She didn't know she owed money.
Yes she did. She was told at least 3 times.
The fact is bread and butter is not enough for a growing child to get them through the day, weather you do that at home I'm sure you give your kids snacks in between and don't just give them a butter sandwich to last them 6 or 7
The children will have had breakfast, and they were fed a jam sandwich and an apple. Presumably around 12. This is perfectly adequate. Might not be the most filling or delicious, bit still would be around 400 calories, which is plenty. Especially if they have a "proper" breakfast and dinner either side. It's not as if they're Olympians needing a 5000 calorie diet. They're kids.
And they would be home around 3.30.
So the most they had to last was around 4 hours, and that was on whatever the mum gave them for breakfast.
They weren't without for 6-7 hours. Stop being dramatic.