118, you are really ruthless!
Yes, Mrs. Xu did not have only one son, Zhao Chunbao.
But after Zhao Chunbao got married, Mrs. Xu divided the family property among her three sons and followed Zhao Chunbao, showing indifference to her other two sons.
Mrs. Xu's favoritism also gave the two daughters-in-law new reasons for resentment, and they weren't pushovers. They tightly controlled their own husbands, forbidding them from dealing with Zhao Chunbao's affairs.
Even after Zhao Chunbao got into trouble, they each took their husbands back to their maternal homes, turning a blind eye to Zhao Chunbao to avoid any trouble,
Thus, to this very moment, Mrs. Xu's two sons remained in hiding, as if they did not exist at all.
However, Zhang Xiaoying's reminder only led to Mrs. Xu's self-mockery, "Their wives are tough; it's not so easy to take advantage of them, and besides..."
She had no face to seek out her two older sons.