Hiring a porn star to test whether your man would cheat is never a good idea – as one woman found to her cost.

The suspicious girlfriend sent stunning Valerie White to chat up her boyfriend of a year, and the honey-trap backfired in the worst way.

The story unfolded on YouTube channel To Catch a Cheater, and the unidentified man was filmed as he was approached by the blonde actress.

He initially ignores her, walking into a book store after dismissing her questions.

When he comes out again, Valerie says she is “lost” and asks for his number, but he replies: “What do you want my number for?”

He does give her his number but admits he has a girlfriend and suggests: “We could hang out … the three of us or four of us.”

When she hints at a threesome, he tries to walk away, but she asks him to drive her home before telling him she has nowhere to stay.

She asks: “Is it cool if I stay with you? Just for the night?”

The man then gets suspicious and asks what she’s doing there and says: “Why are you interested in me?”

She answers: “I’m a porn star and I have this new season coming up and I need to practice. I don’t care that you have a girlfriend.”

She adds: “It looks big through your pants. Can I touch it?”

Hilariously, the flustered guy seems more worried that he’s at a bookshop than anything else.

He replies: “In front of Barnes and Noble? Naw.”

The poor man eventually escaped and his girlfriend, watching the exchange, admitted  to "feeling crazy" and having "mixed feelings" about her boyfriend giving the porn star his number.

She finally decided: "OK, OK. I'm not going to break up with him but I don't like that he got her number and said he would hang out."

But the video shows her confessing her trap to her man – and that’s when it all goes horribly wrong.

Furious at her for testing him publicly, he dumped her immediately, telling her: “I'm done.”

As she begs him to be understanding, and tells him “I did this for us”, he hangs up.

The girlfriend is left open-mouthed and gasping: "Are you f***ing kidding me? That's how he breaks up with me after a f***ing year?"

Is she really surprised?

To Catch A Cheater has a history of framing love rats in honey-traps with one recent sting tempting a guy into cheating with a big-bottomed twerking champ.

Relationship

Relationship wisdom and several pop songs frequently say trust is a key ingredient.

Trust is like a mirror. Trust is like a piece of paper. Trust is like a rubber. You get the picture - once broken, crumpled or worn down, it's probably not coming back.

Equally, misplaced suspicion isn't ideal. So, if you decide to test someone, then - your own neuroses aside - you're probably on shaky ground.