What is the short story about a fantasy author in a Gothic world writing about our real world?

Speculative fiction story where unsuccessful fantasy author is living in a Gothic world and writing about our world. His lost lost brother comes back,

Speculative fiction story where unsuccessful fantasy author is living in a Gothic world and writing about our world. His lost lost brother comes back, there's a mad relative in the attic, the eyes in portraits seem to follow people, and many other Gothic tropes are present in the story's "real world." The author's "fantasy" reads like our realism - there's a married couple making toast.

or:Speculative fiction story where unsuccessful fantasy author is living in a Gothic world and writing about our world. His lost lost brother comes back, there's a mad relative in the attic, the eyes in portraits seem to follow people, and many other Gothic tropes are present in the story's \"real world.\" The author's \"fantasy\" reads like our realism - there's a married couple making toast.

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