My3sns, this sounds like a really difficult situation and I can understand why you'd feel weird about going back next time. I also think that her end of the session timing and responses were a little bit of a misstep on her part for such a big topic.

Since you've asked, I will give you my full opinion though. I'd just try to put myself in the T's position. I'm sure there are rules and procedures that govern her office, and they probably include talking with supervisors about any safety issues, threats, etc. I can also see how a rule that T's shouldn't be alone after hours with clients (any client, not just you) makes sense and is probably a good office practice. Frankly, if I had been in her situation and if someone said that to me, it would probably make me want to be a little extra cautious too, whatever your actual intent. You said in the past you've been considerate of her feelings about other things, maybe you could try to see this one from her point of view too?

If you've worked together well for the last four years, and if you think working with her is helping you, maybe you could at least try to fully talk this out with her before you make up your mind? Maybe you could do a phone session next time so the safety issue wouldn't even be on the table?

Good luck.