Tomaso Cecchi is Alessandra's brother. Alessandra and Tomaso do not get along. Tomaso is threatened by Alessandra's intelligence and her sexuality. Alessandra sees Tomaso as a bully and a womanizer, believing that each night he goes out into the streets he is spending time with prostitutes. It is not until after her marriage that Alessandra learns that Tomaso is Cristoforo's lover. Alessandra finds herself jealous of Tomaso, but she loves him enough that she chooses not to go to the new government about this homosexual affair. As a reward, Tomaso becomes bitter by disease and he turns in Alessandra's true love, the painter, to the government for acts of sodomy. It is because of Tomaso that Alessandra will not see her love for more than ten years and will never have the opportunity to become his wife.