My T takes responsibility.. when I was triggered this one session and left her office a total mess and ended up needing an emergency session, she started our emergency session with, "First, I want to apologize. I should have told you to stay so I could see you after my next client, when you were feeling so distressed." She owned it.

We haven't had too many occasions for that, though. She's been great and there haven't been reasons for her to apologize.