My Baby Is So, So, So Adorable

She was a genius assassin who wielded battle aura, poisoned to death by her own sister. She was the useless spirit girl of the Fang family, pregnant before marriage and cast out of her home. When one becomes the other and opens her eyes again, her brilliance blazes forth. Her talent is breathtaking, and all the world bows before her! He is a mysterious Demon Lord, with countless identities and an elusive presence, yet he dotes on her beyond reason.