"He is so insufferable that it is necessary," Sherlock scowled. "But I do not think that it is hilarious, John." He tilted his head. How could John find they exchange between Mycroft and him entertaining? How could anything to do with Mycroft be entertaining.
"It gets quite annoying for those around them," Greg added with a slight face to go along with his words before smiling at Mycroft, squeezing his hand slightly. "Of course we do. This is going to be worse next year when you are actually the head boy, won't it? All the bossiness." He didn't seem at all upset about it, though, still smiling. "Bye, John. And yes, hopefully I will see you again." He smiled. If John became something like a friend to Sherlock then that was a definite.
At John's confused look in his direction Sherlock just made a slight gagging motion. It wouldn't answer John's confusion but it was basically his reaction to Greg and Mycroft's whole relationship. Then again he wasn't really one who had any understanding of something... romantic. It was all too sappy for him and disgusting and at the moment at the age of eleven he had no wish to even think about it. The possibility of being friends with someone was bad enough.