Need advice for a WW who left

[dwh15]

HELP!! WW calls me this afternoon in tears. She got in a huge fight with OM and is moving out. She is out of town the next 2 nights with a friend but I know she is thinking she can just move back home when she returns. I haven't agreed, and told her I thought it was a bad idea, but she got defensive and said I couldn't keep her out of her own home. Now legally, no idea where I stand at the moment. I'll be checking with my attorney first thing tomor to verify whether I have the legal right to refuse her living here. Since there is no official D filing or separation agreement yet, not sure how that all works.

But my bigger question is really: is it a good idea for a possible R in the M? I can tell that she's deeply hurt and still has strong feelings for OM. In fact, he gave her the Love You But Not In Love speech - oh sweet Karma. I may not even have a choice but to let her back, at least temporarily, but curious if anyone had input on best way to handle it, assuming that's where I end up. I know sometimes people live together as roommates and are able to still work on things. It's not what I wanted, and I was totally unprepared for something like this. Any and all feedback appreciated.