Where it all began

Mycroft is not happy: growing up with Sherlock and Eurus is definitely tedious and brings its fair share of issues.
When Eurus does the most dreadful thing, even Mycroft can't keep it together. Will the roles reverse and make Mycroft wish he was never the older brother

PS: I obviously don't own Sherlock BBC...I wish.

(I've edited a couple of errors since I first wrote this what feels like an age ago, so I hope it reads a bit better. Apologies.)