The Enchanted April by Elizabeth Von Arnim

Scrap wanted to know so much about her mother that Arundel had presently to invent. He would talk about anything she wished if only he might be with her for a while and see her and hear her, but he knew very little of the Droitwiches and their friends really -- beyond meeting them at those bigger functions where literature is also represented, and amusing them at luncheons and dinners, he knew very little of them really. To them he had always remained Mr. Arundel; no one called him Ferdinand; and he only knew the gossip also available to the evening papers and the frequenters of clubs. But he was, however, good at inventing; and as soon as he had come to an end of firsthand knowledge, in order to answer her inquiries and keep her there to himself he proceeded to invent. It was quite easy to fasten some of the entertaining things he was constantly thinking on to other people and pretend they were theirs. Scrap, who had that affection for her parents which warms in absence, was athirst for news, and became more and more interested by the news he gradually imparted.

At first it was ordinary news. He had met her mother here, and seen her there. She looked very well; she said so-and-so. But presently the things Lady Droitwich had said took on an unusual quality: they became amusing.