Lol at the people who said they'd turn her down. Sure you might think you wouldn't and can say so on the internet but if you were in the moment and she wanted you I absolutely guarantee you'd do it. I don't think a mortal could turn that down if the opportunity came about.
I've been in the situation (not necessarily with her, but with another extremely attractive girl), and I flat out said no. Just because you don't have that kind of willpower doesn't mean nobody does..