Final answer:
Mary Maloney initially thinks, speaks, and acts in an emotional and informal manner, but her behavior changes as the story unfolds.
Step-by-step explanation:
Mary Maloney, the protagonist of the story 'Lamb to the Slaughter,' initially thinks, speaks, and acts in an emotional and informal manner.
Her words and tone are filled with warmth and affection towards her husband, as she refers to him using endearing terms and expresses concern for his well-being. However, as the story progresses and an unexpected event occurs, Mary's behavior becomes more calculated and deceptive, revealing a hidden side of her personality.