Macbeth and Lady Macbeth's initial decision to murder Duncan brings them close together as partners in crime, but the consequences of this act ultimately drive them apart. Macbeth is initially unsure about murdering the king, while Lady Macbeth confidently and eagerly urges her husband to accomplish the deed. After the murder, however, Lady Macbeth's guilt drives her insanity, while Macbeth becomes increasingly willing to kill any who oppose him.
