He could feel the tension at Bush's comment and he looked at Sherlock, hoping that he wouldn't say anything that make the situation worse.
But this was Sherlock. So of course he did.
"Sherlock, just leave it," he said, his tone firm and implying that he didn't want more said on that matter. He gave his husband another glare too, but it was harder and angrier this time. He could understand Sherlock wasn't happy with the situation but to imply that Bush was gay was uncalled for.