I didn't work the week before Christmas as my ds was poorly. I informed parents and gave them the choice, saying I could have their children if they needed me, but all decided not to send them. Now I'm not sure what to do with my invoices. Should I charge as I offered to work, or not charge as my ds was ill?? I was available, but had I worked, their children would probably have caught the bug and been ill for xmas. Thoughts please :)