"Yes, Lupin, will you be joining him?" Snape asked. "Sleeping draught in exchange for your assistance for the barbecue?"

That nasty little smile made its appearance again.

"Before, during, and after it? That is, preparation and cooking--minimal cooking, I assure you." He didn't want to kill anyone (by accident) after all. "Serving and washing up?"

All that help just for making a sleeping draught or two... But Lupin needed his assistance with this. He was prepared to consider making next month's Wolfsbane if Lupin looked to not agree but what else did the man have to do with his time?