Married a Fox Demon, Awakened a System.

On my wedding night, just as I discovered my beautiful wife was a terrifying nine-tailed fox demon, the Dao Association burst in, ready to execute her! My world shattered. But before I could react, a mysterious System activated: Option 1: Betray your demon wife for billions. Option 2: Help kill her for power. Option 3: Protect her and gain ancient Daoist mastery. My choice was clear, but can a mere human stand against an entire monster-hunting organization to shield the S-class demon he loves? And what secrets does her ancient power truly hold?