She gives him a choice

"You are one of the lucky ones," She declares to him. "You can spend your life worshiping me. I will not touch you; you will be spared. I will need you to create more human stock with other survivors. You will tell no one of this, or else." She turned her gaze to a metal pan in his kitchen. For his benefit, she went slowly, allowing him to witness the energy focusing in Her eyes, before her twin laser beams incinerated it into slag.

"Or, you can choose for me to have sex with you," she smirked. "At any point, you can ask me to stop and you will become a worshiper, just as I explained before. But if you cannot muster the will to tell me to stop, then I will destroy you in any way I please. What do you choose? You have ten seconds."