You are being USED! If you really want to keep this disrepectful family, then tell them that pick up is 530, and after that there will be a late fee, also they need to ask if you are able to take the kids that late for a full week (there is no way in hell I would agree to that. I have my own family and needs, and a 12 hour day for a week and a half....and if I agreed they would pay double in advance!) or you could just terminate them, and that is what I would do, and by that, I mean it would be immediate, they would not be back tomorrow!