Help it's important

So my old bestfriend( really long story into why we aren't the best of friends) ... Well she told me that she's been having sex with multiple dudes since we've stopped being friends... One of the guys was at our school and she had sex there and almost got caught... Even though we aren't friends anymore I really don't want her to go down that path.. Like her parents are kicking her out of the house bc they found out how many guys she's been messing with. I don't know what to do. I know she's her own person but it's hard for me to just watch her go down this path.