Complex sentence: Marge decides that she has had enough of Homer's surly attitude and confronts him, by telling Homer that she defended him when people, including her sisters Patty and Selma, called him an incompetent father.
Split into simpler sentences: Marge decides that she has had enough of Homer's surly attitude and confronts him. She tells Homer that she defended him when people, including her sisters Patty and Selma, called him an incompetent father.