Scene 2
Edmund, the bastard son, tricks his father into believing that Edgar is plotting to have him killed, putting him on edge. Then he does the same to Edgar, making him think that their father is trying to hurt him. He puts them against each other to get his way, setting it up.
Scene 3
Goneril is upset with her father and his actions that have come with his old age, she plans to somewhat plot against him with her sister. She even tells her servants not to tend to him and his knights as they usually do.