There have been multiple games where you have to beat up monsters to save the world and somehow manage to settle down. We have housing in game here, and don't give an excuse that we can't even develop relationships with another person.

Take for example, Rune Factory. Yes, you are busy with saving the world and all, but you still manage to find time to find a lover and build up your relationship with them. Then you get married, if the circumstances allow it, event happens, kid is there. Even though you're busy saving the world and all. This is one of the many games that others have sampled where you are saving the current area and stuff, but still manage to have a family.

So yes, Kids could be considered an option. I mean, we can Eternally bond to another Adventurer. I would personally love to adopt a child if it was a possibility! Even joked with some friends who just got eternally bonded that they'll be busy with their kids.