After Marrying the God of Death, I Began to Conquer the World

My name is Kaloman. I'm a little count who planned to coast through life until I died, and now I'm freaking out. A girl claiming to be the God of Death is threatening me with my own life unless I help her spread her faith. But if I do, there's a good chance I'll be tied to a cross and burned alive. What should I do? Please answer quickly, it's urgent!