I have namechanged - as I feel a bit silly asking this because I am rather worried.
DS (5) and I were recently visiting a friend who has a DD (just 3).
They were playing doctors and nurses. It went very quiet and when I looked I saw DS sitting over friends DD. They both looked up startled and guilty. Mate's DD was lying on her front and quickly puled up her trousers.
I couldn't quite see from my viewpoint exactly what was happening but she did have her bum exposed. I think DS had a play syringe.
They both said they weren't doing anything and when I asked DS about it later he didn't want to talk about it.
I was shocked and worried at the time and didn't tell my mate, as I think she'd be the type to read more into than even I am and would possibly make reasons for us not to meet up for a while.
Please reassure me this is normal behaviour? If not, what should I do?