John laughed. "You guys are hilarious." He managed. "Do you argue often?"
Mycroft rolled his eyes. "One would say too much." He said, sighing heavily. He reached down and took Lestrade's hand. "Come on. We need to get back." He said quietly, although it was more of an order." John watched in shock. Wait, what?
He looked to Sherlock, completely confused, but he held his tongue, and just said. "Yeah, bye. I'm sure I'll see you two around." He said, smiling broadly again. Were Mycroft and Lestrade dating?! Or did people in the wizarding world just... hold hands like that? Or did Mycroft like Lestrade? Or - now, this one seemed the most likely - did Mycroft know that Lestrade fancied him, and was abusing this knowledge t manipulate him? The thoughts circled around his head, and he watched them curiously - but he obviously wasn't like Sherlock, and couldn't read the two prefects worth anything.