Prince William and Kate Middleton realized they needed to "up their game" after Meghan Markle's first royal engagement, according to "The New Royals" by Katie Nicholl.
Prince Harry and Meghan joined William and Kate on a panel at the first annual Royal Foundation Forum in 2018, months after the Duke and Duchess of Sussex announced their engagement in 2017.
According to Robert Lacey's book "Battle of Brothers: William and Harry — The Inside Story of a Family in Tumult," William worried that Harry was "moving too fast" with Meghan.
In her book, Nicholl also wrote that William and Kate were relieved when Meghan and Harry stepped down from their royal duties
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