Terming this grooming seems to go too far. Tell her you felt uncomfortable and ask her what her purpose was. My T asks me about sex more than I would like but that's because, as your T said, she wants me to feel more comfortable about being a lesbian. She has even expressed pleasure knowing that I enjoyed a night with someone. That was strange to me and I told her her comment weirded me out. She explained why she felt pleasure about my experience and though still odd to me, I got her reasoning. Heck, I wish my T wanted me, but no, she has her treatment approach.