Usually, when she's analysing relationships on Married At First Sight, expert Mel Schilling is cool, calm, and collected.
But things didn't go her way on Monday (1 May) when she joined Dermot O'Leary and Alison Hammond in the This Morning studio, only to accidentally offend one of the hosts.
Mel, 51, had joined the ITV presenters for a phone-in agony aunt session, where she helped viewers with all their dating dilemmas.
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Things quickly went south when one caller told the relationship expert and psychologist that she needed advice on getting the attention of her crush.
She didn't say too much about her anonymous love interest - just that he worked in the media or entertainment industry.
Spotting an opening for a joke, Mel quipped: "Good luck finding a straight man in entertainment."
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It took Mel a second to realise that she had accidentally roped Dermot in on her joke.
Her eyes darted across the table to see Alison Hammond trying her best to hold in her laughter and Dermot looking hurt.
He mockingly held his heart as though he was really offended by Mel's comment.
After the awkward blunder, shook fans took to Twitter to discuss the hysterical moment.
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"Mel from MAFS has just realised what she's said and Alison isn't helping," noted one viewer.
"OMG how awkward from the MAFS woman. To say something like that on live TV," tweeted a second.
And a third added: "Uh-Ohhhh that hurt Dermot hahah. Pretty brave thing to say."
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Elsewhere in her This Morning appearance, Mel commented on her lashing out at MAFS star Harrison Boon last week - a moment that fans had been waiting for.
Those tuned in to this latest season will know that Harrison hasn't been looking the best in his relationship with his new wife Bronte Schofield - but Mel has been quick to put him in his place.
When Harrison was confronted about calling his wife 'fake', and acted as though he had no recollection of ever saying it, Mel refused to let him get away with it.
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"It's been incredible. Because this is what our audience want us to do," Mel told Alison.
"You know, they are so invested in these relationships and when they see bad behaviour, they want us to call it out."
Meanwhile, Mel confirmed that there's a new season of MAFS UK being filmed as we speak and, though she can't reveal much, she did hint that it's on 'a different level.'
Topics: Celebrity, Married At First Sight, Married At First Sight Australia, This Morning, Mel Schilling