Lady Macbeth's endearment to her "father as he slept" suggests some compassion and loving attributes, portraying her as somewhat weakened by her femininity which is uncommon at these early stages of the play as she is mostly characterized as ruthless, powerful and manipulative, possibly implying that she is not as lacking of guilt and mercy as she often seems, foreshadowing her mental breakdown due to intense guilt later in the play (act 5, scene 1).