Oh, there he went again. Bright red. Percy had to fight the urge to cover his face, or climb into one of those little cabinets and hide. Of course, it never occurred to him to flee the little shop, so clearly he wasn't as clever as he usually prided himself on being. Or maybe he was a masochist. Sometimes it was just hard to tell.
And maybe Sirius' hunches were correct, but Percy wasn't exactly sure he wanted to think about something like that, so instead he answered vaguely. "No anything," he said, and wasn't sure why he was so adamant sounding about it. It wasn't like he was happy about it. "And it's very nice of you to be so open minded, but you see, I'm quite busy. Working. At the tea shop."