August 08, 2018 02:00 PM

Prince Charles may be heir to the throne, but it was his wife, Princess Diana, who people wanted to see.

Following their July 1981 wedding, Charles realized that the shy 20-year-old woman he had married was quickly adapting to her role in the spotlight — and growing in popularity with the public.

Diana became one of the most photographed (and talked-about) people in the world, and Charles felt overshadowed.

Lady Elizabeth Anson, party planner and a cousin to the Queen, tells PEOPLE, “[Diana] sort of metamorphosed into a very, very elegant blonde beauty. They did a visit to Wales which was the beginning of, for Prince Charles, realizing, ‘They’ve come out to see my wife, they haven’t come out to see me.'”

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Prince Charles and Princess Diana
Terry Fincher/Princess Diana Archive/Getty
Princess Diana and Prince Charles
Anwar Hussein/WireImage

Charles’ jealousy didn’t end with Diana’s fame — it continued with his eldest son’s marriage.

In his unauthorized biography of the Prince of Wales, Rebel Prince: The Power, Passion and Defiance of Prince Charles, author Tom Bower claims that Charles felt “usurped” by the Middletons and “isolated” from grandchildren Prince George and Princess Charlotte, when Prince William and wife Kate Middleton chose to spend Christmas with her parents rather than with the other royals and setting up their home base miles away from Highgrove (Charles’ residence) to Norfolk “where they could preserve their privacy.”

“Charles saw Kate and William as the new stars and feared he’d be in trouble,” Robert Higdon, the chief executive of Charles’ charity foundation in America, told Bower.

RELATED VIDEO: Prince Charles Was the ‘Architect of the Disaster’ of His Marriage to Diana

This week’s issue of PEOPLE celebrates how the women in the Windsor family, from Queen Elizabeth to Princess Diana and Kate Middleton to Meghan Markle, have each helped usher new ways forward.

Anson is one of many sources who speak in depth about the Queen, her family, the past and future of the royal family in The Story of The Royals, a two-night television event presented by PEOPLE, airs August 22 and August 23 (9:00-11:00 p.m. EDT) on ABC. 

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