My biggest worry in all this is approximately $6k is going to be forked over by my parents for this whole Sh*tshow...2k for attorney and $4k to buy her out of the house.

if we R - then my parents are going to have so much animosity for her...

I guess maybe one of the conditions would be to pay back the $4k before she came home and if she didn't want to, then I guess it didn't mean that much to her in the first place.