I've been thinking about this some more and remembered that during my dream I was complaining about current T to ex-T and now this all makes sense:

So I start this new job on the 15th and T's husband is my new boss. She obviously knows I'll work for him, he knows I see his wife for some issues. But I have no idea what he exactly knows about me. But I wonder whether he knows about my BPD (my educated guess is he at least suspects it), my CSA (I don't think T would give any details), my family issues...and so on...
It's just weird knowing my boss lives with the person who knows me best in this world, or at least knows the most intimate details of my life.

I've also been wondering about potential situations like: what if I am depressed again and need some time off, but her husband his slammed with work and really needs me. Would she give me the sick leave or not?
Or if he needs to change my work hours and they conflict with therapy. Should I tell him I'm supposed to see his wife at that time? What is more important work or therapy? Could I ask him to bring me a refill prescription if I need to cancel a session due to his work?

I realize I'm probably worrying way too much, both he and his wife are experienced Pdocs and I suspect they have talked about this among themselves to some degree. I guess all this is more an maternal transference issue where I wonder whether I'm as important as her husband, whose side she would choose and so on.

At the end of the day all I can do is take a big leap of faith, truly believe that she has my best interests at heart and that her husband is a nice guy who cares about his staff.