A wife suspected that her husband was having an affair with the maid. She thought of a plan to take him by surprise. One Friday she told the maid to take the day off and that night she went into the maid's room. She switched off all the lights and, in pitch darkness, slipped into the bed. Sure enough at midnight there were footsteps. She saw a figure open the door and slipped into the maid's bed beside her. After a few passionate kisses, the wife suddenly switched on the lights and asked, "Surprised?" "Of course I am, ma'am!" stammered the chauffeur.