When Kate Middleton married Prince William, she appeared to have an easy transition into her new role in the royal family. However, an author claims Kate learned heartbreaking lessons throughout her relationship with William.

Although the Duke and Duchess of Sussex have known each other for almost 20 years, during the early days of their romance, they experienced a break up that tested their relationship.

In the book, “Charles: The Heart of a King,” Catherine Mayer claimed Kate showed she was capable of handling life in the royal family, but it wasn’t easy.

“I don’t think there’s anything at this stage that I could teach Kate about being a member of the Royal Family because she clearly took to it very quickly,” the author explained.

“But she also had this very interesting period in her relationship with the Prince where they split up and got back together again. Which was very clearly a testing period, a proving period, something where she had already been through the baptism of fire in terms of what it meant for destroying any chance of a private life she would ever have.”

Despite the drawbacks of living in the royal spotlight, Kate was determined to spend her life with Prince William. Unfortunately, she didn’t learn about one of the most heartbreaking aspects until she married the prince.

“She went into it in that sense with her eyes open. The one thing I suppose she may not have known, and will now know very well, is just how peculiar royal life is,” Mayer revealed.

“It is the strangest place that I have ever spent time in, the palaces, just that sense of never ever being really alone.”

Despite the ups and downs throughout their relationship, Prince William proposed to Kate in 2010, and the couple married the following year. The Duke and Duchess of Cambridge are now parents to Prince George, Princess Charlotte and Prince Louis.

Kate Middleton
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the traditional Easter Sunday church service at St George's Chapel, Windsor Castle on April 21, 2019 in Windsor, England. Getty Images/Max Mumby