The Queen "disapproved" Kate Middleton's "frivolous displays of wealth" before marrying Prince William, a royal biographer claims.
Author Katie Nicholls says the queen found Kate's generous lifestyle "inedible."
The actual author wrote in his biography of 2010 William and Harry: "What if [Kate] was not with William in Balmoral, so the couple were skiing or vacationing in Mustique.
"Kate was there so often that the press dubbed her the" Queen of Mustique, "a title that once belonged to Princess Margaret."
According to The Sun, a source told the royal expert that: "Moving from a five-star vacation resort to another is not the prerequisite for a young woman possibly destined to be a queen."
The Queen was uneasy with Kate's exotic holidays, but also her prominence on the London club scene, when Britain went into recession in 2008.
The author wrote: "Britain was now in a recession, and these frivolous displays of wealth were unpalatable to the Queen."
It is reported that Kate Middleton was "stung by the queen's criticism," and although she was advised by Clarence House not to publicly comment, the now-Duchess claimed to be working for her parents' company as a photographer.
A black and white photo of Kate appeared on the site, but was taken shortly after.
Nicholls said: "It was considered a step too far and in a few weeks it was removed."
Coming in with some advice, it is alleged that Queen has directed Kate to more appropriate roles.
The biography says, "The Queen discreetly suggested that Kate joins a charity and in September she was involved with Starlight, which works with children seriously and terminally ill."
Prince William and Kate Middleton met in 2001 in St Andrews, and are believed to have started dating in 2003.
After separating briefly in 2007 while skiing at the Swiss resort of Zermatt, the couple became engaged in 2010, marrying the following year.
The couple are now the father of Prince George, five, Princess Charlotte, three, and Princes Louis, 10 months of age.
This story was originally published in The Sun and is reprinted with permission.