Topic: Act II, Scene 2
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In this scene, Lady Macbeth and Macbeth discuss disposing of the blooded daggers. We also see an inner picture of Lady Macbeth, and how evil she could possibly be.
Around 1:00 of the video, we see Lady Macbeth speak of smearing the guards with the blood of the king and giving them the daggers to make them seem guilty. How quickly she says it shows that she has planned it ahead of time, ready to make Macbeth king at any cost.
At 1:29, a little water clears them of the murderous deed. Although in the animation, Lady Macbeth never shows any shame over the murder. Possibly to give her a more evil appearance or give any children watching a relief against the murder. There is no worry for the murder at the time.