As I guessed it, she is back in the other room tonight. Given the fact that things seemed to have been getting better and there was not one specific event that happened to get her to go back into the other room, why not ask her what changed? It can be done without arguing or being accusatory. A simple, "can I ask you a question? Why did you go back into the other room again."
M 37 W 36 T22 M14 D8 D4 8/2012 distanced BD 11/2012 (likely wants D. Feelings have changed.) W move out date: June 8th.