"And at this hour of the day I don’t suppose you’ve a single one left, have you, Lily?" she plaintively concluded.
Mrs. Fisher exclaimed in surprise; and with a gesture toward Mrs. Jack Stepney and Mrs. Wellington Bry, she added plaintively: "We’re starving to death because we can’t decide where to lunch."
She looked so plaintively lovely as she proffered the request, so trustfully sure of his sympathy and understanding, that Trenor felt himself wishing that his wife could see how other women treated him—not battered wire-pullers like Mrs. Fisher, but a girl that most men would have given their boots to get such a look from.
She turned back, fixing her plaintive eyes on Gerty.
There are no more uses of "plaintive" in the book.