When Mycroft left Sherlock went back to his normal chatter to Isabelle, almost always answering his own questions. Around midnight John had left to go back to Mary, so it was just him and Bella left. Sherlock looked up from the file Mycroft had given him, and over to Isabelle who looked like she was taking a break from reading. "I'm sorry that my brother questioned you when he first got here, about what our friendship was... He's a jackass."
(OOC: Sorry that was so short, I didn't really know what to do, and I thought that maybe you'd want Sherlock to show an actual human emotion? xD... Also I'm busy so I had to get up multiple times so I lost all my ides.)