La Parisienne

The daughter of the Premier of France, La Bardot is married to Henri Vidal, the premier's chief aide. When Vidal shows signs of straying from his marital vows, Bardot decides to fight fire with fire. She enchants visiting nobleman Charles Boyer, who invites her to a romantic rendezvous on the Riviera. The outraged Vidal tracks down the would-be lovers, only to discover that nothing has happened-both Bardot and Boyer fell victim to head colds, and spent the weekend sneezing rather than smooching. (allmovie.com)