Ashe would have stared at Larxene open-mouthedly is if were not for the fact that opening your mouth like it would be unseemly for a princess. But she has just said that the three of them are going to stay in one room. Ashe will be sleeping in one room with a man who is not her husband. That is utterly unacceptable.

She does not have the money to get another room, however, nor does she have the courage to actually annoy Larxene, so as long as she would have her own bed to sleep in, it would be fine. "We won't have to share beds, do we?"