Meanwhile, Oronte discovers that Morgana has fallen in love with 'Ricciardo,' and challenges 'him' to a duel. Morgana stops the fight, but Oronte is in a foul mood and takes it out on Ruggiero. He tells the young man exactly how Alcina treats her former lovers and adds that, as far as he can tell, Alcina has fallen in love with the newcomer, Ricciardo ("Semplicetto! A donna credi?" Nr. 12). Ruggiero is horrified and overwhelms Alcina with his jealous fury. Things get even worse when 'Ricciardo' enters and pretends to admire Alcina. Alcina calms Ruggiero ("Sì, son quella" Nr. 13), but Bradamante is so upset at seeing her fiancé wooed before her very eyes that she reveals her true identity to Ruggiero ("La bocca vaga, quell'occhio nero" Nr. 14). Melisso hastily contradicts her and Ruggiero becomes very confused.