The Glimpses of the Moon by Edith Wharton

IN the persistent drizzle of a Paris winter morning Susy Lansing walked back alone from the school at which she had just deposited the four eldest Fulmers to the little house in Passy where, for the last two months, she had been living with them.

She had on ready-made boots, an old waterproof and a last year's hat; but none of these facts disturbed her, though she took no particular pride in them. The truth was that she was too busy to think much about them. Since she had assumed the charge of the Fulmer children, in the absence of both their parents in Italy, she had had to pass through such an arduous apprenticeship of motherhood that every moment of her waking hours was packed with things to do at once, and other things to remember to do later.