I think the unbalance of one of us being on the floor and the other not would throw me for a loop. Of course, anything pretty much does throw me for a loop in there, so.
The important thing is us finding what works for us. I moved my spot that I sat in after about 6 mos of therapy, finally moving from the chair by the door (which I later found out was Ts chair. oops) to the couch across the room. I don't think I really started therapy until I made that move, all the way in.