The Queen "rejected" by Kate Middleton's "frivolous displays of wealth" before marrying Prince William, a royal biographer claims.
Author Katie Nicholls says The Queen found Kate's lavish London lifestyle "uncomfortable".
The royal author wrote in his 2010 biography William and Harry: "If [Kate] was not with William in Balmoral, when the couple were skiing or on holiday at Mustique.
"Kate was so often called the press by Queen of Mustique, a title that had previously belonged to Princess Margaret."
According to The Sun, a source told the royal expert that "swinging from one five star resort to another is not the prerequisite for a young woman who is possibly destined to be queen."
The Queen was disturbed by Kate's exotic holidays, but also her appearance on the London club scene, when Britain took a recession in 2008.
The author wrote: "Britain was now in recession, and such monstrous beauties of wealth were unpleasant for The Queen."
It is reported that Kate Middleton was "stunned by the queen's criticism," and despite being advised by Clarence House for not commenting publicly, the Duchess claimed to work for her parent's company as a photographer.
A black-and-white image of Kate appeared on the website, but was taken down shortly afterwards.
Nicholls said, "It was considered a step too far and in weeks it had been removed."
In need of some advice, the queen is asserted Kate in more appropriate roles.
The biography says: "The Queen had quietly suggested that Kate be affiliated with a charity, and in September she was involved in Starlight, working with seriously and terminally ill children."
Prince William and Kate Middleton met in 2001 at St. Andrews, and one thought to have started dating in 2003.
After a brief split in 2007, while skiing in the Swiss resort Zermatt, the couple were engaged in 2010 and married the following year.
The couple are now parents of Prince George, five, Princess Charlotte, three and Princess Louis, 10 months old.
This story was originally published in The Sun and reprinted with permission.