To Survive, I Became the Villain's Little Wife

Liu Wangshu transmigrates into a novel—right at the ending where the villain is defeated and peace reigns. After coasting for sixteen years, she learns the supposedly-dead villain will resurrect and slaughter everyone. Her survival plan? Raise him from childhood into a righteous hero. There's just one problem: this angelic-looking disciple is a wolf in sheep's clothing, plotting to overthrow her while playing the perfect student. Can she reform a black-hearted schemer before he destroys them all?