Re: hyper pregnancy rpg maker games?
That many children at once? Ouch.
All I can think of that are likly to fit the bill will be ones where you're egged and birth maggots or the like, of course that may not fit your tastes.
if it does though from what I can find in my collection:
Iris action, one of the game overs has her egged and you can leave it running as long as you want with her poping one out at five second intervals.
Other world quest: pregnancy is things like worms and maggots though but these are born in groups of 5 or 6. It is loli though. Didn't realise I had it.
If eggs are fine. 'The bizzare adventure of adventurer Hinako 2' (I think it translated as) has the girl birthing a few eggs.
Thats all I have that I can suggest I'm afraid.