This house seemed to be a family. Aunt Shuihua, an elderly woman, a middle-aged woman, a young bride, and two men, as well as two boys—a total of seven people.
They were indeed a family. Aunt Shuihua was the mother-in-law. The two men were her sons. The middle-aged woman was Aunt Shuihua's eldest daughter-in-law, and the two boys were her grandsons. They were a family of four. The young bride was Aunt Shuihua's second daughter-in-law, and she hadn't had a child yet.
Of course, they weren't called Aunt Shuihua and Song Shu at home. Those were just aliases they used when outside, even at home, they used these aliases to avoid accidentally slipping up when they were out.
As soon as the two returned, the eldest daughter-in-law came up to greet her husband and mother-in-law, saying, "It's so cold, I've heated some egg water for you."
