In Act I, two characters 
In Act I, two characters sing "Ah, guarda, sorella," and compare their lockets, and one characters compares herself to a rock. At the end of Act I, two allegedly revived characters demand a kiss. A servant disguises herself as a notary for a scene featuring a dual (*) marriage involving characters disguised as Albanians, and the opera ends with "Fortunato l'uom che prende" after those disguises are removed. The plot begins when Guglielmo and Ferrando pretend to be deployed for military duty, leaving Fiordiligi and Dorabella behind to sing "Soave sia il vento" with an old cynic. For 10 points, identify this Mozart opera, in which Don Alfonso attempts to prove that women will not be faithful.
In Act I, two characters sing "Ah, guarda, sorella," and compare their lockets, and one characters compares herself to a rock.
{Così fan tutte} ossia La scuola degli amanti [or {They're All Like That}, or The {School for Lovers}]