@bvdaf
That's a messed up view on things.
Ones culture shouldn't define who you are to marry.
If anything It should only help you in finding the one you love.
If you don't love someone then forcing them into marriage is a terrible thing to do.
He loves her as sister, and nothing they do should change how he feels about her.
It's the main reason arranged marriages are not really a thing anymore.
Because with so many people running away from, killing themselves, and eloping that there really wasn't a point.
I'm on the MC's side in that they didn't even ask his opinion on the marriage.
They just forced it onto him, and his sister is a little creep who should wise up.
Just expecting somebody to be okay with something because it's the norm is the messed up thing.