ʕ•ﻌ•ʔ

I think they aren't blood rate, it just the way he calls, for example, 'brother'

yeah, but I think in the past chapter I read a word cousin, nahh or I think I misread it.

You're not the only one. I remember reading cousin too. That's why I'm confused rn (ب_ب)

probebly mistranslation

me too hella confused but yeah probably mistranslation, btw translator do his best fightingg!!(๑•ㅂ•)و✧