Basically, there were three best friends. Now dd has been ostracised (she says for the last four days). Didn't now until today, when she looked so sad in the back of the car and when I asked her why said 'I'll tell you when we get home'. Question is, would you mention it to the mum of x (who I'm quite chummy with) or leave well alone? After all, she can't make her play with her.