Azzork is right. Will knowing really change the situation for you? You guys are already lawyered up, right?
This might expedite that process. Is that what you really want?
I'm going to disagree with Squiggy on one point, though:
If you decide to open that can of worms, I would not leave the door open for her... I wouldn't say anything about living in an open M etc. or giving her that choice to come back. It doesn't mean that you wouldn't, but think about how it makes you sound? I'm not just saying that for your sitch, either. I think that needs to be a general rule.
In your particular sitch, she's already taken some legal steps, so you know where she stands regarding your M.
