I totally agree with 5LM. How do you know she wasn't going to try and get through the day only to run to the bathroom at 7:10 throwing up. I would have likely done the same thing.

I also have a clause stating I have an alternate who I use on occasion. Does that mean my alternate WILL be used? NO. I had a daycare parent get upset at me once because I closed due to doctors orders. I had an insect bite on the back of my leg that had become infected and I was told by the doc to close the next day and to come in again in the morning as I could potentially get blood poisoning. My alternate does not feel comfortable looking after the kids for a full day and I didn't "look" sick. Parent was upset. It was what it was. Sometimes we have to look after ourselves first!

Pay what you owe and move on