I don't know what to do. DD is friends with two girls (all of them are 5 or 6). DD told me the other day that she saw girl A put her hand into girl B's private parts when she went to the toilet. When DD asked girl A what she was doing, she said 'nothing' and left the toilet. Girl B started crying and told DD that this girl kept playing mummies and daddies and pushing her fingers in and hurting her. This happens every day at school. She also said that girl A had told her that if she told anyone that she would 'hurt her hard in her tummy'. When DD told me this I was obviously shocked - I rang girl B's mum and told her this. She has found out that this all started when her DD was 4, and has been happening whenever they play together. Girl B's mum has confronted girl A's mum, but doesn't think she has spoken to her daughter.
I asked DD if girl A has ever tried to do this with her, and she says no. However, DD doesn't like going over to her house to play, but will only say 'because she doesn't play nicely mummy'. Now I have had a phone call this evening from girl A's mum asking if DD can go over for tea this week. I have made an excuse, saying that the girls have fallen out, but I really don't know what I should do - should I confront her myself and let her know that I know? This seems completely abnormal behaviour from a 6 year old girl, and I am worried sick about it. I wonder if girl A's mum thinks it is just a harmless game they have been playing, and is in denial about this.