Our au pair has a super swanky iPhone 6 Plus. Last night while she was babysitting, she sent me a text saying that the screen was broken. Her story last night was that DS pushed her and caused her to drop it so we are responsible for paying to repair / replace it. This morning, she said DS was blocking her way and she dropped it trying to get past. This morning I asked the DCs individually (before they had time to speak to each other) to tell me what happened to the phone. Their stories were identical: her phone was in her pocket and it fell out as she was going downstairs. This sounds entirely plausible. He phone is huge, her pocket is small. Two thirds of the phone sticks out of the top of the pocket of her jeans. I asked DD where DS was when it happened and she said he was upstairs. Given that she would normally take any opportunity to get DS into trouble, her story seems believable. DS is an anxious child and I would have expected him to look worried and guilty this morning if he had done something wrong. He didn't. Now I'm left with a dilemma. Who do I believe? I don't want to be the kind of parent who is blind to their DC's faults but I can't see much evidence that they are not telling the truth. The story about DS pushing her sounds implausible because it would be totally out of character. On the other hand, if I take the DC's word over the au pair's and she's telling the truth, the trust is broken.