I tried letting my T keep the time but i cant do it. I have my purse sitting next to me open with my cell phone ringer off on top of purse and I check time. My T says that my insurance pays for 60 minutes so I have been ending right at 50 minutes so that she has time to write her notes etc after I leave.

She always wants to talk about rule following and why I am so concerned about it...

If I were in your situation I would just set my own timing to a few minutes before hers so that Im done before her alarm goes off.