As for Persephone, there are two different versions of her story where kids are concerned because a lot of people fight over this

It is either she really wanted children but has never been able to bare any with Hades (Which makes sense)

Or that she has had two children, both from Zeus because of rape. Most believe that this is not true and that those children are the children of different goddesses. Many to debate on this. I honestly think the first one is true just because Demeter was so over protective that I don't see how Zeus could have caught her in a cave alone.