I'm so sorry you are going through this
@Muted! What a sticky, fraught, complex, painful situation to be in.
I get that you were totally vulnerable when you went to her and slept with her.
I'm guessing you are wracked with guilt and confusion at how to proceed.
It sounds like she needs to get herself some therapy, and not be being a therapist, at the moment.
I hope you can find someone new to.confide in, to help you see your way through this messy sitch.
Being accountable for your part and recognizing your mistake in all this, and getting good, sound support to work through why and how you made the choices you made, will, surely, go a long way in repairing the damage done, in your own relationship(s) and selfhood.
It may take time, but, with the willingness to face yourself, in all this, I think you will be able to develop the clarity and resilience needed, to put this behind you.
If it was a more childlike part of you that came forward and was submissive, to your T, can you comfort that part? Listen to her? Resolve to create safety for her, from now on?
I get the impression that it was a young and vulnerable state, perhaps, that lead.you to go over there and comply with this situation.
I hope you can reassure and forgive that vulnerability and susceptibility, in yourself. And find the adult part that will choose a responsible and self-caring path, from, now on.