A moment ago she was stood in the living room discussing swaps of high school musical stickers with her sister. They didn't argue and dd2 said that dd was fine when she went out to the garden but very shortly after I heard Dd1 sobbing in the garden.
I went to ask her what was wrong and she ran upstairs telling me to leave her alone and nothing was wrong.
But she was really really upset and I have no clue why.