read the spoiler thread of the story a few days so bear with me:
Spoiler!
While on the pilgrimage thing, they get attacked. MC becomes crippled, I forget if both of her legs or just one got really damaged. She was essentially dying. But she managed to survive, although she could no longer walk properly. Because of this, the MC gets married off to the ML (the half-sister's fiancé). Also it's implied/mentioned that the MC's mom was responsible for the attack. She used her own daughter to hide this since no one would ever think that she orchestrated the attack which left her daughter the most injured.
if you need more spoilers just search up the title on novel updates forum :)
Spoiler!
if u see me reading the most obscene bl... no u didn't <3
