@jewj don't waste your time, the latest LN translated chapter is 154 and there is no divorce.
The plot is stupid and drags on and on..., the FMC's a doormat most of the time.
She just puts up with everything the king and concubine throw at her,
A good review from novelupdates:
From the first chapter in the webtoon the author obviously knows how much bullsh*t they're going to feed us,
so they showed us a glimpse of the divorce in the beginning as if saying:
"we're going to beat the crap out of this main character so here's a ray of hope for you to keep reading our stuff",
and then they proceed to make way over a 100 chapters of a neverending cycle of nonsense.
If you're into stories where the woman gets treated horribly 100% of the time,
while some obviously cunning bit*h takes her place yet somehow, magically,
no one notices not even the husband who rules an entire effing empire and he gets to the point where you doubt if he has an actual brain...
well if you're into that then this is a story for you. If not, heed my warning and stay away