Woman admits to catfishing her best friend’s husband so she can catch him cheating – but is it fair on him?

A woman has admitted she deliberately catfished her best friend's husband in an attempt to catch him cheating.

The unidentified woman made an extra effort to call him after his wife learned he was using a dating app.

After vehemently denying to his partner that he had done anything wrong and insisting that the profile was fake, the friend took the matter into his own hands.

“My best friend of 20 years was recently told that someone had been seeing her husband on a dating app,” she wrote in Mamamia's advice column Don't Freak Out.

“When she confronted him, his response was that his phone had been hacked and it was a fake account. He said he reported it and it was removed.”

A woman has admitted to deliberately catfishing her best friend's husband in an attempt to catch him cheating

She explained that her friend and her husband have been together for a while and even have a child together.

The woman, who wrote in the column under the alias “Concerned Catfish,” said she knew the information her boyfriend had received “was not a fake account” and that he had created it himself.

“He fooled her, she is too naive to question him and just kept believing his story,” she wrote.

She explained that she had created a fake Instagram account and he started liking her stories and 'hanging out with her'.

The woman, who wrote in the advice column under the alias “Concerned Catfish,” said she knew the information her boyfriend had received “wasn't a fake account” and that he had created it himself.

“The interactions seem innocent, but why are you going out of your way to be friends with her when you're married??” the woman asked.

'I feel sick knowing all this and not being able to tell my best friend. I feel like this isn't enough 'concrete' evidence to prove he's guilty of shady dealings, but I feel so sick knowing all this is going on.”

The conflicted woman concluded her entry by asking whether she should tell her best friend, wait for the man to take the next step or just leave it alone.

Columnist Holly Wainwright responded by sympathizing with the writer who appears to be looking out for her friend who is at risk of getting hurt.

But she said the woman's fake account only “made things worse.”

“This is absolutely none of your business and you should delete that account immediately,” she said.

“I understand the motivation for your catfishing. I understand you believe you'll have irrefutable proof of his bungling in your fancy phone in no time.”

Wainwright added that the “Concerned Catfish” situation will most likely end in tears.

“But if he does, will your friend thank you?” she asked.

“If you confront her with the 'evidence' that her husband is saying inappropriate things on the Internet to women he doesn't know, do you also have an expectation of what you want her to do with it?”

Wainwright added that a woman's job is to be a best friend and provide support, not to be a detective.

“If he is who you think he is, something will happen,” she concluded. “And maybe your girlfriend will tell you, and maybe she won't. And maybe she will leave him, and maybe she won't. But your friendship with her should not depend on any of these things.”