Senses
孝子 filial son (obedient son)
a son who is obedient and shows deep respect for his parents
孝子 son in mourning
a son who is in the period of mourning for his deceased parents
孝子 child-serving parent
(slang) a parent who dotes on or spoils their children to an excessive degree
孝子 filial son (ritual self-reference)
the way a son refers to himself when performing sacrificial rites for his parents