Tang Xin and Yun Lei were enemies. If she hadn't had nowhere to hide, she wouldn't have stayed at his house shamelessly. However, how could she impulsively cause a scene in a brothel when he did whatever he did to her?
Yun Lei was reluctant to let Tang Xin stay at his house. He obviously wanted to apologize, but why did he go to her bed? Seeing how painful her poisonous condition was, why did he even want to go back with her?