what happens when angelo and the merchant confront S.Ant?

The merchant had just spoken to Antipholus of Ephesus who claimed he never got the necklace (because he didn't; Antipholus os Syracuse has the necklace). He sees Antipholus of Syarcuse (wearing the necklace) and accuses him of lying to him about not receiving the necklace. Antipholus, of course, denies this, and gets upset that the merchant is questioning his honor. Both men draw swords and prepare to fight, but Adriana comes in just in time to stop them. She keeps the merchant from harassing him more, stating that he is crazy.