I know that I should just move on....and for the most part, I do...but I don't like "punishing" the child just because the parent can't get their shit together and get here at a reasonable time. I have one 3 year old who comes wed-fri and I plan the really fun and cool things we are going to do for thurs and fri because those are the days I will for sure have the full house. We do other things of course on the other days but if it's something new or out of the ordinary, I do try to plan it for when all kids are here. With this past client though, I did just have to move on and do our stuff or else it would never get done and that was punishing the others!