Lady Macbeth is meant to be seen as an evil, cruel monster. However, there were parts in the play where Shakespeare put in some subtle hints that suggest she has a more sensitive side, underneath the harsh, heinous barrier she puts up around herself. Maybe she doesn’t choose to be a sinister creature. Maybe she got warped into it by forces outside of her control.
Lady Macbeth was probably fine with her nearly average life as the wife of the Thane of Glamis. But when her husband mentions that he is now the Thane of Cawdor, it can be assumed that Lady Macbeth’s interest in power is stirred awake. And to put the icing on the cake, he comments in his letter that there is a possibility that he could become king. So this gets Lady Macbeth all riled up. She is ready to be queen, and she is formulating plans in her head before her husband ever gets home. She knows her husband does not have the gall to take Duncan’s life on his own. She says, “Yet I do fear they nature; It is too full o' th' milk of human kindness to catch the nearest way.” In a way, this forces her to compensate for his lack of motivation. As soon as Macbeth backs out of the plans, Lady Macbeth is all over it. She basically tells him that he is not getting out of it.
The first little hint of sensitivity that Shakespeare shows for Lady Macbeth is in Act II, Scene II. Everyone has gone to bed and Lady Macbeth is by herself while her husband is assumed to be killing King Duncan. She says to herself, “Had he not resembled my father as he slept, I had done’t.” It is significant that she says this, but even more so that she says it when no one else is around. She doesn’t want to seem weak.