Hmm, only issue with this scenario is... Demeter could just use her full power for a few seconds and obliterate Enyo's mortal form, causing both of them to be sent back to the heavens. That would cause her familia to lose power as the falna is sealed, but that would give them a chance to escape and survive. Would be hard for the city too, foodwise, with her suddenly gone, but I still think it would probably be better than just agreeing to Enyo's brainwashing/breaking while watching her captured familia being slaughtered...