Why Kate Middleton Is Retreating from the Spotlight After Wimbledon: ‘She Will Be Back’ (Exclusive)

“Being with her family and just being herself will give her energy,” a palace insider tells PEOPLE

Catherine Princess of Wales and Princess Charlotte of Wales attend day fourteen of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024 in London, England.

Kate Middleton arrives to attend the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024. PHOTO: KARWAI TANG/WIREIMAGE

Kate Middleton’s appearance at Wimbledon was likely her last public outing before a quiet summer.

The Princess of Wales, 42, stepped out at the tennis tournament with her daughter, Princess Charlotte, and sister, Pippa Middleton, for the men’s singles final in just her second public event of the year amid her cancer treatment.

Robert Jobson, author of the new book Catherine, the Princess of Wales: A Biography of the Future Queen, out Aug. 6, tells PEOPLE exclusively in this week’s issue, “Before, she used to live her life by the calendar, and now she is living her life, and the calendar comes in after.”

“She will be back, but when you have had an experience like this, it changes your perspective and the order of things,” he says.

Princess Kate would usually attend Wimbledon finals with her husband, Prince William, but he took their oldest son, Prince George, to watch England’s soccer team play in the final of the Euros against Spain in Berlin. The family was soon reunited, and they are now looking ahead to a summer of seclusion, privacy and continued healing for her.

Stefan Edberg, Princess Charlotte of Wales, Marjory Gengler, Catherine, Princess of Wales, Stan Smith, Tom Cruise, Bec Hewitt and Debbie Jevans court-side of Centre Court during the men's final on day fourteen of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024 in London, England.

Princess Charlotte and Kate Middleton in the Royal Box during the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024.KARWAI TANG/WIREIMAGE

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They’re likely to spend much of it at their country home of Anmer Hall, close to the beaches of north Norfolk, where the family enjoys outings and boating. A late-summer stay at Balmoral Castle hosted by King Charles, 75, who is facing his own cancer treatment, will be factored in too.

“She won’t have to be on center stage,” a palace insider tells PEOPLE. “Being with her family and just being herself will give her energy. There will be plenty of time to focus on her recovery.”

Despite being front and center in the Royal Box at Wimbledon for about two hours and 40 minutes, Princess Kate appeared to have gained some comfort from the warm welcome and being out and about.

Catherine Princess of Wales laughing court-side of Centre Court during the men's final on day fourteen of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024 in London, England.

Kate Middleton in the Royal Box during the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024.KARWAI TANG/WIREIMAGE

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“This will have given her sustenance. She has gone through something awful and stressful, and it is crucial to have little wins to look forward to or to give you the courage and energy to go forward,” the palace insider says. “And this was it.”

The rare outing didn’t come without much thought, planning and steely preparation from the Princess of Wales, who is the patron of the All England Club.

“It showed a lot of courage and character, as she knew that the world was watching,” says Jobson.

Catherine Princess of Wales presents the winner's trophy to Spain's Carlos Alcaraz after beating Serbia's Novak Djokovic during their men's singles final tennis match on day fourteen of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2024 in London, England.

Kate Middleton presents the winner’s trophy to Carlos Alcaraz after beating Novak Djokovic during the men’s singles final tennis match of the Wimbledon Tennis Championships on July 14, 2024.KARWAI TANG/WIREIMAGE

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Since her last high-profile outing at Trooping the Colour on June 15, Princess Kate has been focused on her recovery and finding joy in her children, Prince George, 10, Princess Charlotte, 9, and Prince Louis, 6, while gradually resuming duties behind the scenes. A palace source confirms that she has been making calls, speaking with staff and keeping up with the latest on her royal causes while doing “a little work from home,” as Kate explained on June 14.

Last month, palace aides emphasized that her appearance at Trooping the Colour did not signal a return to public life.

Before her appearance at Trooping the Colour, Kate expressed hope to “join a few public engagements over the summer,” but tempered this by acknowledging that she’s “not out of the woods yet.” She fulfilled that hope with her appearance at Wimbledon and can now step back from the spotlight again to focus on her recovery in private.

Adds a source close to the royal household: “It’s good not to feel under pressure and just take her time.”