Princess Diana was aware that her two sons, Prince William and Prince Harry, were treated differently by the royal family and those working in the firm. At one point, the Princess of Wales even confronted the Queen Mother about it.

Growing up, the Duke of Sussex has always felt that everyone around him favored Prince William. Prince Harry thought that this was unfair, but he couldn’t really do anything about it. Prince William would one day become king, and he was just considered as the spare.

One of Princess Diana’s friends revealed that the late royal told her that she and Prince Charles have been showering Prince Harry with so much love and affection so that he won’t feel overshadowed by his older brother.

“I have to,” Princess Diana said. “Charles and I worked so hard to ensure that both boys receive equal amounts of our time and love; others in the family seem to concentrate on William,” she added.

Princess Diana’s friend told The Telegraph that Prince Harry loved it most when he and his mom were the only two people at Kensington Palace. During one instance, Prince Harry went home early from boarding school because he was sick. When he got inside, he told the palace staff how happy he was to not have to share his mom with Prince William.

A source close to Prince William and Prince Harry backed up the claims and said that the royal siblings’ decision to go their separate ways also has to do with Prince Harry’s desire to forge his own path. Now that he is married to Meghan Markle, Prince Harry feels that he can accomplish more things.

“Harry has always complained about being sidelined by William,” the source said. “But I think they see this split as an opportunity to really spread their wings.”

However, even though Prince Harry will never become heir to the throne, he also has some advantages as the spare. During one of his arguments with Prince William, Prince Harry told his brother that he could do anything that he wants because he won’t be king.

Princess Diana, Prince Harry, Prince William and Prince Charles Prince Harry, Prince William and Prince Charles at a parade in the Mall, London, during V.J. Day commemorations, August 1994. Terry Fincher/Getty Images