Welcome
It was only when he began sharing a flat with John Watson that Sherlock allowed Mycroft to step into his home. Of course it was only to tell him that, no, he wouldn't help him with the Bruce-Partingon Plans, but when irritation passed, Mycroft was not fooled. Something had changed for Sherlock. Something had calmed or mellowed, just slightly, that core he kept tightly locked away, that barrier he still held against his brother, even after all these years. In the nine years since his return from America, it was the first time he had let Mycroft in his house.