It seems like someone isn't happy that her freaky stalker husband can't get over me.
Completely understandable, but cut the guy some slack. I am a man magnet after all.
The other woman - Apparently there are a lot of them out there!
The woman standing in the way between you and the guy you love (i.e. his girlfriend) or, the woman who's moving in on your man (i.e. skank).
Articles on being the other woman:
1. Inside the Guilty Mind - article about several versions of the other woman
3. Reflections of a serial non-monogamist - interesting blog of "the other woman" who is very happy.