• Charles and Camilla's relationship started as a scandal
  • They later made it official after Princess Diana died
  • William and Harry had THIS condition for their father

In its day, it was one of the biggest royal scandals: Charles had an affair with Camilla during his marriage to Princess Diana.

Some time after Diana's death, Charles made the relationship with his also divorced partner official.

As Prince Harry now writes in his biography Spare, his father received formal approval from his children for the relationship.

When Charles introduced William and Harry to Camilla

William and Harry were introduced to Camilla, and Charles then asked them both what they thought of her as his girlfriend.

"When the question came," Harry writes, "Willy and I promised our father that we would welcome Camilla to the family."

Also interesting:

However, there was one condition that the boys told their father: "The only thing we asked for in return was that he didn't marry her. 'You don't need to get married again,' we asked him."

William and Harry's concern was that if they married, Camilla would be compared to Diana.

This is how they are said to have asked their father: "'We support you,' we said. 'We endorse Camilla,' we said. 'Just please don't marry her, just be together, Pa.'"

This condition, as we now know, was not met...

See more in the video above!