Describe the ways that Patrick's demeanor and comments change Mary. Why does Mary undergoes these changes? Use textual evidence to prove the effect Patrick's comments have on Mary's actions.

Patrick treats her very brusquely telling her to sit down. After he has a second drink and refuses dinner for a second time, he tells her to "sit down ... just for a minute, sit down." This is the first direct order he has given her, a break from the placid personality she has come to expect. He then tells matter-of-factly that he is leaving her. Her actions show her changing from adoring to horrified to robotic.