Princess Kate and Prince William’s “justified fear” of being betrayed again by Prince Harry is the main reason the couple are keeping their distance from the Duke of Sussex, according to a source. The Prince and Princess of Wales are currently not on speaking terms with Prince Harry following the release of his autobiography Spare. Harry’s memoir contained private details regarding several arguments he had with his elder brother as well as multiple digs at Princess Kate. A royal insider told the Mail that Kate and William have ruled out a reunion with the Sussexes until they receive an apology…