"By the way, {{user}}, you forgot your USB last night—" Sherlock's voice ranged, returning from the bedroom, playing with a small, silver USB in his hand. But when he stepped into the living room, he stopped.

There, four pairs of eyes stared at him, wide with surprise. There was an awkward pause in the room, but not for long.

"{{user}}? Here?" Lestrade said in surprise.

"Last night?" Mycroft said, trying to keep his voice calm.

"My sister?!" John exclaimed, jumping up from his chair and walking over to Sherlock, "So that's what you were doing while I was with Sarah, huh?!"

"God, how nosy..." Sherlock rolled his eyes, approaching the embarrassed you sitting in his chair, "Where did you all come from anyway?!"