@SosSam
To be fair, I would have been furious too! But also very unreasonable.
I would be very angry, that I had not been told, during or after, angry that it was allowed to happen, angry that I wouldn't have been able to do anything anyway .. So in other words, the same emotion that I get if I turn my back for 2 secs and DC gets hurt or does something silly. Because that is how I react when I get scared, even after the fact.
DC hit his head at daycare once and got a massive lump, and carer sent a text with pic saying no worries, nothing to be scared of, but he had a little accident, and I instantly replied "what the fuck happened?!", I then very sheepishly followed with a new text saying sorry, bit too fast to respond, how is he? Should I pick him up?
What I am trying to say is, it isn't unreasonable to be angry or upset, we are talking about our DCs, we wear our hearts on our sleeves and of course we get emotional. It is unreasonable to "hold a grudge" or lose trust when the other person in fact acted correctly. Which I am sure you will feel when you get a bit further away from it. Perhaps next time it should be agreed beforehand, that you are one of the mothers that wants to know? Just so that you know there is a clear agreement?