this is a direct quote) "how I could function being so logical." Something tells me this is something your W would say.
Protect yourself financially. Let her decide to work through her stuff...or not. You be the best Jer and focus on being the best mom. Your little peeps need a stable figure in their life.
Hang in there:)
3 kids BD 12/15/13 (IDKIILY. ) Rope dropped Cirque du Soleil style D final 9-9-14 "Some people are born on 3rd base and go through life thinking they hit a triple." Barry Switzer