Lovestruck: Changing Bedmates (1993)

Anne, a girl from Nice, arrives in Paris after a broken relationship. She finds work as a translator with the architect Vincent, a macho that overflows with charm and complacency. His wife Lou is a creature of the most perverse, whose beauty will fascinate Anna and she receives Anne in a rather bizarre way. Anne soon finds out that the couple have a rather perverse idea. Although she remains fascinated by the handsome appearance of Vincent, she falls for the advances of Sam.