My H knows her name, but I'm not sure he knows how to reach my T or how to find out how to reach her. I don't think he even remembers her last name.
I started seeing a T because my boss (one of the owners of the company I work for) told me years ago that I needed to "change my attitude" or risk being fired. He knows, and his partner, the other owner, he also knows. They don't know her name. No one in my family knows. I prefer it that way.