I have this unnerving feeling that the psycho girlfriend in question probably looks more like Sandra Fluke than Kimberly Guilfoyle.
I’ve got no proof of that, but these sorts of crazies are almost never really hot.
“Stable” women tend to be closer to average in appearance. Attractive but not so much that it draws every man's attention for miles.
You'll commonly see girls in NYC that mess with traffic and will turn the heads of entire blocks of men. Men just walk up to them and offer things non-stop. Nice at first but it eventually drives them crazy.