I don't think Ts are necessarily reliable judges of the effectiveness of therapy. They are too invested in believing that it helps. I also think that an unstated maxim of therapy is that the T's assessment trumps the client's, and if the client says it's not helping, the T might have to step in and "correct" this perception. I understand what you mean about not wanting to hurt her, and this is a tough spot, because giving honest feedback might do just that.