can't you hear me knocking?

I made the mistake of hooking up with my upstairs neighbor Celia on-and-off for a few years. Long story short, at one point she started stalking me and it became a big mess. (She also managed to kill my attraction to Alicia Witt, who resembles a younger version of Celia.) I recently found out from my building's superintendent that she'd moved out. That she left without attempting to say goodbye, was a big relief.

Imagine my surprise when 2 weeks later Celia calls me from California wanting to have phone sex. WTF??!!