A Magical Bedtime Story, Literally

There are two species of human, one magical and one not. The ones who are magical are hunted like foxes and not before too long they became extinct. Or so they thought. A man and woman survived and both are in love. They had 6 children and enchanted themselves so that when they died they would turn into immortal cats to watch over their descendants and keep them safe. They kept the race of magical people going secretly all the way from the 14th century to the 21st century. But some secrets aren't meant to be kept. When word gets out to the world that there are magical people living and breathing, society starts to panic. Can they fix everything in time and declare peace before the world starts a WWIII or will they end up extinct like the world once thought they were, only this time for real.