I was accosted in the playground recently by someone I considered to be a good friend. She accused my dc of bullying her dc.
She reprimanded my dc (and me) in front of all the other parents.
It was actually for something (on one occasion) I believe to be normal playground behaviour and really trivial. Apparently my DD chased her DS and he didn't like it. According to my DD he never asked her to stop, he wasn't upset or crying. He was laughing. He then went home and said my DD had bullied him by chasing him.
I actually would prefer that friend had referred it to school - as it is she has just taken the word of her dc - not a balanced view - not investigated - just condemned my dd in a humiliating public way.
Whilst I appreciate my dd can sometimes do the wrong thing, I know that the other dc can be bullying and spiteful himself and has been on numerous occasions. I have let it go as I deemed it normal trivial playground behaviour.
Meanwhile all the parents in the playground, after our very public dressing down, for OMG chasing someone are thinking my dd is a child to be avoided.
I am not suggesting for a minute that for your dc, having been injured, action should not be taken.
But my point is that there are two sides to every story. Maybe she feels her dc wasn't treated fairly, maybe she feels you approached it in the wrong way.
Said mother came up to me today and said very cheerily "hello, how are you". Words can't describe how angry I feel.
Whatever, she is probably very upset and hurt herself. You cannot expect to redeem a friendship once this has happened.