Hi! I saw your post where someone was looking for a fic in which John takes care of Sherlock's 13 y/o son called Oliver, post-Reichenbach. I know you found a similar fic (where the kid is called Adrien) but I think the one the person was looking for is: "Where you can't quite reach" by SilverDragon00 on ao3 :)
(referencing this post here)
Where You Can’t Quite Reach by SilverDragon00 (T, 55,338 w., 16 Ch. || Post-TRF, Canon Divergence, Depression, Parentlock, Sherlock’s Son, Panic Attacks, Angst, Bullying, Drama, Teenagers) – Sherlock took his life four months ago, and John’s found himself in a pit of self-destruction and depression he doesn’t care to climb out of. Then Mycroft shows up with someone John didn’t even know existed - Sherlock’s thirteen year old son - and asks John to take care of him. John doesn’t know if he can handle living with another Holmes, especially this one who looks so like the one he lost. John has to pull himself together and deal with his own emotions, while trying to raise his best friend’s teenager. Until everything he works hard to create for them is turned upside down by the one person he never expected to see again. Part 1 of the Oliver Scott ‘Verse series
@masterofhounds was looking for the fic, hopefully they see this and will confirm it’s the fic they want!! Thank you so much, Lovely!!! <3
