Patty's Summer Days by Carolyn Wells

Nan was a born nurse, and, moreover, she had sufficient common sense and tact to know how to deal with nervous exhaustion. Instead of discussing the situation she said, cheerily, "Now everything will be all right. Hilda will look after the stars and wands, and you can have quite a little time to rest before you go back to the schoolroom. Don't try to go up to your room now, just stay right where you are, and I'll bring you a cup of hot milk, which is just what you need."

Patty nestled among the cushions which Nan patted and tucked around her, and after taking the hot milk felt much better.