My advice is for the therapist to not even HAVE you both there.. some therapists like to do a double for the first session to study the dynamic of you both together..
Others will keep you two separate for three or four sessions until they can see you both clearly and THEN they do the double
My vote is for the second one..
It really is a choice for YOU and your therapist
If you are NOT comfortable in the dobule, then you TELL your therapist you want separate sessions... they SHOULD respect that
and since you are NOT contacting him right now, it SHOULD be separate sessions right?