She faints.
Macbeth and lady Macbeth try to avoid suspicion by getting into their pajamas after committing the murder so people will think they were asleep all the time.
Macbeth and Lady Macbeth acted surprised and shocked by the events. Lady Macbeth pretends to faint and Macbeth tries to avoid suspicion by stating the King would have died happily if he had died earlier.
Lady Macbeth's statement "What is done is done" is ironic because she says it to try to reassure herself and her husband after Duncan's murder, when in reality, the consequences of their actions continue to haunt them throughout the play. The statement reflects Lady Macbeth's attempts to suppress her guilt and anxiety by dismissing the gravity of their crimes, which ultimately leads to their downfall.
Lady Macbeth tells Macbeth that if they fail in their plan to murder King Duncan, they will simply try again until they succeed. She reassures him that their ambition and determination will ensure their success.
Lady Macbeth controls her husband's hysteria by questioning his masculinity and manipulating his ambitions. She criticizes his doubts and fears, appealing to his desire for power and success. Through a combination of psychological manipulation and emotional pressure, she drives him to carry out their murderous plans.
by calling him a coward
During Act 3 Scene 4 of MacBeth, MacBeth spots Banquo's ghost in his chair and begins to yell at it. Lady MacBeth reacts by calming everyone at the Banquet. She says "the fit is momentary... feed, and regard him not" so that everyone will just ignore MacBeth while she tries to stop his ranting. She questions MacBeth's manhood as she has done before to try to make him stop. Eventually, MacBeth ruins the party and Lady MacBeth tells everyone to leave.
Lady macbeth wants macbeth to kill king duncan because she wants to be queen. King duncan has a lot of trust with macbeth so no one will suspect it. And she also persuades him by saying he can be king, and have all this power.
Lady Macbeth drugs the guards stationed outside King Duncan's chamber to ensure they are unconscious and unable to interfere with her plan to frame them for Duncan's murder. This allows Macbeth to easily access Duncan's chamber and carry out the assassination.
Macbeth wants to keep his plans for Banquo's murder a secret from Lady Macbeth in order to protect her innocence and shield her from the guilt associated with the crime. He also wants to maintain his power and control over the situation without involving her. Additionally, Macbeth may fear that Lady Macbeth would try to dissuade him from pursuing the murder, as she has shown signs of moral conflict and guilt in the past.
It's because when Duncan said, "The air / nimbly and sweetly recommends itself / Unto our senses", it is dramatic irony because we know that in the scene just before, this is where Macbeth and Lady Macbeth are going to try and kill him.
Macbeth says that he wishes Banquo was present at the dinner, yet Macbeth murdered Banquo. Macbeth proposed a toast to Banquo so that the Lords would not suspect Macbeth of any foul play. However, later on in this scene Macbeth betrayed himself. He thought he could see Banquos ghost, and he was acting strangely. The Lords were very confused and thought he was going mad and Lady Macbeth had to act for Macbeth and try and save their reputation.