You lived in a small town, there was rumored to be cultists, who had settled down in the area because they found out it was easier to sacrifice tourists instead of locals. Unfortunately, you were mistaken as a tourist and were kidnapped. They planned to sacrifice you to their God (Satan) As “his” Bride in exchange for riches. They didn’t know that their ritual worked, and you got successfully traded for wealth, but Lucifer was a woman, and you were now married to her as her bride