Princess Diana had been talking openly about her failed to Prince Charles during her interviews. She first exposed details about their union and her husband’s affair in Andrew Morton’s book in 1992.

Years later, the Princess of Wales continued to talk about the heir to the throne during her other interviews. In 1995, she told Martin Bashir for Panorama that there were three of them in her marriage. The statement was a reference to Prince Charles and Camilla Parker Bowles’ affair.

And by the looks of it, Princess Diana would continue to present Prince Charles in a negative light if one person didn’t intervene and urged her to stop. On the “Royals” podcast, royal commentator Angela Mollard said that Queen Elizabeth II forced the Prince and Princess of Wales to sign a confidentiality agreement that states that they could no longer discuss their marriage and divorce.

Mollard also said that Prince Charles and Princess Diana’s divorce wouldn’t have happened if not for Her Majesty. The monarch wrote a letter to the late royal urging her to divorce the future King after she heard what she told Bashir. Her Majesty wasn’t also pleased with how Princess Diana admitted to having an affair with James Hewitt.

And to make things worse, Princess Diana was still legally married to Prince Charles when she said all of those things. This encouraged the Queen to just put an end to their relationship.

“So, after Diana spoke on Panorama about her closeness to people like James Hewitt and she spoke about the ‘three of us in this marriage’, the Queen actually intervened. So that was in 1995, where she talked openly about her marital difficulties. And the Queen quickly sent a letter to Diana and said ‘you need to divorce’ and that was finalized in 1996,” Mollard said.

After the royal couple’s divorce was finalized, Prince Charles and Princess Diana went on with their lives separately. And less than a year later, Princess Diana passed away.

Prince Philip, Queen Mother, Princess Diana, Queen Elizabeth, Prince Charles, Prince William
Pictured: Prince Philip, Prince Charles, Queen Mother, Princess Diana with Prince William and Queen Elizabeth II at Buckingham Palace. Getty Images/PA