Princess Anne’s daughter, Zara Tindall, had been concerned about her mother’s demanding schedule even before the royal was sidelined by a recent horse-related injury.

On June 24, the palace announced that 73-year-old Princess Anne had sustained minor injuries and a concussion following an incident at the Gatcombe Park estate in southwest England.

Her medical team indicated that her head injuries were consistent with an impact from a horse’s head or legs. This incident led to temporary memory loss for Anne.

“For the last several years, Zara Tindall has been worried that the palace has been relying too heavily on her septuagenarian mother,” Christopher Andersen, author of “The King,” told Fox News.

“She has a point,” Andersen added. “Princess Anne is routinely described as the hardest-working royal, racking up 457 engagements last year alone. She has always been fondly thought of as inexhaustible — even invincible. When Zara saw her mother lying in a hospital bed suffering from a severe concussion and memory loss, she was understandably shaken.”

Andersen highlighted the current challenges faced by the royal family, noting: “With both King Charles and Princess Kate battling cancer at the same time, it’s hard to escape the feeling that the royal family is falling apart physically. Princess Anne’s injury only underscores that perception.”

“This means that more and more responsibility will fall on Prince William’s shoulders and Queen Camilla’s. Keep in mind that the queen turns 77 next week, and King Charles is justifiably concerned about the toll all this stress is taking on her health as well,” he added.

“Only so many shoes can drop before the institution of the monarchy itself begins to look awfully shaky,” Andersen continued.

Shortly after Anne’s injury, updates were made to The Royal Diary section of the royal family’s website, which tracks official engagements. “The diary on @RoyalFamily website has been updated to remove Princess Anne’s engagement next week, as she is still recovering from her accident last month,” reported Gert’s Royals.