The real question is whether she paid for the dolls admission or not? Perhaps, her children are cyborgs? Perhaps, she is a hollywood makeup artist who disguises her children as dolls to avoid paying their admission?
You should have tried to abduct one of them, because if they are just dolls you only would have been charged with misdemeanor theft. If they were cyborgs... honestly I am not sure what the penalty would have been. But if they had in fact been real children disguised as dolls, then there would have been one less nosy, presumptuous eavesdropper in public aquariums.