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

Trust is like a mirror. Trust is like a piece if 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.

One star-crossed lover entered such shaky ground recently when, rather than just go through her boyfriend's phone like regular person, she hired porn star Valerie White to essentially honey-trap him.

As you've probably guessed, it did not end well.

The entire debacle was caught on To Catch a Cheater and documented how it unravelled, rather spectacularly.

Initially, the boyfriend had no interest in Valerie's charms, and did not respond to her flirtations. However, he did eventually politely offer to help her, as she seemed "lost".

Tenacious Valerie kept gunning for his phone number, and asked him if he had a girlfriend. The poor man admitted that he was seeing someone, and innocently suggested they could all get together and hang out.

(Image: Youtube/To catch a cheater)

Flustered by Valerie clearly insinuating she'd be up for a cheeky ménage à trois, the man left the scene after asking her why she was interested in him.

As for the girlfriend?

She admitted to "feeling crazy" and "mixed feelings" about her boyfriend giving the porn star his number and added how she hated her for pursuing her boyfriend.

She finally relents: ""Okay, okay. 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."

(Image: Youtube/To catch a cheater)

But.... as soon as she told him about the set-up, it didn't end well. AT ALL.

Moments later, she's all smiles as she gives her man a call - but she hadn't counted on how he'd react.

Yep, he dumped her immediately for doubting him and questioning their trust so publicly.

He tells her he's done, hangs up on her, as she's left saying: "Are you f***ing kidding me? That's how he breaks up with me after a f***ing year?"