Reborn, You Broke Off Our Engagement? I’m About to Receive a Noble Title, So Why Are You Crying?

[Both leads reborn + marriage swap + face-slapping and punishing scum + clearheaded heroine + regret arc + both leads untouched] In her previous life, Qin Ruyan and her legitimate elder sister both married into marquis households. She poured her heart and soul into helping her husband, a son born of a concubine, rise to become a powerful minister, only for him to run her through with a sword. As it turned out, while she was working tirelessly for her scumbag husband, he was carrying on with her elder sister, and they even had a child together. When Qin Ruyan learned the child wasn't her husband's and tried to stop them, her sister left a suicide note falsely accusing her of murder. When she opened her eyes again, she was back on her wedding night. Her scumbag husband was kneeling and begging to swap brides, his voice hoarse from shouting: “If I can't be with the one I love, my whole life will be filled with pain and regret!” Qin Ruyan sneered. He had been reborn too. Good. She'd kill them both. Her scumbag husband wanted to take a shortcut to power and success? She'd shatter his beautiful dream and leave him in a bloody heap. Her elder sister wanted to avoid the disabled, short-lived heir and marry into a powerful family? Then Qin Ruyan would marry the heir herself, make sure he stayed safe and sound, and ruin her sister's reputation in the process. Later, her scumbag husband knelt before her, wailing and calling her his ancestor. Later still, the aloof heir became the one clinging to her: “My lady, would you be so kind as to dote on me a little more?”