I know there is a book called Princess Little Sister, which was written by Su Su, not the one made into a TV series, but the one with the same name, which is a travel note. It's about a woman crossing into a very fat figure, and all the handsome guys around her hate her. The family is very rich, only her mother, who is super good and beautiful. Later, the woman was heartbroken and decided to lose weight, only to find that her mother gave her fattening soup every day, as if there was some conspiracy.