In Act One, the recurrent theme of the game was "Who are you?" Now that question becomes more serious, as Sam, shocked by the appearance of these strangers in his house, repeatedly demands that Elizabeth reveal her identity. She eventually insists that she is Jo's mother, come from Dubuque, Iowa "for her daughter's dying". However, Sam knows Jo's mother as a small, balding woman with pink hair, who lives in New Jersey and is estranged from Jo, and Elizabeth is clearly not she. Unfortunately for Sam, who vigorously protests the veracity of Elizabeth's claims, Jo runs into Elizabeth's arms and never questions her appearance or identity. Whoever she and Oscar may—or may not—be, they clearly represent the coming of Death, something familiar and unknown. At the end of the play, Oscar carries the dying Jo upstairs one last time. As the devastated Sam demands once more to learn Elizabeth's true identity, she ends the play with this line: "Why, I'm the lady from Dubuque. I thought you knew. "the audience" I thought he knew."