Ambiguous Little Sister in Law, also known as 暧昧小姨子, is a captivating web novel in the Chinese language that explores the complex dynamics between family members. Set in a cold hospital room, the story follows the intriguing relationship between an elder brother-in-law and his little sister-in-law, raising questions about love, loyalty, and moral boundaries. With themes of passion and assistance, this novel delves into adult and smut genres, appealing to readers interested in themes of adultery, affairs, and modern-day relationships with a male protagonist.