I usually just lurk and wasn't going to respond to this thread, but neat to see someone had the same thought I had.

This doesn't seem like a boundary issue at all; at least not yet. It could really benefit you to work through your feelings on this. Do you think it's wanting to be closer like some have said? It would especially be helpful to work through with her if this is one of your primary issues expressing itself. Perhaps it manifests in other ways too.

Trigger warning:

Having been the victim of sexual assault preceded by stalking, I read up on it to better understand what happened to me. It's been years so someone may want to fact check this, but from what I can remember, the profile of a violent stalker is a person who experienced a love rejection followed by a sort of psychotic transference. the stalker's need is to regain control.

End of trigger

This is definitely something you (a client) should be able to bring to your therapist. It is a risk to tell her for reasons others stated, but I also think that if she has a problem with your driving by her house as you stated, that she might not be the best person to handle the issue/s that expresses itself this way. Someone with issues that manifest by these types of behaviors might need someone who can handle this sort of intensity from a client. Otherwise, her fear could ruin the therapy. But it's her job to keep her issues out of your therapy.