La Perversion d'une jeune Mariee (1977)

Marie-Christine is about to be married. Her friend, also a lover of the groom, goes through a photo-album of previous lovers of Marie-Christine with him as they wait downstairs for the bride to appear with her maid (Jenny Feeling) - cue flashbacks including one fo a lesbians lover (Mandarine). The ceremony is actually an orgy-cum-gangbang involving the bride and groom, all the previous lovers, the friend and the maid.