I need to see a picture of her to judge if this is plausible or not.
Stalking and harassment or other criminal obsessive behavior often don’t have anything to do with the looks of the victim. She (or he) doesn’t have to be gorgeous, sexy, or even young. There’s a lot of anger and a desire to control—control not just the victim but the legal system. The more you try to ignore them or have them stopped legally or threaten them the worse it gets. Some stalkers continue e-stalking from prison after conviction. They won’t give it up for decades. Sometimes the only remedy is chambered in .45.