OMG, I am shocked by this and would absolutely not pay it. The therapist is in charge of time keeping and as she is the one facilitating the session it is her respsonsbility. I would not use my therapy session to discuss it and would email her and discuss my concerns about it or leave a voice message but either way it would be on her time as it was her mistake. Also I would be weary of seeing her again as I would not trust her to let me know when my time is up and not having the time on display is concealing it- I for one would have trouble trusting this t.