Mmm, maybe not so much as culture but by taught greed...
Children are told to fend for themselves..
If you notices the siblings from the same mother is protective of each other but all the half sins are visious.
It's a recurring trope I am noticing. Especially the behaviours of the fathers willing to discard their partner and children for the sake of their new lover and even prefer the children that aren't even theirs but their step children??
To the extent the father physically abuses and humiliates their child in front of their new spouse (to the spouse's and their childrens' glee).
Yerp!
And it might be because this new spouse can give them even more then the last...
I think it's because of the authors' lack of imagination. They are like "we want a tragic background for the MC, what do we do?
If it's a male MC, usually they go for killing his parent or sibling and rarely for a bitchy treacherous sibling.
If it's a female MC then bitchy sister and bitchy stepmom 99% of the time"
very true...
lolz, you should watch a few edo era korean dramas... veyr much like this but SO intence
Why are the sisters in these manhuas ALWAYS nasty and evil. Willing to betray and torture their kind for the sake of men.
And why are the men so fickle and foolish to prefer these type of women?
Is this a cultural thing?