New Delhi, July 16 -- Prince Harry's long-awaited reunion with King Charles at Highgrove House on July 10 included another key member of the royal family - Queen Camilla.

The private family gathering, attended by Harry, Meghan Markle and their children, Prince Archie and Princess Lilibet, marked the first time in four years that King Charles had met his California-based grandchildren. Buckingham Palace also confirmed that Queen Camilla was present during the reunion.

According to royal author Catherine Mayer, Camilla's attendance reflected her central role in the King's life.

"She is a non-negotiable part of Charles' life," Ms Mayer told People magazine in its latest cover story. "There is no reconciliation with him without her."

Buck...