Title: Too Much to Hold
Author: Sparkle_Free
Fandom: Sherlock
Characters: John/Sherlock, OMC (child - Julian)
Warnings: PG-13, disability/mental illness (autism, down syndrome), adoption (guardianship), mention of slash
Length: Novella
Status: Completed
John becomes guardian of an old friend's autistic son, and learns something about Sherlock's diagnosis along the way.
At AO3
Wonderful story - I never was much into autistic!Sherock, just didn't fit IMO. This story, though, made me reconsider it. There is some merit in it. And if you like drama, Johnlock and childfic, here you go.