Phantom- Infidelity

 “It was like this, sir. That night, M. Maniera and his lady, the jewelers in the Rue Mogador, were sitting in the front of the box, with their great friend, M. Isidore Saack, sitting behind Mme. Maniera. Mephistopheles was singing”—Mme. Giry here burst into song herself—“‘Catarina, while you play at sleeping,’ and then M. Maniera heard a voice in his right ear (his wife was on his left) saying, ‘Ha, ha! Julie’s not playing at sleeping!’ His wife happened to be called Julie. So. M. Maniera turns to the right to see who was talking to him like that. Nobody there! He rubs his ear and asks himself, if he’s dreaming. Then Mephistopheles went on with his serenade
...
  “You are too good, gentlemen,” with a smirk. “Well, then, Mephistopheles went on with his serenade”—Mme. Giry, burst into song again—“‘Saint, unclose thy portals holy and accord the bliss, to a mortal bending lowly, of a pardon-kiss.’ And then M. Maniera again hears the voice in his right ear, saying, this time, ‘Ha, ha! Julie wouldn’t mind according a kiss to Isidore!’ Then he turns round again, but, this time, to the left; and what do you think he sees? Isidore, who had taken his lady’s hand and was covering it with kisses through the little round place in the glove—like this, gentlemen”—rapturously kissing the bit of palm left bare in the middle of her thread gloves.

-Chapter IV