The Goddess and the Demon Concubine: the Heaven-Defying Poison Doctor

I thought it was a rebirth, but it turned out to be the reunion of souls carrying destiny; I thought they were mortal enemies of the two countries, but they turned out to be lovers who couldn't love each other, and had been entangled for three generations; I thought they were spiritual pets, invincible plug-ins, and lucky, but they turned out to be the puppets of the witch clan to change their lives and the monster clan to resurrect... The sky is unkind and the road is unfair, so don't blame her for changing her destiny against heaven and pointing her sword at the sky. How about a divine princess? When it's time to become a demon, you will become a demon! How about the young master of the demon world? When it's time to become a god, you will become a god! What about the princess of the human world? When it is time to destroy, destroy them all! After going around in circles for a hundred thousand years, in the end, how should we make a decision?