My Ex girlfriend is harrassing me and trying to extort me ?

I was called my ex girlfriend who stays in a different city after a longtime and said she wants me to come to her for a few days as she needed someone as she was feeling lonely. I went and we stayed in a hotel room. That night we had sex thrice. When I touched her she initially said we just friends so stop but then stared making moves herself of getting aroused, removing her clothes on her own. Even saying "Fuck me as much as you want". After we were done she said, "you fucked me thrice like a