Sometimes sessions go over. I don't think that is particularly unusual. It happens. That is one reason I was never really bothered if my sessions started a few minutes late. On occasion my own sessions ran over so it seems perfectly normal that might happen for other clients also. (I'm pretty laid back about session start times within about 15 minutes give or take.) Sounds like she handles it well actually. She knows it is her responsibility, not yours. That 16 minute thing seems normal to me, particularly if she was looking at an analog clock. I'm a teacher and think in terms of precise minutes when I glance at the analog clock on my wall.