Adjective
Unsuitable to a son or a daughter; undutiful; not becoming a child.
Source: Webster's dictionaryExile was inflicted for incest with a daughter; disinheritance for incest with a stepmother, or for repeated unfilial conduct. Source: Internet
Enslavement befell the extravagant wife and unfilial children. Source: Internet
Slaves were often adopted, and if they proved unfilial, were reduced to slavery again. Source: Internet