duncan
The contents of Macbeth's letter to Lady Macbeth was about Macbeth's prediction from the 3 witches he met in the beginning - about him being the Thane of Cawdor (thane means prince/king) and then the King of Scotland. Lady Macbeth becomes hyped, because she was waiting for the chance to have all the power to be a queen.
Macbeth does the things he does(like kill Duncan) because Macbeth is manipulated and coaxed by Lady Macbeth to do them. On his own, he would not have done so even though he was ambitious. Lady Macbeth, does the manipulating and all the cruel lines that she says are of her own accord. Nobody forces her, she choses to become evil while Macbeth is forced to become evil.
Lady Macbeth is the more forceful, probably because she is less foresighted. Macbeth knows the likely consequences of his acts, but she does not. She cannot imagine the downside to the murder; all she sees is herself as the chatelaine, hosting dinner parties. This lack of foresight gives her the strength to use everything she's got to persuade Macbeth to the murder.
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.
He didn't want to tell her of the horrible murder because she was a woman but ironically the killing was all her idea.
Macbeth is charged to not fail the feast by Lady Macbeth. This is ironic because, despite her admonition, Macbeth does indeed fail to keep the feast when he sees the ghost of Banquo, revealing his guilt and inward turmoil to all the guests. This contrasts with Lady Macbeth's efforts to maintain an appearance of normalcy and control.
Lady Macbeth echoes the words of the witches when she says "All hail, Macbeth, that shalt be king hereafter!". This echoes the witches' prophecy that Macbeth will become king.
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.
First they drink toasts to them, then frighten them, then push them unceremoniously out of the door.
The witches' prophecies all come true. Indeed Macbeth should beware Macduff because Macduff is the one who kills him, the one who is not of woman born. The forest of Birnam Wood (or part of it anyway) does travel to Dunsinane before the final battle.
Shakespheare shows the relationship of Macbeth lady Macbeth shakespeare shows they are very close and trust worthy at the start when they have just come from battle. because Macbeth writes a letter to lady Macbeth just when he has come from the battle and they didnt no each other that well but then in mthe letter at the end it says to my dear one but later in the play there relationship ain't all that because are arguing and angry because they are discussing about kilkling the kingn lady Macbeth wants Macbeth to do but Macbeth dosent want to
She plays the role of planning it, and making sure all runs smoothly.