I Transmigrated into an Ongoing Novel and Caught the Sickly Second Male Lead's Eye

Marriage first, love later + redemption + a truly yandere male lead! Both leads are faithful in body and heart + happy ending + lots of twists! Xie Ning transmigrates into a wish-fulfillment novel aimed at male readers. The good news: she's the heroine. The bad news: she's about to die. The moment Xie Ning opens her eyes after transmigrating into the book, she sees her husband, the second male lead, beaten within an inch of his life by the original owner. The original owner, Xie Changning, was a frail beauty who helped the man she loved ascend the throne. But as soon as he became emperor, he kicked her to the curb. He not only broke up with her unilaterally, but also married her off to an ugly hostage prince. That ugly hostage prince is the original story's second male lead. After turning dark, he's a deeply twisted man hiding in plain sight, and he'll cruelly kill her. Xie Ning knows from the plot that she has no happy days ahead. If all she had to worry about was being killed, she could save herself. But she can't stand the original owner's chronic headaches. So she consoles herself: “There, there. Let's just stop living.” If the King of Hell says she'll die at the third watch, she'll slit her throat and report for duty right away. Hey, rebellion is the whole point. But while drawing her knife, she accidentally brushes against the second male lead. Huh? Her head doesn't hurt anymore. Xie Ning immediately decides she can live another five hundred years. Since a little cuddling can keep her alive, she decides to give the second male lead a chance. She stops hitting him, brings him food and drink, and even reaches for his hand and wraps her arms around his waist. She thinks that's enough. But she doesn't expect the second male lead to look at her more and more strangely. His gaze always seems like a snake's to her, damp and clinging. P.S. The male lead isn't actually ugly.