The stepmother has long been attracted to her son-in-law. One day, learning that her daughter is away from home, she seizes the opportunity and invites him over under a false pretext. Feeling she must not let this chance slip away, she begins aggressively seducing him. The son-in-law, who has recently been suffering from a sexless marriage, finds his emotions stirred by her advances, unable to suppress his rising desire. Though their relationship appears ambiguous on the surface, a definite emotional current flows between them. While whispering "no, we shouldn't," again and again, they ultimately come together and fully share in the pleasure. It is the warmth and sincerity between them that truly enhances the allure of their forbidden bond.