My Deep Hunger (1973)

She has what they all want...

Jane's husband is passionately in love...with Jane's best friend! Before the innocent young Jane catches on, the 2 illicit lovers imprison her in a sadistic mental hospital...where the bedside manner is positively shocking! But with the help of a diligent and amorous detective, the jilted wife gets her revenge as all discover the sultry secret of Mysterious Jane