A Royal expert’s upcoming release has detailed the moment the Princess of Wales allegely reached her “limit” with brother-in-law Prince Harry.
In an excerpt from Kate! The Courage, Grace, and Power of the Woman Who Will Be Queen released to US Weekly, author Christopher Andersen claimed that Kate had been “disappointed” by Harry’s bombshell BBC tell-all in 2025.
“The damage was done: seeds of doubt concerning the King’s chances for a full recovery had been sown,” Andersen wrote.
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Princess Catherine reportedly reached her “limit” with brother-in-law Prince Harry. (PA/AAP)
During the interview in question, Prince Harry discussed the ongoing rift within he Royal Family at length, revealing he “didn’t know how much longer [his] father had,” after his 2024 diagnosis with an unspecified form of cancer.
Per the excerpt, these comments made Kate “more disappointed than angry.”
But Prince William, on the other hand, was reportedly “apoplectic” with rage, according to testimony from a royal courtier featured in Andersen’s book.
“But William, who had already slammed the door shut on his brother over what Harry wrote in Spare, was, in the words of a courtier, ‘apoplectic’ with rage,” Andersen writes.
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The Princess had previously encouraged the two warring brothers to reconcile. (Chris Jackson/Pool Photo via AP)
“Now it was time to nail the door shut once and for all, and for the first time Kate, who had worked harder than anyone to mend the rift between the brothers, willingly handed her husband a hammer.”
A Sandringham staffer revealed that that while she is “the sweetest, most loving person you could ever know,” even she “has her limits.”
Speaking to US Weekly about the excerpt, Christopher Andersen shared his thoughts on why this may have proved the final straw for Kate.
“I think Kate’s relationship with her father-in-law over their shared cancer battles really has made her much more sensitive to King Charles’s feelings,” he explained.
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“She knows better than anyone that having someone publicly imply you may be at death’s door is horribly demoralising.”
The Princess of Wales announced her own cancer diagnosis in 2024, just one month after King Charles went public with his.
Andersen claims that Harry’s comments from the interview were what “changed things” for Kate, when she’d previously made attempts to bridge the widening gap between the brothers.
“I’m sure Kate must have felt stung by that comment as well, since she is in a situation very similar to the king’s,” Andersen added.”
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