I Transmigrated into a Book, So Why Would I Settle for Being the Secondary Wife?

Transmigrate into a book + cannon fodder + adored by the whole family + feel-good story + strong female lead Song Ruozhen transmigrates into a book, becoming the male lead's wife who dies young. Her immense family fortune lets the male and female leads live in luxury for the rest of their lives, while her entire family becomes their foil and meets a tragic end. She arrives on the day of her wedding, only to find two bridal sedan chairs entering the gates at once. Not only is she, the legitimate wife of a distinguished family with a marriage contract in hand, demoted to secondary wife, but they even act as if they're doing her a favor? Song Ruozhen: “What a load of nonsense! Who wants to be a secondary wife?” What couldn't she do with a fortune like that? Why should she hand it over to the male and female leads? Let whoever wants to be a complete sucker do it! Her father has gone missing? As the dignified head of a mystical sect, she can divine the future, read fortunes, find people, and assess feng shui. She'll just find him! Her eldest brother is disabled and takes his own life? She'll cure him, and he'll reclaim his military honors and become a sought-after general at court. Her second brother is blind and gets his engagement broken off? He'll take top honors in the imperial exams, become a rising star in the court, and win the emperor's favor! Song Ruozhen finally settles into a carefree life with plenty of money and free time, only to wonder why the prince whom the original heroine loved but could never win over has suddenly started clinging to her. This isn't how the story is supposed to go! Chu Junting: A missing father, a disabled brother, a mother sobbing her eyes out, and a heartbroken young woman. Sure, she can hit like an ox and slap a scumbag dead, but I still feel so sorry for her.