Macbeth ought not to worry unduly. What's done cannot be undone. We are already the King and Queen of Scotland, what is there to worry about? He is just being paranoid.

Something does not seem right between him and Banquo. He is starting to fear Banquo and his son, Fleance, for some strange reason. He confides in me, and seems to be hinting that something terrible is going to happen to both father and son.