As a long time married woman with kids, I agree with those who have suggested counseling. She doesn't sound finished at all, but rather very emotionally unstable. If you think you could get past this in your own mind, reconciliation would probably be the best course for your kid (assuming she doesn't have a history of such unstabe behavior). I think this situation won't last much longer, one way or the other, and I think if there is no resolution in a couple of weeks, you should put your foot down.

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