Macbeth answers, "We will speak further" (1.5.71), but if he intends to appear noncommittal, he hasn't fooled his wife. She tells him that all he has to do is put on a pleasant face, and "Leave all the rest to me" (1.5.73). With that, the partners in crime hurry out to welcome the King they are going to kill.
While King Duncan is having supper in Macbeth's castle, Macbeth steps out to think about the plan to kill the King. When Lady Macbeth finds Macbeth, she exclaims, "He has almost supp'd: why have you left the chamber?" (1.7.29). Then, in order to keep Macbeth committed to the murder plan, she verbally assaults his courage and manhood. She accuses him of being the kind of person who can dream of wearing kingly robes only when he's drunk. She asks sarcastically, "Was the hope drunk / Wherein you dress'd yourself? Hath it slept since?"
Macbeth tries to defend himself by saying, "I dare do all that may become a man; / Who dares do more is none" (1.7.46-47), but Lady Macbeth declares that she's more man than he is:I have given suck, and know. (1.7.54-59)
After this, it's really all over. Lady Macbeth wins. Macbeth asks what happens if they fail, and his wife disapprove the very idea. She will get King Duncan's two attendants drunk, so they won't be able to protect him, and then they'll take the blame for the King's death. Macbeth replies