Macbeth wrote a letter to his Lady to inform her about the meeting he had
during the day. He wanted her at his side because he thought that she
could help him! She had a strange personality, so she decided for
Macbeth. Indeed he didn't want to kill the king of Scotland, even if
he wanted to be the king of Scotland like the three witches told him!
He didn't know what to do, but the Lady had clear ideas: she wanted
to became a queen, so she immediately thought about the king's death.
Macbeth was worried for the meeting with the witches, but his lady
was not afraid of this! She wanted her husband at home because she had

a plan which couldn't fail. she knew that Macbeth was worried but he had 

to think that his ambition was to be a king! They were both ambitious, so 

they decided to kill the king to take the throne.