To cut a long story short I need to nip it in the bud now. I don't want to.share the school run with someone who never takes their own kids and gets her parents/neighbors/random people and me. She asked me before Xmas if we could come to an arrangement but I feel that "arrangement" is just going to be me ferrying her kids about for free because I genuinely feel that she can't be relied on to ensure my lot get to school. So how do I make it clear it can't go on?