After duncan’s murder, lady macbeth knows that she and her husband must appear to be entirely ignorant of the king’s death before his body is discovered or people may suspect their involvement. which lines from the play support that fact? lady macbeth: "get on your nightgown, lest occasion call us, / and show us to be watchers." macbeth: "wake duncan with thy knocking. i would thou couldst." macbeth: "whence is that knocking? / how is’t with me when every noise appals me? " lady macbeth: "my hands are of your color, but i shame / to wear a heart so white."