Yay, Company! (An obvious tip-off as to the authorship, if you are me, anyway.)
"Severus..." "Are you intending to finish a sentence this time?" Severus enquires. "Intending to, yes," Harry says ruefully. "Whether I will or not..." "Are riddles an integral part of your festive celebrations?"
lol. This is my favourite bit, next to "Company manners".