Payment issue

[Gloucestermom]

This morning, she dropped off at snack time, almost 2 hours later than usual. A baby started crying, I walked over and she ducked out without even saying goodbye to her son.
Today, at pick up, I said 'So, what are you going to do?' and she said all in a huff 'Well, we're going to pay you, it'll just be next Friday.' I shook my head and said no, I can't wait that long. She said 'Well?' and I said 'Well, that's it then, I'll get you his stuff'. I already had his diapers and wipes ready in a bag.
I'm amending my contract - 2 days of late fees, then on the third day if they haven't paid then I'm locking my door! Never taking payments after the fact either, even if it is for just a couple days. I have learned my lesson.