Business to get her boyfriend a playdate? Seemingly the end goal as far as he could tell which amused him just a little. He rubs a hand under his nose and over his lips before letting it flop down. He didn't send her here at all, did he. Wonder how impressed he'll be with her decision (sarcasm).

"Three it is." But he never did suggest that she was leaving him there, Tony. She was doing the opposite, trying to help, and like Sherlock (he can only assume) Tony will be annoyed but in the end grateful.