I was kinda the same way, except it was a paternal transference. It was very odd - the way I felt and it left me feeling rather creepy.

My therapist helped me to understand that, as adults, a lot of things get conflated with sexual thoughts. It's just the way humans are wired. All kinds of thoughts and emotions fly around in therapy. There is nothing to feel sick or unusual or upset about. It's all part of the process.

I know that is very easy for me to say now, having come out the other side of it. Again, I do understand the feeling. I also know that it happens and you can work through it.

All bets really are off in therapy. If you let it be that way, I think it makes for good therapy.