Her words and actions suggest that she wants Macbeth to immediately become king, which encourages Macbeth to quickly follow through on the idea of killing Duncan. Her words and actions suggest that she wants Macbeth to immediately become king, which encourages Macbeth to quickly follow through on the idea of killing Duncan. , She wants to be the one who kills Duncan, which becomes a source of conflict between her and Macbeth. She wants to be the one who kills Duncan, which becomes a source of conflict between her and Macbeth., Her words and actions suggest that she has some misgivings about the witches’ predictions, which is why she has little involvement in the planning of Duncan’s murder. Her words and actions suggest that she has some misgivings about the witches’ predictions, which is why she has little involvement in the planning of Duncan’s murder., She suspects that Banquo may try to seize the throne before Macbeth, which is why she insists that they kill Duncan while the king is in their castle.