Nice Sister-In-Law (2015)
Original title: 착한 처제
Nice Sister-In-Law is a 2015 Korean-language romance movie directed by Kang Hoon, with a running time of 1h 37m. It stars Kang Eun-hye, Kang Sung-pil and Lee Seung-chae.
Ha-yeong is a successful psychologist. One day she gets a secretive request from her sister Ha-joo. Apparently Ha-joo's husband Woo-seong is refusing to have sex. Ha-yeong agrees to be their couple therapist but finds out that her brother-in-law actually has sexual desires for her and not her sister...