Mia did go to the bathroom just after entering the room with me, but she only checked the time after returning (and having put the sheets on etc.). I guess she had some bad experiences with time discussions (the Swiss are kind of strict with that) and actually apologized for being so blatant about it. She mentioned the half hour was over just past the 30 min mark and after finishing, she made sure we stayed in the room for the full hour. Like this, I don't really mind clock watchers that much.
