A room in Macbeth’s castle – Lady Macbeth

Lady Macbeth receives a letter from Macbeth about what happened at the heath and what the witches said about him becoming King and becoming the Thane of Cawdor.  She then was planning to kill the king because she thought that Macbeth did not have the guts to kill anyone and that she had the guts.  They then meet and Macbeth tells Lady Macbeth that King Duncan is coming for dinner.