Hello, fellow mums, I need some advice. So, my soon-to-be 18-year-old daughter plays tennis recreationally quite often. Apparently, about a month ago she met a man at the sports center they both go to to play tennis and they became "friends". The guy in question is 31 years old. Daughter told my husband and I about him a couple of days ago because she wanted to know if we'd like to meet him / if she can bring him home; plus she said she doesn't want to hide anything from us. From what she told us they hung out together often outside of tennis-playing hours. We were obviously taken aback by the age gap and told her we'll think about it. We explicitly asked her if he's a boyfriend and she firmly said no. We don't really know what to do: we can't ban her from seeing him, according to her they're not even in a relationship, but we don't feel comfortable "approving" this either. Should we agree to meet him? Any suggestions are welcome.