Although many assumed Prince Charles and Princess Diana had a perfect marriage, the public’s perception of the couple changed drastically when news of his affair with Camilla Parker Bowles was revealed.

While Charles romance with Camilla damaged his image, Diana reportedly took things a step further by telling a lie about their engagement.

In the book, “The Firm,” Penny Junor claimed Princess Diana lied to royal biographer, Andrew Morton, about Prince Charles heartless behavior during their engagement. 

“In my view, despite all the books, articles and documentaries, there is still a profound misconception about the whole sorry tale. [Charles’ private secretary] Michael Colborne was one of the first people the prince told his proposal to Diana,” Junor wrote.

“He was the one who organized flowers to greet her on her return from Australia where she had gone while making up her mind about marriage,” she continued.

Prince Charles reportedly wanted to make a grand romantic gesture by sending Diana a large flower arrangement along with a handwritten note to welcome her back home. Charles arranged for the flowers to be delivered by his protection officer, but during a conversation with Morton, Diana told the author a different story.

“I came back from Australia. Someone knocks at the door – someone from his office with a bunch of flowers. I knew they hadn’t come from Charles because there was no note. It was just somebody being very tactful in the office,” the Princess of Wales said to Morton.

However, Junor claims Diana lied about the gesture to make Charles appear cold. “Nothing could have been further from the truth,” the biographer wrote.

Prince Charles and Princess Diana had issues from the beginning of their relationship. Before their wedding, Charles reportedly began to question whether he should go through with the marriage.

In the Channel 5 documentary, “Charles and Di: The Truth Behind Their Wedding,” the narrator claimed that “in the month before the wedding, Charles had confided to one of his friends he did not yet love her. But he was sure he could.”

Despite their luxurious royal wedding in 1981, Prince Charles and Princess Diana divorced in 1996. The following year, the Princess of Wales died in Paris from injuries sustained in a car crash.