Hi. Just read your post. When I was at school no PE kit meant underwear - I didn't realise it still happened these days. I had to do it a couple of times and it was very embarrassing! It depends on how you want to proceed - 14 is quite old to be running about in underwear. Were there boys in the lesson too? Was it indoor or outdoor? I'm sure as she was wearing a shirt on top she was more covered up than if she was swimming, but some girls knickers can be quite skimpy these days. Probably depends if she wants you to take it further too?