Ignoring Lucrezia's advice, Gennaro attends a party at the palace, swearing never to be parted from his friend Orsini. Orsini leads the party in a brindisi or drinking song ("Il segreto per esser felici") and they drink. Lucrezia enters and announces that in revenge for their insults in Venice she has poisoned their wine and arranged five coffins for their bodies. She has hitherto believed that Gennaro fled Ferrara on her advice, and is thus dismayed when he steps forward and announces that she has poisoned a sixth. Orsini, Liverotto, Vitellozzo, Petrucci and Gazella fall dead. Gennaro seizes a dagger and attempts to kill Lucrezia, but she stops him by revealing that he is in fact her son. Once again she asks him to drink the antidote, but this time he refuses, choosing to die with his friends. In a final cabaletta ("Era desso il figlio mio"), Lucrezia mourns her son and expires. (Wikipedia)