Les petites filles sodomisées (1985)

Alban hallucinates that his secretary is having sex with her clients in adjoining offices. At home, the maid is spying on Alban's wife having sex with her mistress. The maid is so excited that she calls the gardener into the kitchen to attend to her needs. They are then discovered by Alban and soon everyone is having sex with everyone else, including a masked orgy.