My T never answers his phone. Even when you call the receptionist it goes directly to voicemail and they call you back. I have never even heard a phone ring while I was in the waiting room. I would be very upset if he answered the phone during a session. That is my time. And an hour a week is not much time IMHO. I totally understand why you don't want to say anything, I could never work up the courage to either, but if you don't she may continue to do this and I think it will just lead you to resent her and the relationship won't work. Maybe you could just metion it casually like in a conversation about how phone interuptions drive you crazy. I have done this with my T, and he always is very good about picking up on what I am asking or trying to convey. Hopefully one day I will be able to be a little more direct.