AKA La frígida y la viciosa
AKA Desires of a Nymphomaniac

A couple whose marriage is already in trouble find it thrown into
sexual chaos by the introduction of a sexually disturbing woman
(Sara Mora) into their life. Soon she encourages and manipulates
them into a variety of sexual experiments that unleash their
darkest desires and challenge their very concepts of sexuality.

From the director of the Spanish horror films Blue Eyes of the
Broken Doll and Curse of the Devil.