Wow this is an unusual situation. You would think your T would have thought to check her schedule and get everyone called whom she was supposed to see. I remember the 3rd time I saw my T and it was during the day instead of late afternoon like usual. It was 20 minutes after our scheduled time before she came to the waiting area with huge apologies for running late. Since then she's been late most every time but not that long. I know I was starting to wonder if she forgot about me or if I had the wrong appointment time on the day she was really late. I think it is pretty normal for T's to run 5-10 minutes behind, kind of like doctor offices. They may have sessions that go over, phone calls that take longer than expected, and then need to review their notes before the client comes in.