Guess what, there is a T I know of who is like yours (except I think she does keep boundaries somewhat better) and she has a WHOLE GROUP of women who ALL had "narcissistic mothers" which she even advertises. Do you think it's a coincidence that she just HAPPENS to run group therapy for women with the same exact kind of mother and that it's an ongoing group? No, she managed to find out exactly what kind of person would swallow every word she said and meet her need to be worshipped.
In a sense she IS right that things are about your mom...but only in the sense that your history with your mom makes you tolerate your T's behavior. Someone with a different kind of mom would have left a long time ago.