I Transmigrated Into a Book Set in the Seventies and Got Five Powerful Sons-in-Law

What kind of joke is fate playing on her? She was a single woman past her prime, but skipped dating and marriage altogether and suddenly became the mother of five daughters in a period novel. Fortunately, she had a trump card and could still pick up some bargains. Bai Su found each of her five lovely daughters a future big shot for a son-in-law. The eldest son-in-law rose to become a business tycoon. "Mom, would you prefer a house in the capital or in Haishi? I'll pick one out for you." The second son-in-law owns the capital's largest pharmaceutical group and holds a press conference. "Half the shares in my pharmaceutical group belong to my mother-in-law." The third son-in-law, now a renowned film director, refuses to be outdone. "Mom, I'll give you a cameo in my movie, then share the box-office profits with you." The fourth son-in-law: "..." The fifth son-in-law: "..." With every one of her sons-in-law a big shot, all Bai Su has to do is sit back and enjoy the ride as their mother-in-law...