Despite sharing some of her husband’s reservations, Catherine reportedly made efforts to support Meghan as she adjusted to royal life.

“She (Catherine) adored Harry and had urged William to maintain his relationship with his brother despite their growing differences,” Myers wrote.

He also claimed that Catherine and Sophie — then the Countess of Wessex and now the Duchess of Edinburgh — had “attempted to assist Meghan as she assimilated into royal life,” though their “repeated attempts” were said to have gone unanswered.

Relations deteriorated further as Meghan became a frequent target on social media “owing to her biracial heritage.” According to Myers, Harry subsequently “demanded” that steps be taken to secure taxpayer-funded security for her.

When he was informed that such protection would only be granted upon marriage, Harry was reportedly incensed and sought support from both William and Charles.

Myers writes that Harry believed the situation to be unfair, pointing out that Catherine had “not only received unofficial guidance from the palace when she was his brother’s girlfriend, but that she had also qualified for round-the-clock protection” once she became engaged to William.