I think this is a great idea. It at least opens the door to that possibility, a door that she may think is closed. I have wondered whether her dragging her feet in terms of moving into her "own room" has to do with her not wanting to have her own room in an official way, or has to do with you trying to make her do it.
You letting her know that you open open to an "our room" allows her that opportunity and removes the pressure.
OT, I had the same thought...but with the fish and all I did not have the opertunity last night. I will "open the door" today...
doc
And if I claim to be a wise man, well It surely means that I don't know