Your W's relationship with D14 reminds me a lot of the one between my W. and D17. They were cut from exactly the same cloth, and therefore, neither one of them can either admit fault, and the words "I'm sorry" are in neither of their vocabularies. I have a feeling it will get worse between them before it gets better.
By the way, good for you for standing your ground with her, just sa you did when she insisted you were "bad parents". She cannot have it both ways. Your girls are at a very difficult age for all of this. They know nothing but an intact family. How does she think a divorce will make them less dissappointed?