I Transmigrated Into a Book, Not to Be a Doormat: I'll Handle the Insults and the Fights

【Period setting + villainess + foil couple + the heroine never takes a loss and fights back when challenged + reforming the whole family of workhorses】 The villainess Jiang Mian transmigrates into a period novel, becoming the cannon-fodder female supporting character in the heroine’s foil couple. The heroine grew up without a mother, but her father doted on her like a treasure. The supporting character also grew up without a mother, but her father beat her until she ran all over the place. At last, she gets married, only to find herself marrying into the same family as the heroine, to two cousins. The heroine marries the younger cousin. Her parents-in-law die and no one is left to manage her, so the young couple lives happily. The original owner marries the older cousin. Her entire in-law family works like oxen for the younger cousin’s household, and life is miserable. Her mother-in-law’s catchphrase: “I’m going to wash your younger cousin’s wife’s clothes. She has it so hard!” Her father-in-law’s catchphrase: “Take this meat to your younger cousin’s family. We’ll make do with bran and vegetables!” Her husband’s catchphrase: “Just think of this money as a loan to my younger cousin. He has no parents, a lot of pressure, and a hard life. I have to give him a hand.” Jiang Mian: ??? You love hardship, huh? I’ll make sure you get more than you can handle!