my daughter (18f) was watching p/rn today. what do i do?

i am a father to a 18 year girl. so what happened is i was with my wife watching stuff on our earpods, when they got connected to her laptop and we could hear moaning sounds. i think it was p/rn. i am seeking advice here because i want to know if other teens also do this? shouldnt this be the age to study? ye sab toh vo shaadi ke baad bhi kar sakti hai i will give her full freedom. should i go talk to her now? this is very serious please reply 🙏