Honestly I wouldn't ever think of hermione thinking about sex. She's not that kind of girl. Anyway any 16 year old knows about prostitutes. This is a 9 and up game. Please think about that.
There are a lot of stories out there that wouldn't be suitable for a 9+ game, but if you insist, I'll put an age rating on the story
Make a story that doesn't have the words sex, virgin, prostitute, dick, *****, suck, etc., and I'll like you more.
Anon, you should really take this to www.fanfiction.net as this is a 9+ game, you can't just slap a 13+ sticker on it. That's like having porn in kindergarten with an eighteens notice on it, it's just not done. Plus you'll get a lot more Harry Potter fans on that website, it's got a huge HP community.
I'm pretty sure there's probably a guys and girls one... Or some spell where only one gender can be in there at once. Really, they don't just want to openly invite them to get pregnant.