My ex, who works at ABC News worked on a piece a couple of years ago about a middle-aged woman in West Virginia who impersonated a young blonde on some chat rooms. She started an online relationship with a guy who claimed to be a young marine deployed in the Middle East.
It went on for a year, before the wife of the 50-year-old man pretending to be the young marine found out. They lived in Vermont. The wife proceeded to send the "young blonde" pictures of her husband, saying "this is the guy you've actually been chatting with all this time."
The woman in West Virginia was so enraged that she started flirting online with a real-life coworker of the man she had been chatting with previously. The coworker was a real-life 20-something. The 50-year-old went ballistic and murdered this young man.
When Vermont police found out about the love triangle, they got in touch with authorities in West Virginia, worried that the man (before he was arrested) could be on his way down there to do harm to the "girl." That's what led to the woman's cover being blown. Now, if all of this weren't fucked up enough, it turns out the pictures the woman had been using were of her own teenage daughter!