Lewd Family: Stepmother's Bedroom (1991)
Original title: いんらん家族 義母の寝室
Lewd Family: Stepmother's Bedroom is a 1991 Japanese-language drama movie directed by Akira Fukamachi, with a running time of 54m. It stars Mayumi Inoue, Hitomi Hayase and Asako Mochizuki.
Wataru, a young, nerdy man who also narrates the film's story, uses some of his time to peep on his parents having sex, as well as on his sister, and is often seen masturbating to a porn magazine.