Editing Così fan tutte (section)

===Act 2===
====Scene 1: The sisters' bedroom====

{{Listen|type=music|image=none|help=no|filename=Wolfgang Amadeus Mozart - cosi fan tutte act ii - no. 19 aria - una donna a quindici anni.ogg|title="Una donna a quindici anni"|description=From [[Musopen]]}}

Despina urges them to succumb to the "Albanians{{'"}} overtures (aria: "Una donna a quindici anni"—"A fifteen year old woman"). After she leaves, Dorabella confesses to Fiordiligi that she is tempted, and the two agree that a mere flirtation will do no harm and will help them pass the time while they wait for their lovers to return (duet: "Prenderò quel brunettino"—"I will take the dark haired one").

====Scene 2: The garden====

Dorabella and the disguised Guglielmo pair off, as do Ferrando and Fiordiligi. The conversation is halting and uncomfortable, and Ferrando departs with Fiordiligi. Now alone with Dorabella, Guglielmo attempts to woo her. She puts up a token resistance, and soon she has given him a medallion (with Ferrando's portrait inside) in exchange for a heart-shaped [[locket]] (duet: "Il core vi dono"—"I give you my heart"). Ferrando is less successful with Fiordiligi (Ferrando's aria: "Ah, lo veggio"—"Ah, I see it" and Fiordiligi's aria: "Per pietà, ben mio, perdona"—"Please, my beloved, forgive"), so he is enraged when he later finds out from Guglielmo that the medallion with his portrait has been so quickly given away to a new lover. Guglielmo at first sympathises with Ferrando (aria: "Donne mie, la fate a tanti"—"My ladies, you do it to so many"), but then gloats, because his betrothed is faithful.

====Scene 3: The sisters' room====

Dorabella admits her indiscretion to Fiordiligi ("È amore un ladroncello"—"Love is a little thief"). Fiordiligi, upset by this development, decides to go to the army and find her betrothed. Before she can leave, though, Ferrando arrives and continues his attempted seduction. Fiordiligi finally succumbs and falls into his arms (duet: "Fra gli amplessi"—"In the embraces"). Guglielmo is distraught while Ferrando turns Guglielmo's earlier gloating back on him. Alfonso, winner of the wager, tells the men to forgive their fiancées. After all: "Così fan tutte"—"All women are like that".

====Scene 4====

The scene begins as a double wedding for the sisters and their "Albanian" grooms. Despina, in disguise as a [[Notary public|notary]], presents the marriage contract, which only the ladies sign. (The men, of course, realise that this wedding is a sham, and are only playing along with it in order to teach their unfaithful lovers a lesson.) Directly thereafter, military music is heard in the distance, indicating the return of the officers. Alfonso confirms the sisters' fears: Ferrando and Guglielmo are on their way to the house. The "Albanians" hurry off to hide (actually, to change out of their disguises). They return as the officers, professing their love. Alfonso drops the marriage contract in front of the officers, and, when they read it, they become enraged. They then depart and return moments later, half in Albanian disguise, half as officers. Despina has been revealed to be the notary, and the sisters realize they have been duped. All is ultimately forgiven, as the entire group praises the ability to accept life's unavoidable good times and bad times.