But the googling of her husband isn't the boundary here. The boundary was in session sharing of her therapist's personal life, not Rainbow's googling. I am only guessing this is for therapeutic reasons not fears of having her space invaded.

I give up

Rainbow introduced this as a boundary issue, and people went along with it. People may want to slap me for this, but I think it's related to the intellectualizing OC thing I have written about before. We are helping to keep Rainbow in this pattern by responding as if it is a boundary issue, when that is not the case.