"Marilyn, for her part, focused on what was driving Arthur away. She spoke of the monster inside her. By that she seems to have meant the rage that was in sharp contrast to the shyness and sweetness she tended to project. In the beginning, Marilyn said, Arthur had perceived her as a victim, beautiful and innocent. She tried to be those things for him. When inevitably the monster disclosed itself, Miller was shocked and disappointed. He started to pull back."
— Barbara Leaming (Marilyn Monroe)