Queen Elizabeth and Kate Middleton appear to have a good relationship, but the monarch reportedly delayed the Duchess of Sussex’s engagement to Prince William due to her jet-set lifestyle.

Before Kate joined the royal family, she was a socialite who partied and went on luxurious vacations. Due to her expensive lifestyle and lack of career, Queen Elizabeth became concerned about how the public would react if William proposed.

In the book, “William and Harry,” Katie Nicholl claimed the monarch did not think Kate was worthy of joining the royal family. “She is one of the hardest-working royals, despite her age, and that a future member of the family was without a full-time job was unacceptable to her,” the author revealed.

“While the rest of the world speculated that an engagement was on the horizon for William and Kate, the Queen believed an announcement should be postponed until Kate was settled in a career.”

Despite Prince William’s feelings for Kate, Elizabeth couldn’t support the couple’s engagement. “It is Her Majesty’s opinion that if Kate is one day going to be William’s consort, then she needs a proper job,” a source told the royal biographer.

“Swanning from one five-star holiday resort to another is not the prerequisite for a young woman possibly destined to be Queen.”

Nicholl claimed Kate was devastated when she learned about Queen Elizabeth’s opinion. “She was stung by the Queen’s criticism. Although they had met several times at formal occasions, the Queen knew little of the girl who has enchanted her grandson, and [at that time] had never had a one-to-one meeting,” Nicholl wrote.

“Privately, she had grave concerns and believed that Kate needed to have a job and identity in her own right before an engagement was announced.”

Nicholl revealed that Kate earned a flashy reputation in 2008 due to her frequent vacations. “If she was not with William at Balmoral then the couple were skiing or holidaying on Mustique. Kate was there so often the press dubbed her ‘Queen of Mustique,’ a title that had previously belonged to Princess Margaret,” the royal expert revealed.

“Britain was now in a recession an and such frivolous displays of wealth were unpalatable to the Queen.”

Despite her reservations, Prince William got Queen Elizabeth’s approval to propose to Kate in 2010. The couple married in 2011, and are now parents to Prince George, Princess Charlotte and Prince Louis.