Got an email from the dad tonight saying they are leaving immediately, a few other nasty remarks in their blah blah blah. I told them fine leave, they are paid up to this week, I won't send them a final bill they don't owe any more.

I'm both sad and relieved. It's disappointing adults can behave like such petulant children when they don't get what they want. Never mind you live and learn.

Thank you for all your support!