Mary Robertson, an American businesswoman who lived in London in 1980, hired a young woman to be her nanny. She had no clue that her nanny would later be known as Princess Diana. Back in 2017, Inside Edition interviewed Mary Robertson about Lady Diana Spencer's time working for her and what she labeled as the late Princess' "happiest year of her life." At that point, the People's Princess made only $5 an hour taking care of Mary's toddler son, Patrick, and handling several other activities, including doing their laundry, picking up a bunch of toys and washing the dishes. One...