The next morning, Qin Zhizhi woke up completely unaware that his affair with Liu Yiyi had been discovered. But even if it were discovered, he wasn't afraid that Cai Yiren would make a fuss. After all, Liu Yiyi was initially a pawn placed by Qin Weijia beside Qin Zhiyou, but after being found out and turned by Qin Zhiyou, she lost her value and was ruthlessly abandoned. Unable to contact Qin Zhiyou afterward, she most likely realized that she was discarded. At this point, Qin Zhizhi was the only decent man at hand, so naturally, he became her target. Once she managed to hook up with Qin Zhizhi and solve her survival problem, she naturally wanted more.
Although Qin Zhizhi prefers gentle people, he sometimes likes to change things up, that's why Liu Yiyi's bit of arrogance happened to catch his fancy. Or perhaps it was the status of being Qin Zhiyou's ex-girlfriend that gave him a different sense of conquest, which is why he messed around with her.