Final answer:
Lady Macbeth initially has doubts but later becomes determined to kill the king. She questions Macbeth's commitment but convinces him to go through with the plan.
Step-by-step explanation:
Lady Macbeth initially has doubts about whether they should kill the king, but later becomes determined to go through with the plan. In Act I, Scene 7, she questions Macbeth's commitment to the plot, expressing concern over his hesitation. However, she convinces him to follow through by questioning his love and courage. In Act II, Lady Macbeth helps Macbeth carry out the murder of King Duncan and becomes consumed by guilt afterwards.