語句
冇親屬關係 not having a close family relationship with
你同佢非親非故,做咩要咁幫佢唧?
你同佢非亲非故,做咩要咁帮佢唧?
nei5 tung4 keoi5 fei1 can1 fei1 gu3, zou6 me1 jiu3 gam3 bong1 keoi5 zek1? You don't have a family relationship, why are you helping him so much?
Definitions (Wiktionary)
phrase, idiomatic, of two people
to be neither relatives nor friends