First Sherlock ficlet. Review if you want more.

"How dare you not tell your own family this!"

"Mummy." Mycroft started. "I didn't mea-."

"You have to think about the consequences of your actions!" She took on an adoring tone. "Sherlock would never do something like this." The old woman sighed in disappointment at her eldest. "I can't believe I thought you were the responsible one."

This is the comment that brings Mycraft's shoulders to droop. He doesn't bother to respond to his mother's rant. Clearly, what little parental approval he had worked so hard for was gone.

"How you could even think this was the right decision is beyond me!" She doesn't pause to collect herself. "And all this time you just lied! About your brother and your sister! You were the oldest you were supposed to watch out for them!"

"But she tried to kill Sherlock..." Mycraft stammers out meekly.

Dad buts in. "Even if she's done bad things she's still our daughter and deserves unconditional love."

Mycraft silently wonders why that doesn't apply to him.

His mother is no longer yelling but just as angry. "If we had placed Sherlock in charge this never would have happened. He's always been the most sensible. I mean he was always so much more even tempered and relaxed. You were always so uptight, I mean he was such a genius it was understandable he didn't get on with people but-

Before it can get to the point where it's just his Mum listing all his faults and shortcomings in front of his family and Dr. Watson he gets up and leaves the house.