I don't understand what you mean "it's time for him to come" to a session with you. Do you have a lot of issues concerning him? You said he's great.

My H came to a couple of sessions with my former T and I felt cheated of my time. It was usually productive, though. Once I talked to her first, and then he came for half the session. Maybe you could do that? Tell her your fears about him being there first.

I don't think it's going to mess anything up, though. Your T is still your T and that's not going to change. Good luck!!