(very hastily) Let’s not take too long with this. The Count wants to get the door open to catch his wife with Cherubino, whom he thinks is having an affair with the Countess. Had he knocked thirty seconds later, the Countess and Cherubino may have already embarked upon an affair, but as of yet, the Countess is completely innocent. The Count threatens to call in his guards to break open the door, but the Countess reminds him that the outcome he supposes would cause a scandal. So the Count goes to his room to get tools to break open the closet himself, but not before insisting that the Countess come with him and lock the door. Aaaaand… Go!