She tells him that if she had promised him that she’d dash out the brains of her own child, she would’ve done it, ‘Have plucked my nipple from his boneless gums / And dash 'd the brains out.’ She uses the word dashed to emphasize on how she would destroy and murder her own blood and to prove that she doesn’t have an ounce of dignity within her. She would go through with the murder of her own helpless child, if she had promised what Macbeth had promised her which was to kill Duncan.
In the picture, the blood on her hands can represent the violence she has within her and the type of person she is, which is an evil one at most. The background being black is a representation of darkness. Darkness is commonly associated with immoral conduct. This is prime example of how Lady Macbeth showed cruelness from the beginning of the play.
n the middle of the play, Lady Macbeth showed a more guilty side to her. She had stepped back from her previous actions and felt as if it were time to seize the violence of her and husband. It seemed as if her guilt was causing excruciating agony and she couldn’t handle to pressure of the cruel actions of her and Macbeth’s. She proclaims,
“Nought’s had, all’s spent
Where our desire is got without