Rough Edges by basingstoke [24K]
http://archiveofourown.org/series/4406
Sherlock + John. Friendship/pre-slash. Canon. Humour. Hurt/comfort. Deviance. Family. Violence. Asexual!Sherlock. Black Books crossover. Favorite.
“I want to go home with you,” Easter said to Lestrade. “My family is mean and I’m afraid I’ll disappear.” She ran to Lestrade and threw her arms around his waist, sobbing. John wasn’t sure if it was real. Sherlock and Wollstonecraft could cry on cue, but Easter was only eight…
“She’s shamming,” Sherlock said. “She doesn’t actually believe a word of it.” Easter cried louder. Lestrade looked stricken.
This series of Basingstoke’s is really good.