Prince Charles was quite close to his daughter-in-law Meghan Markle up until things went sour.
Robert Lacey, acclaimed historian and royal consultant to The Crown, claims that the Duchess of Sussex was angered by the multiple changes that her father-in-law has planned for when he takes over the throne after Queen Elizabeth.
Lacey's book Battle of Brothers reveals: “In pursuing his own cause of the slimmed-down monarchy, Prince Charles had been making noises about limiting the number of HRHs created by George V’s 1917 convention still further, thus cutting out Archie from his future prince-ship — and Meghan took that personally.”
"No wonder Meghan cried foul. The media explanation of why Charles had stopped taking Harry’s calls was all about money — the long-suffering father was apparently tired of being 'treated like a cash dispenser,' as one royal source put it, but there were more profound issues at stake,” Lacey added, referencing Harry’s claims during the Oprah interview about Charles freezing him out.