>>689 さんの、「アンがマリラは『妄想』をしないのかって聞いたら…」っていうオリジナル作品の元ネタはここかしら

ANNE OF GREEN GABLES　Lucy Maud Montgomery　【 Project Gutenberg Version 】

CHAPTER VIII　　Anne's Bringing-up Is Begun

"Do you never imagine things different from what they really are?" asked Anne wide-eyed.
"No."
"Oh!" Anne drew a long breath. "Oh, Miss--Marilla, how much you miss!"
"I don't believe in imagining things different from what they really are," retorted Marilla.