The three witches made a new curse and were visited by Macduff. Macduff met his worst fear and was visited by the three apparitions. They told Macduff what he fears most and told him not to worry.
The three apparitions appeared at Macbeth's request. Each told him something about Macduff. The first one, who appeared as a knight head, told him that he should beware of Macduff. The second one, who appeared as bloody child, told him not to be bold and firm and violent. The third and final one, who appeared as a child wearing a crown and holding a tree, told him to not worry and to be brave because no one would be able to defeat him unless they marched down and faught him
In this act Lady Macduff is talking to her son about his father. They are brutally interrupted by men looking for Macduff and they end up killing the boy and Lady Macduff.
Thy father is no traitor
Traitorous father and thy husband I have. Better off dead