You can get her pills like my mother did. But it is up to her to take them. Since I can't have pills, I never took them. My adnoids are too big and catch anything attempting to go down my throat. Instead I just used condoms. So far, no issues.
Also teenagers are getting sexually active at younger ages. Even as a homeschooler, my first was at 16. Younger students are getting pregnate. I've heard of a girl in Atlanta getting pregnate at 12. Talk to her and get her some condoms.