These Things We Do (2014)

A psychiatrist who uses his practice to sexually torment his patients, enters into a dark, sexual underworld with his most depraved patient, a seemingly sweet young woman with a taste for control, fear and pain. With her, he will confront the sins and pain of his own past, including the betrayal of his long suffering wife and his involvement in the death of her sister, a patient who he drove mad. And in so doing, he will find that pain is the greatest pleasure there is!