Stepsister Survival Manual

I originally thought that I would die of old age in the palace, but I didn't expect that getting married would be such a hard life. Her husband eloped with the widow on their wedding night, leaving behind a pile of debts and old, weak, women and children for the newlywed wife. There are several levels of parents-in-law above, and there are cheap children below, and there are groups of concubines. When you open your eyes, there are dozens of mouths waiting for her to make money for food. Finally, the family has improved, but the man comes back shamelessly with his lover, and even chases her down the hall...