父慈子孝

Etymology
From :

Idiom

 * 1) the father is loving towards his children and the children show filial piety towards their father
 * 2)  the father and child are engaging in family quarrel either verbally, financially or physically.

Usage notes
Even though the traditional meaning of the idiom is still understood in modern day Chinese, the sarcastic usage is becoming more mainstream in Chinese popular culture, this means extra understanding of the context is required when this idiom is used.