I ran across the short story, "His Wife's Deceased Sister" a few years ago when I was participating in Brian Lindemuth's "Short Story a Day" challenge. It was written by Frank R. Stockton. If Stockton's name sounds familiar, it's because he wrote "The Lady or the Tiger?" one of a handful of short stories that almost all American kids read as children. ("The Most Dangerous Game," "The Ransom of Red Chief," and "To Build a Fire" are several of the others.)
"His Wife's Deceased Sister" is about a writer whose life is ruined when he writes a story so popular that no one thinks anything else can live up to it. Read it here.