The thing that stands out to me is that everyone in this group is constantly in a rush for no reason. Nothing they're doing is important as in urgent, they basically do everything as a hobby. They're rushing to develop the tower, research the tower, research divine power, research blessings, research evolution and now to evolve so they can have Kousuke's kids. None of this really matters and none of it needs to be done any time soon but it always feels like they're trying to get everything done yesterday. Why are they constantly in a rush to do everything when there's nothing actually urgently requiring them?
I thought all of their life spans were increased so they don't have the usually baby timeline that normal humans do. Do they think Kousuke might evolve further making it harder for them to have kids? They've never really even talked to him about if he wants kids. Do they want kids to have kids or do they have insecurities about their relationship and want them more as proof of their bond so Kousuke won't abandon them later? Or is this the author going well all women want kids so these women should want them too?