Exactly this. This is the second time she has done this. One of my dc is 10 the other 5 and is diagnosed ASC. I was upstairs tiding and heard nothing until my dc were banging on the door to be let in. We lock the door when we are in by way of habit as it's safer with a child that can do a runner.
Help, how on earth do I handle this one. All suggestions gratefully received before I shoot my mouth off!