I mean she was an orphan without parents tbh
Spoiler Alert
The saintness is related to Nina. Nina is the younger sister of the Saintness and the ML is the king.The king and saintness aren't in a relationship. Got it from the novel reader's.
No wayyyyyyyyyyy
Yup I was also shocked when I saw the spoiler's
Okay, wait, do they have sex, or do they just sleep next to each other, touching?
They just sleep next to eachother touching the saintness falls in love with someone else they do nothing hope that helped
IT IS NOT INCEST.
I think she's their child and she did some magic spell and fucked up and gone back in time ┑(￣Д ￣)┍