Time to be open honest and up front now. "That age" is upon you all and it is better dealt with stressing your family values, beliefs and a lot of the cold hard facts. She might already know a lot but make sure the truth comes from you first in an open, safe, judgement-free. very frank discussion, even if you have already had "the talk" with her.
It's difficult to compete with hormones, but a well educated teen is better equipped to deal with the topic than one that isn't. 4951