DH told DD (7) she could have an ice cream at the weekend after she rode up the hill to our town for the first time without stopping. She didn't eat it as wasn't hungry. DH gave her money to buy an ice cream on Tuesday evening.
Wednesday pm we were out in the heat all afternoon then she had football training until 6. In the car in the way home she drank .75l of water. As soon as we got in, she threw up the water. Kept her home yesterday, fine except she complained once just before dinner that her tummy felt weird, she felt sick and only ate some cucumber and a slice of bread, wasn't actually sick. She's past the 24 hour quarantine and seems perfectly fine this morning. She said she's too ill to go to school, but that I should pack the cool bag for the shopping and she'll bring her money 
I have a history of dislike (atrocious treatment of my elder DC with SN) with the teacher she has today, who is not her class teacher.
Send her in or let her buy her ice cream?