I am not completely sure, but this is how I would order these events: Viola enters Orsino's court dressed as a male. Olivia asks Cesario about his parentage. Feste returns the ring to Cesario that Orsino had given to Olivia. Sebastian reveals to Antonio that he has a twin sister. Malvolio makes a fool of himself in front of Olivia. Antonio offers to take Cesario's place in the duel.