I have sex with my 18-year-old Christian friend, every day she wants more and more sex

She is a friend who has just turned 18 years old, she studies medicine, we have known each other for a couple of years because we go to the same church, she already told me a long time ago that she liked me, I had to wait for it to be legal to finally be able to her properly, the wait was worth it, Now this girl is getting addicted to me, her boyfriend thinks she's in church.