King shit didn’t divorce navier because she is infertile, he did it to make trastas baby a legitimate heir. His plan was to then divorce trashta and remarry navier, which is why he is panicking about navier already being married to someone else.
I think king shit was using trashta from the start to get a baby for navier or at the very least after they found out trashta was knocked up.
Navier’s position would probably be threatened because she didn’t produce any kids and it seems that king shit wants to be with navier in a lovey dovely way like he is with trashta. Which is why he wanted her to act like trashta (dumb and naive), without even realizing how demeaning that is to navier.
But little did he know that he’s the one who is infertile, and that trasta’s kid isn’t his, when navier gets pregnant

YALL BTW THIS IS INFORMATION FROM THE NOVEL!!
I CANT NOT WAIT FOR TRASHTA TO DIE ALBFJENR and ergi to expose that little bitch