Lady Macbeth's reaction is characterized by a combination of greed, ambition, and a willingness to do whatever it takes to achieve her goals. She is so consumed by these desires that she is willing to push aside any moral considerations and become complicit in murder and deception.
She famously utters the words, "Glamis thou art, and Cawdor, and shalt be / What thou art promised," emphasizing her belief in the witches' prophecies and her determination to ensure their fulfillment. Her ambitious nature drives her to go to extreme lengths to manipulate and control Macbeth, ultimately leading to their downfall.