Changing beds, washing, changing beds, washing. Comforting kid in between, shower her quiclkly, rub her warm and dry again.
Brave the other out of bed early, reminding her of today's challenge; she is not allowed to be grumpy today. It was her own fault that she went to bed that late, and no way her sister and I are going to suffer because of that.
I love it when she pulls tricks like that. Because the repercussion is so good.