In the web novel 'What Should I Do if I D*d It With My Husband’s Brother?' by an unknown author, the protagonist Du Ruoran navigates the complexities of her marriage to the Duan family while encountering significant challenges from her husband's eldest brother. This tale of love, betrayal, and family dynamics falls under the genres of Josei, Romance, and Smut, with tags such as Beautiful Female Lead and Human-Nonhuman Relationship adding intriguing layers to the narrative.