DD is 5. She has a friend with whom she sometimes squabbles, like they all do. Had a text from friend's mum asking if I could ask DD about a mark on her DD's coat.
Asked DD and she said her whiteboard pen had been sticking out and caught friend's coat. Replied as such.
Got a massive text back implying my DD had done it through spite after not being invited to a playdate and it wasn't the first time she'd been destructive as she'd broken the top of her friend's water bottle.
I replied saying since neither of us was there, we couldn't really comment and that I would pay for the coat if the mark didn't come out.
Further response saying that isn't the point, she's fuming, DD is spiteful. Left it by reiterating about paying if it doesn't wash out.
AIBU to think a) you shouldn't get into arguments over stuff you didn't see happen when you only have your own child's version of events to go on and b) you don't send a 5yr old to school in a white coat?