Since the actual yet unofficial reason is her supposed infertility, it is in her best interest not to give away too much information. If people in the Western kingdom believe it, they would naturally oppose her remarriage to their king. After all, just as Sovieshit, Heinley also needs an heir since his deceased brother didn't have children.
Oh yea i forgot that infertility fact since i know it's not her but that jerk who's effected. But she doesn't know the truth herself even tho i remember her rejecting him when people say she's infertile... The thing is Heinley doesn't know that? Or does he know by his friend who helped Trashta
I was wondering about that too, actually.
Gosh look how they're bitching about her remarriage while that asshole comes up with Trashta just fine :) Well Navier likes that country so she wouldn't publish an article or report over the fact it's that asshole who broke up with her to not make citizens hate him as the emperor