Spoiler down below....
Navier will become pregnant in the future... so navier is not infertile and Soveshit is the one who is infertile..
So Soveshit will have doubts about who Rashta baby father is.
Then they will perform some kind of blood test in the temple to determine the paternity of Rashta's baby.
Turns out Soveshit is not the father... And the real father is Alan, her previous lover..
That scene is Soo satisfying, many nobles are watching the paternity test and when Soveshit learned that Rashta is lying. He sent her to be imprisoned..

Premature birth? She's been the size of mountain for chapters! You want me to believe things like this illustrators, be frickin' realistic with the size of the baby bump! Lord, this is not the first time someone went from flat tummy to absurdly swollen instantly in these mangas. Come on, people.