Lusty Widow(1976)

Tamiko is the queen of a photo-taking salon, a widowed 26-year-old with a vibrant body she doesn't know what to do with. Since her husband passed away, she's agonized over the loneliness of sleeping alone every night. Tamiko has to feed her mother-in-law, Suzuyo, who is old but very sexy, and her brother-in-law, Koji, who attends a cram school. One day, a couple comes to her asking if they can take a commemorative photo of them having sex as a "proof of their love." Although she accepts, she becomes aroused when she witnesses their passionate intercourse, and is reminded of her experiences with her late husband, soaking her trousers as she takes the photo. But two men are after Tamiko. One is Yamada, the owner of the cram school, nicknamed "the widow killer." The other is Bunta, the son of a wealthy real estate magnate. The two men approach Tamiko, who exudes a bewitching allure...