As the saying goes, if a child is not taught, it's the parent's fault. The first teachers of a child are the parents, and whatever a child becomes is the result of the parents' teachings. A child with no manners is a reflection of poor upbringing by the parents, indicating a failure to establish integrity.
Here, men manage external affairs while women manage domestic ones, but raising and educating children is the responsibility of the Matriarch of the household. If the children lack proper manners, people will criticize, indirectly faulting the Matriarch and questioning her virtue.
Wanwan's words were clearly an accusation of Binbin and the others for being unfilial, prompting people to find fault with their mother.
"Mother..." Both Binbin and Jiaojiao turned pale with shock.
The woman, seeing this, felt both distressed and reassured. Her children, all very good and filial, were only troubled on her behalf.