Molly is Jaggers’ maid who we later discover is also Estella’s mother. Jaggers defended Molly years before when she had been accused of murdering a woman in a barn out of jealousy. Molly was cured of a wild temper after her trial (the fear of being executed shook her) and agreed to work for Jaggers immediately. In her early life, she married Magwitch by jumping over a log, and later, to make him jealous, told him that she had killed their daughter (who we later find out is Estella). Molly is small, but she has incredibly strong wrists. The backs of her hands are mangled from the fight she had with the woman in the barn.