This outrageous Spanish thriller was distributed in the US as Death Haunts Mónica--an apt enough title until one realizes how much else is haunting the poor girl. Murder, mayhem, kinky Sapphic encounters, and risqué bathing behavior are just a few of the elements in Ramon Fernandez's off-the-wall Giallo.
It features no fewer than three European beauties: Nadiuska, Bárbara Rey, and Karin Schubert. All three are on full display for a significant part of the film. They are accompanied by several others who present brief glimpses.
The principal male, Monica's (Nadiuska) husband, is French actor Jean Sorel. I remember him in front of a firing squad in the original Day of the Jackal. Of course, Monica may be putting him in front of a firing squad if he doesn't leave his mistress (Bárbara Rey).
Elena (Karin Schubert) is plotting to steal the company, and stirring things up with Monica and her husband. But, things get twisted and you don't know who is fooling whom.