If she comments again about the fact that she has moved out of the bedroom, I might say something like "If you decide you want to move back into the bedroom, there will be some conditions we need to discuss" and leave it at that.
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015