Both 17. Sometimes she's been going out to drink with an older dude (19). Today she asked me if he could come over to her place, but while her parents are at home. I answered, sure, I'll be there in 30 minutes. And then she said the question was just hypothetical and now she's going to eat out with him, which she did several times. I don't think she's going to cheat but he used to have a crush on her so he might try something while both being intoxicated. What should I do?