Perversity

A Strange Woman — A Stranger Love

From the back:

Perversity is the story of the compelling passion that overwhelmed two men and a woman in the rain-swept backstreets of Paris.

Irma, the young and wanton prostitute, lived with her “man” Bébart. Then her brother’s strangely perverse passion sudenly dragged all three of them down into a nightmare of agony and torture…

via