The Ninth Book by Han Ye Zhang Deng Ren

Five months pregnant, Lin Qingwan (formerly Lin Youning) suffers the devastating loss of both parents. She thinks her childhood sweetheart and husband, Li Mubai (formerly Li Yanshu), who took over the family company, is all she has left to rely on. But after using work as an excuse on their wedding night, he turns around and kisses Tian Tian (formerly Tian Yimeng), a poor student raised with the company's support, in a rundown residential complex!

Not suffering from pregnancy brain, Lin Qingwan neither cries nor makes a scene, nor does she let herself stew in misery. She bears her morning sickness and secretly gathers irrefutable proof of his affair, vowing to take back her parents' company and leave the cheating pair with nothing.

While picking up her best friend's child from kindergarten, she unexpectedly rescues Jiang Xiaoyu (formerly Jiang Zhixi), a troublemaking little firecracker known as the “Little Tyrant.” But the little tyrant not only latches onto her, she also brings her formidable father into the picture: Jiang Tingchuan (formerly Jiang Jingming), a cold and ruthless billionaire tycoon from Beijing's elite circles!

Watching Lin Qingwan face her scumbag husband alone, Jiang Tingchuan slaps an agreement gifting her assets worth hundreds of billions in Li Mubai's face. “You picked on the woman who saved my daughter? From today on, the baby she's carrying takes my surname. As for you, better get ready to beg for your meals.”