She’s 16 and he’s 25 *update*

My friend recently started talking to a 25 year old who lives far away, but still. He wanted full body pics of her and he sent her a picture of him in his underwear with a boner.

She has been talking to lots of older guys recently and I’m worried that shes gonna do things she’ll regret, like send nudes. I just want her to be safe but if I tell her she’ll be mad at me. So what do I do?

*edit

They have already planned on meeting up, just the two of them in a couple of weeks. She booked the ticket to go see him. What does a 25 year old want to do with a 16 year old girl?? Also, he told her the size of his dick and she doesn’t see anything wrong with it. Like why is she so stupid? Can’t she see that he’s just using her? At this point I give up.