How does Mary Maloney have APD or BPD?

Mary Maloney, the protagonist in Roald Dahl's short story "Lamb to the Slaughter," exhibits traits that could be interpreted as indicative of Borderline Personality Disorder (BPD). Her intense emotional responses, such as the violent reaction to her husband's announcement of leaving her, demonstrate a fear of abandonment and difficulty regulating emotions. Additionally, her impulsive behavior in committing murder and her subsequent calculated actions to cover it up reflect instability and a lack of self-control. However, diagnosing a fictional character without comprehensive context is speculative and should be approached with caution.