The next day, Joanna stabs both her captors brutally to death. It’s apparent that she’s been thinking about and planning this for a while. The contrast between Joanna’s carefully written ransom note and the grisly deaths of the two men is the climactic demonstration of the contrast between outward appearances and inner reality in Joanna’s life. The contrast is heightened still more when she sings a soothing song to the baby, apparently not hesitating at all as she switches gears between brutality and maternal softness. Joanna has abided by the “rules of the game” by doing what she believed she had to do to save the baby’s life.