Having finally saved up enough retirement money without getting to spend it, she unexpectedly time-traveled? And she became the stepmother of four children! With her husband dying in battle, her mother-in-law paralyzed, a dignified generation of assassins fights evil neighbors, digs bird nests, and raises children?! A collapsed starting hand is no problem! She also has a set of good culinary skills! Opening restaurants and raising rabbits allows her to thrive in ancient times! The richest man in the whole village is only the beginning. What? The honest matrilocal son-in-law turns out to be a hidden big shot? Four children compete to call her mom? "The Stepmother Rules the House", the stepmother has money when she wants money, kids when she wants kids, and as for men—line up first!