Transmigrating into the Male Protagonist’s Stepsister

Yu Qian transmigrated into a novel written by her best friend. However, she wasn’t the female protagonist, but the burden brought along when her mother married into the male protagonist’s family. But Yu Qian didn’t care about any of that! What truly mattered was that, in the novel, her mother was still alive. She finally had a mother again! In this life, all she wanted was to be a well-behaved mama’s girl and occasionally watch the male and female protagonists fall in love from the sidelines. What a perfect life! But— Wait, you! Aren’t you the male protagonist’s best friend? Why are you clinging to me? What? You like me? What? You want to marry me? Holy crap! You stole my household r...