Strict boundaries?
Strict boundaries are: you can't call outside the session, you can't send email, you can't write your thoughts down, session starts and ends at time, client pays every session...., etc.

She is setting boundaries about intruding upon her personal space. That is normal behavior.

And as the T, she has the right to set boundaries that make her feel safe in her practice. She has different boundaries with different clients.
If you don't like it, instead of working through it by talking about it and choosing the behavior that is respectful, look for a therapist that seems to fit your boundaries. Because this is what you are doing, in essence already. Choosing the boundaries you want.