[TeaVicar?]

it's a shame that we all feel so much shame about simply wanting to be loved and cared for. From an outsiders perspective, your fantasy seems really normal and it sounds as though you have a good relationship with your therapist to be able to fantasise about her in such a positive way. I also think it's really good that you're going to bring it up with her, as her positive reaction will hopefully dispel some of the shame.

Maybe think about how you feel when you have these fantasies, rather than try to interpret or decode them