Princess Diana made no secret of how isolated she felt after marrying into Britain's royal family. But she still tried to forge connections with her in-laws and sought out the late Queen Elizabeth II in her darkest moments, a new book claims. According to a new royal biography, the late Princess of Wales would make unannounced visits to see her mother-in-law as the cracks in her marriage to King Charles III - then Prince Charles - deepened. And those emotional meetings were often filled with Diana's tears.