I think I can stop this.... can you help me?

[2thepoint]

Fitz I would not worry about your W's outbursts. I know it is hard to ignore but you have to disengage emotionally from her right now. She is confused and looking for justification for her decision to ditch you and the marriage. Don't give it to her. Stick to your guns on not moving out. Keep your cool but set boundaries. Tell her something like, "I'm happy to talk to you about whatever, but if you are going to scream and be ugly, then the conversation will end.". And hold to that!

You really do need to keep your cool. She is provoking you because she needs to be certain that you are the cause of all her unhappiness. Don't fall for it. Show her a happy and content Fitz as much as possible. Oh, and if you haven't yet consulted a lawyer, do so soon.