My daughter is 18 and has plenty of friends a similar age to her (the oldest is 21). However, there's this 25, almost 26 year old who seems to be integrating with her and her friends an awful lot. She is often there on nights out with, has been at sleepovers, etc. it's rather strange to me. What I like even less is it's not like she is particularly delayed for her age (she lives on her own etc) and often DD and her friends will be at her place or 2 of DD's friends are sixth formers/in college and she has picked them up from literally school before. I just find it all a little strange. I can't see what a 26 year old has in common with teenagers.