Step sister asked to take her virginity!

I have a very good and trusting relationship with my step-sister. Therefore, with all the problems and intimate questions, she turns to me and not to her parents. She said she was afraid of being inexperienced in sex with her boyfriend because she is a virgin. And what was my surprise when she asked to deprive her of her virginity! It's kind of crazy, but on the other hand, I've never let her down before and I'm a good step-brother ...