Prince Charles became visibly upset with Queen Elizabeth II after she did something in relation to Camilla Parker Bowles.

In the book “The Duchess: The Untold Story,” author Penny Junor said that Her Majesty dislikes surprises. This is the reason why the Queen’s private secretary did not immediately allow Camilla to go to Prince Charles’ home after Princess Diana’s death.

Sir Robin Janvrin told Junor how he informed the future King that he has to ask for the monarch’s permission first before letting Camilla go to his home for the first time. However, Janvrin’s suggestion did not sit well with Prince Charles.

“The Prince’s language was unrepeatable,” Janvrin said. He also recounted the heir to the throne’s statement as, “In my house… how dare he be so rude in my house?”

“Although he had snubbed the prince over meeting Camilla that day, he did have an amicable meeting with her on another occasion when he had warned the Queen in advance. He hadn’t intended to be rude but he knows what the Queen hated above all things were surprises and that if he agreed to that earlier meeting, the news would have quickly found its way across the park,” Junor wrote.

But Junor stressed the fact that if only Prince Charles informed the Queen beforehand that he wanted Camilla to visit him at the palace then the 93-year-old monarch would have allowed it.

Meanwhile, Prince Charles and the Queen are not necessarily close. After Prince Charles was born, the Queen and Prince Philip embarked on a series of royal engagements and left their eldest son in the care of nannies.

Multiple reports also revealed that the Queen’s favorite child is not Prince Charles but Prince Andrew. One of the reasons had to do with the fact that Prince Andrew was born much later than his two older siblings and the Queen has spent more time with her two younger kids.

Queen Elizabeth II Queen Elizabeth II is seen at the Chichester Theatre while visiting West Sussex on Nov. 30, 2017, in Chichester, United Kingdom. Photo: Getty Images/Stuart C. Wilson