I wrote four stories that might be what you are looking for. In them, Lois and Clark have two sons, one of whom (Todd) has autism. They are, in reading order:
The Diagnosis The Not-So-Great Escape Echolalia Jerome's Wedding Each story is told from the point of view of a different family member.
Joy,
Lynn
p.s., Then again, since L&C definitely knew that Todd was their in my stories, this probably wasn't what you were looking for, after all. Sorry about that.