"I'm pretty sure you're the one who followed me around in school," Draco drawled, stepping out onto the balcony. "And if you noticed anything but that bottle of yours you'd see I have a potion out here. It needs moonlight."
He walked to the corner of the room where a very small cauldron was quietly simmering away.
"And I have not been hiding. I've been brewing. Hangover cures, pain potions, dreamless sleep. All things I'm sure you're going to want sooner or later."
He gave his cauldron a counterclockwise stir, then leaned against the wall.
"But don't let me interrupt. I can see you were gearing up got a good brood."