You can imagine the Christmas dinners

Mycroft said it; 'you can imagine the Christmas dinners'. The answer, is simple: no, you can’t. You can't imagine the Christmas dinners because there aren't any. And the brothers will tell you why.

Told from Sherlock's and then from Mycroft's point of view. A little story on the reason behind their 'childish feud'.

Warnings: implied drug use.