Who is Margaret Kelly from Welcome to the Monkey House and what is their importance?

Margaret, throughout the story, is at the mercy of her husband's ability and handling of the situation. She holds her sons and does what Kelly says, always with a blanched fear about her. Kelly does not interact much with his wife, knowing that he must win the game and won't be able to if he is trying to comfort her. Margaret breaks down when Kelly sacrifices Jerry, though she does not at first realize what has happened. She must hear the words from Pi Ying to grasp the moment. She then turns on Kelly, beating him and hysterically yelling. By the time Pi Ying is killed and the group is waiting for Barzov's return, Margaret is exhausted and sleeps with her sons on her lap.