The alleged incident happened when Meghan was unable to make it to Buckingham Palace to try on a tiara before the couple’s wedding, according to the newspaper.
One book claims the aide alerted the Queen to her bad language when she learned of the incident and Her Majesty called her grandson to a private meeting.
“He has been firmly put in his place,” a royal source said.
A new biography of the Duke and Duchess of Sussex, Finding Freedom, indicates that the exchange took place just before the couple’s wedding in May 2018.
Royal insiders, however, have disputed the account of events.
“The book’s version of what happened would not be remembered by everyone of the events and certainly not by those close to it,” a royal source told the Mail on Sunday.
Finding Freedom, written by royal journalists Carolyn Durand and Omid Scobie, contains allegations that a rift was growing between Harry, Meghan and Buckingham Palace on the eve of the couple’s decision to leave public life.
The book claims the Queen was “devastated” by the couple’s decision.