Kate Middleton has played a pivotal role in fostering good relations between her husband, Prince William, and his father, King Charles III, acting as a mediator during times of tension. She has earned the trust and admiration of King Charles, who sees her as the daughter he never had and may soon appoint her to his Privy Council. The late Queen Elizabeth II also valued Kate's composed demeanor and low-key presence, which she believed would help stabilize the monarchy. During the Queen's final months, Kate ensured that Prince William spent as much time as possible with his grandmother, a decision that comforted the Queen. Additionally, Kate's mother, Carole Middleton, provided crucial support during Kate's brief breakup with William in 2007. Kate's contributions have validated the late Queen's decision to welcome her into the Royal Family, highlighting her significant influence and popularity within the monarchy.