Difficult Situation!! any advice would be great

[happyheart]

I know 2 weeks notice is generally the norm but I know with these parents they will use that 2 weeks to their full advantage and bring their kids 12 hours every day. I know they both have car seats in their vehicles as one will often do drop off and the other will pick up, knowing where they work i'm sure they are not able to trade out the car seats during the day. I feel like I have put up with enough from them and i'm not willing to risk them bringing their kids 12 hours for the next 2 weeks just so they can "get their moneys worth". The hours the mom works she would have more then enough time to drop offand pick up within the new hours if they did need extra time they can pay more for it. She just chooses not to pick up at a reasonable time right now because they are taking severe advantage of my kindness and generosity. I am not willing to sacrifice my time with my family or my house and my own perosnal time any longer. If they don't like it they can feel free to go find a provider who has no backbone who is willing to be taken advantage of for $3 an hour 12 hours a day per child. Its just not worth it to me at this time anymore.