The Duke and Duchess of Sussex reportedly spent 15 minutes meeting with Prince Charles this week. The couple – who now reside in California after quitting as senior members of the Royal Family – met with Prince Harry’s father at Windsor Castle before seeing his grandmother Queen Elizabeth in her private apartments. Charles’ wife Duchess Camilla also joined them for the visit. Harry’s relationship with his family family has been strained since he and Duchess Meghan took part in a bombshell interview with Oprah a year ago, where they claimed that a member of the royal family shared their “concer…