Many know of the tense conversations had between Princess Diana and King Charles III but only a few are aware of the ones between the late royal and her husband’s then-mistress Queen Camilla.

In the early 1990s, the love affair between the monarch and his now-wife became public during his marriage to Diana.

Before the revelation caused a high-profile fallout between Charles and Diana, which included an iconic “revenge dress,” the late princess attempted to save her marriage with a confrontation.

One of the first times the British Royal Family got word of the affair was during a birthday party for Lady Annabel Goldsmith in 1989.

In royal author Tom Bower’s book Rebel King: The Making of a Monarch, he recalls a moment at the celebration when Diana unexpectedly ran into Camila while she was still married to her first husband Andrew Parker Bowles.

According to The Telegraph, she stated, “I know what’s going on between you and Charles and I just want you to know that.

“She said to me: ‘You’ve got everything you ever wanted. You’ve got all the men in the world fall in love with you and you’ve got two beautiful children, what more do you want?’ So I said, ‘I want my husband.’ And I said, ‘I’m sorry I’m in the way…and it must be hell for both of you. But I do know what’s going on. Don’t treat me like an idiot.’”

Despite Camilla’s attempt at concealing the tension, the confrontation was already the talk of the room, causing a mix of reactions from other attendees.

“Camilla’s intimates blamed the bruising encounter on Diana for creating ‘such a public scene'” while “others accused Camilla of b—-iness.”

Charles and Diana split three years later and by 1995, they were officially divorced.

Eventually, while Charles and Camilla continued their romance, Diana moved on with other suitors, including Dodi Fayed.

The two met in the summer of 1997 while Diana was vacationing with her sons, Prince Harry and William, in Saint Tropez.

Shortly after they had been intimately photographed, Diana and Dodi were killed in a car crash in Paris.

Eight years after her death, Charles and Camilla married in a civil ceremony in Windsor.