In that case, maybe if you keep taking the chicks as they hatch, the hens will keep setting until most, or all, with any luck, are hatched. Then you could let them keep the last ones out. Maybe they'll co-parent, it happens sometimes. Have you marked the eggs they already have, so you'll know when there are new ones to snatch out?
I've got a few hens that you absolutely can't relocate, once they decide to brood. They just wig out. Others, you can stick anywhere, as long as the eggs go with them, they settle right in.