I consented for my T not only talk to my psychiatrist but also to my son's therapist, my husband's therapist and both their psychiatrists. I like them working as a team. I recently talked to my T about my son and he asked whether or not he could inform my son's T which I agreed to. I find it very helpful to that they talk. That way they all know what's going on. Maybe not share your file but have verbal communication release like my family has.