Answer: Guilt
Explanation:
Lady's Macbeth's sleepwalking indicates that she is tormented by guilt in Macbeth. Earlier in the play, she was complicit in Macbeth's murder of Duncan and usurpation of the throne, which results in her husband's murderous tyranny. Now, during the sleepwalking scene, she is shown to be fixated with the act of washing her hands, perceiving her hands to be bloodstained. This fixation reveals the degree to which these crimes have weighed on her conscience.