In the end she is the one who makes the decisions about how she wants her life to go and her sex life as well. All you can do is give her your story of your experience as in how you took care of her, the emotional situations you had to go through, the good side about it.
Tell her how she is able to share anything with you and that if she is not willing to get pregnant at an early age to let you know when she has had unprotected sex and the steps you two can take together .. For example buying the morning after pill etc.. Also tell to freely tell you when she is sexually active so you are able to buy her condoms.
Talk to her of drinking .. When people drink they can be very horny and men can be more touchy towards her. etcc
Just pretty much be the mom you are, tell her your experience, gain her trust, don't ever judge the decisions she makes. Always give her your advice and just pretty much talk it all like a normal conversation.