Ok man, I'm gonna stay with you the best I can to help talk you off this ledge (sorry, bad metaphor). Right now, you are speculating....do things look bad...maybe, maybe not. If its a bomb drop, then you must be able to pick up the pieces from there man. Remember, she is insane. end of story. They all are. As far as custody issues, etc., do NOT panic. Trust me on this one, I have a bar card too.....
Another point to ponder, how many people have we read about in the books and otherwise who have dropped the D bomb and recovered? Maybe she needs to eat a little sh*t before she can truly see what she is doing. Sometimes it takes hitting rock bottom before things can turn around. Keep these things in mind!
Now, obviously you aren't going to be able to contain yourself when she walks through the door, but please do your best. I think it is fair (others will probably damn me) to ask her about it. Take it from there. If it is a bomb drop...do not go off the deep end...remember your actions today will have great impact on tomorrow. If it isn't then breathe a sigh of relief, go wash your face with cold water and re-assess.
Keep with us!!
"Achieve success, but without vanity; Achieve success, but without aggression; Achieve success, but without gain; Achieve success, but without force." Lao Tzu