Queen Elizabeth presided over the British monarchy for 70 years. During that time, the monarch raised a family , become a grandparent , and witnessed her children going through divorces . As a result, the late Queen reportedly became used to royal relatives crying in her presence. According to royal author Ian Lloyd, in his book The Queen: 70 Chapters in the Life of Queen Elizabeth II , the former monarch had some unexpected encounters with the spouse of one of her kids. "By the mid-1980s, Charles had resumed his relationship with Camilla Parker Bowles and Diana had embarked on an affair with former cavalry officer James Hewitt ," per Lloyd. "Although she professed being 'terrified' of her mother-in-law, Diana took to calling on The Queen unannounced to pour out her heart to her." Article continues below Per the biographer, "Sometimes, The Queen's schedule meant the princess had to wait.…