hmm
i'm not sure there is anything you can do.
i'm a 17 year old male teen, still a virgin and quite happy that way for the time being, my sis however she's 15 and not a virgin, go figure lol
ermm i'm not sure what help this will be, but i found a site called body teen.
have a look and see what you think its for teenagers and i think it does have some useful things on it. if its any good then you could introduce her to it, if it isnt then dont lol.
www.bodyteen.com
hope this is in some way useful.
but please try not to worry, remember that no matter what YOU ARE THE BEST MUM YOU EVER COULD BE
if anything does happen, its not because of you remember that. I think that its best to try and find a ballance between pressuring her, and giving her freedom of choice, that means alot to teenagers especially younger ones i think.
again i hope it helps.