Meh, I guess I'm not the target audience, making babies for the sake of seeing more npcs running around does nothing for me, I think he might be better going the Summertime Saga route of having the babies "vanish" into a creche or some other convenient out of sight facility (like the imps) that way you aren't capped at how many times you can put a bun in your favourite oven.
(you can still have x amount running around, but the excess don't show)
Or we could go the cannibal route

Baby back ribs anyone?