With watery eyes, King Charles faced Prince William and Prince Harry across the stone aisle of St. George's Chapel on Sept. 19. The father and sons watched in somber silence as the coffin of their beloved mother and "Grannie" was lowered into the Royal Vault, beneath the chapel nave. Together, but also apart. "When families have a falling-out, you long for them to hug one another," royal biographer Penny Junor tells PEOPLE in this week's cover story. "It broke my heart." For all the fairy-tale trappings of the global farewell to Queen Elizabeth, the interment of Britain's beloved monarch was, at heart, a painful family funeral. Pick up the issue on newsstands Friday, and tap the bio link for the story.