As Macbeth leaves the hall to kill Duncan, Lady Macbeth enters, remarking on her boldness.
"That which has made them drunk had made me bold,
What hath quench'd them hath given me fire."(II.ii 1-2)
She asserts that she would have killed the king herself then and there,
"Had he not resembled my father as he slept, I had done't." (II.ii.13-14).
Although Lady Macbeth appears brave and strong we can still find moments of her being tense and nervous just as her husband is throughout the murder. Prior to the murder Lady Macbeth takes a drink of wine. She does so in order to calm her nerves confirming that she is indeed very tense about the forthcoming murder. In addition, while Macbeth is doing the deed, Lady Macbeth begins to worry that the guards will awake and although this does not actually happen she is so tense her mind cannot help but obsess over the smallest of noises. Her anxiety is also apparent through her constant use of the word 'hark' as she almost jumps with every sound.
Throughout the murder Macbeth seems to be extremely tense as well, as he calls out "Who's there? What, ho!" and then asks Lady Macbeth "Didst thou not hear a noise?" It is apparent as well that he begins to hear things but no one is there. It is his nerves that compel him to imagine these nonexistent noises.
Another obvious reaction to the murder