“To Catch A Predator” host Chris Hansen was busted cheating on his long-suffering wife again last week, which came as news to his first mistress, who couldn’t believe the married man she was sleeping with would ever betray her that way. Is that irony, or just plain stupidity? Radar Online says:

The 51-year-old married father of two embarked on a steamy six month affair with Kathleen Collins, a stripper that he met in Las Vegas in early 2011.

The petite blonde fell hard for Hansen and was “floored” when she discovered that he had also been carrying on an extramarital fling with another woman, Kristyn Caddell, a 30-year-old TV news reporter for WPTV 5 in West Palm Beach, Fl.

Collins learned of Hansen’s other mistress when she saw photos of the two of them together in the Enquirer, who broke the story – and a close friend claims: “I know this sounds crazy, but Kathleen really thought she was the only one.”

Look, you can’t be “the one” when there’s a wife in the equation. It’s called math. One mistress + one wife = two people. The only way you can be “the one” is after you’ve eliminated the your number two. Ahem. Eliminated your number two. If there’s a lower common denominator out there, I’d like to see it!

She set her MySpace to private, so these are the only pics available of her right now: