I posted my first response before I saw the thing about the tires-slashing note.

She shouldn't have been making that joke in the first place. Completely inappropriate and unprofessional. Making you feel like her "stalker client?" Not cool.

That being said, you probably shouldn't have put that note on her car, even though you were clearly joking. Whatever-we're all human, we all make mistakes. After she cleared it up with you, I still don't think that banning you from session was the right move. Do you think that she really, truly felt unsafe? Or was she trying to make a point?

Ugh. This whole thing sounds like a mess.

I would be at my wit's end if I were you.