Sherlock sat on the bed next to Mycroft and stared at him for a half second, before closing the gap between their mouths, and brushing a delicate kiss onto his brother's lips. He pulled back almost immediately, a slight blush coloring his cheeks.
Sherlock moved to get up, muttering something about heading to bed, when Mycroft laid a hand on his arm to stop him. Sherlock pivoted quickly, surprised at his brother's touch.
Very softly Mycroft said, "You already are in bed."
Mycroft had always warned Sherlock that feelings can get in the way, especially when it comes to his chosen line of work. Typically, this would be the one thing the two brothers could agree on, however, when you reappear on his doorstep after years of no contact, informing Sherlock that your life's in danger, he's left struggling with both his feelings and what happened in your shared past. How can he possibly pretend such strong emotions have never existed when they still remain?