
Wait, I'm so confused. When I read the raws for chapter 205, it seemed like Tanjiro and Kanao's descendent and Nezuko and Zenitsu's descendants were dating.

I am also "asian". U don't have a monopoly on "Asian". Also, non-sibling incest is quite common in most asian history. Back then, they used to call it keeping bloodline pure.
As long as u don't marry within the family (as in ur immediate siblings, paternal uncle/first cousins etc) it was fine. Like cousins on ur mother's side, father's sister's side are not considered as YOUR blood because they fall into a different family tree.
Even now, in india, it's legal for first cousins to marry as long they are not paternal first cousins (archiac law from begone British Raj) (my aunt's brother married his maternal first cousin and it's legal, so it still happens but is extremely rare)
Modern people think it's weird, but if u go by history, it's not that weird or strange or rare.
I hope that no good of a mother slowly drowns in acid, burning and melting away her insides as she drowns in it as it slowly takes it time to break away at her flesh then bones.
Amen