Lady Booby is everything that Joseph and Fanny are not; attached to town life, blind to her own motives and consequently to those of others, shallow in her feelings and thus scornful of those who do feel deeply, her dangerous legal maneuvers in Book IV have extremely unpleasant implications.
Throughout the novel, Lady Booby's reason and her passion are at odds; she is clearly the agent of confusion in Fielding's comic plan. Her mental muddle works against the resolution toward which he is drawing his characters, her selfishness denies the love on which this resolution is based, and her concern for her reputation exile her from the novel's happy ending. Yet the energy and vividness with which Lady Booby is portrayed in her turmoils prevent us from seeing her as a supreme villainess; she is more than a pawn in Fielding's game. She embodies the struggles which we all have at times: "I despise, I detest my passions. Yet why?"