He has received the letter and wants to discuss it with his wife.
Next, Cherubino enters the scene with a commission letter Almaviva had forgotten to seal. However, he is amazed when the women ask him to undress. Susanna performs the aria “Come, kneel down before me,” or “Venite, inginocchiatevi” as she teaches the page to walk and behave like a woman. The Countess quickly hides Susanna and Cherubino as the Count himself arrives unexpectedly. He has received the letter and wants to discuss it with his wife. However, he becomes suspicious after noticing her restlessness. He demands to enter the locked inner chamber where Cherubino was hiding. However, the Countess thwarts him, claiming Sussana is trying her wedding dress inside, as the trio “Susanna, come out” plays in the background. Almaviva, still not convinced, forces Rosina to accompany her as he searches for a crowbar. As they leave, Susanna locks herself in the inner chamber as Cherubino escapes through the window, while performing the duet “Open the door, quickly!” However, Rosina, unaware of these events, confesses everything to the Count. She is subsequently shocked as Susanna is found inside the chamber, as the finale “Come out of there, you ill-born boy!” is performed. Almaviva, ashamed, begs for her forgiveness.