His Mom Ling Shih-ying knows that the child did not do it on purpose, but simply has poor control. Yet in front of others Ling has no choice but to discipline him in order to show that she is a good parent.
凌士英知道兒子不是故意的，只是控制能力較差，但在人前卻不得不忍痛罵他以示家教。