Sodium pentobarbital is a type of sedative, and the stockpile hints that Kate’s mental health struggles are more severe than anyone has suspected—or than anyone has been willing to admit. Aunt Emily seems unable to believe that Kate’s case is that urgent, or that it can’t be solved simply by keeping Kate occupied with laughter and parades. Aunt Emily’s attitude suggests a blind spot in the family’s ability to acknowledge suffering, as they place such value on achievement, devotion to duty, and fulfilling one’s role.