i for one fully support a pregnancy feature. the entire point of sex is to have kids after all, the pleasure is but an incentive. that being said considering kazuma's personality i do agree him wanting kids seems a bit off... unless he's not the one who has to take care of them!
in other news,
the only good mom candidates imo are yunyun, chris, wiz (maybe, and that's if she even can she even get pregnant), and lalatina (considering she actually does help take care of kids occasionally).
that said, it would be interesting if
by having a kid aqua mellows out, stops drinking, and stops being super impulsive like she sorta does late story. only then could she join the ranks of good mothers!