Margaret tries to reason with Signor Naccarelli, who saw Clara's childlike handwriting as she completed her marriage form. Seemingly unconcerned with her immaturity or her handwriting, Signor Naccarelli admits that he saw Clara write her age on the forms – 26 – and that this makes her an unsuitable bride for his son who is only 20. Relieved that he has not discovered their secret, Margaret begs him to change his mind, but he will not. She invites him to take a walk with her, and the two wander from one end of Florence to the other as the sun slowly sets and the night comes on ("Let's Walk"). By giving him time to mull things over and by not pressuring him, Margaret succeeds in putting the wedding back on track; Signor Naccarelli says he will meet them at the church the following morning.