It dawned on Jillian that whatever was in those cookies had affected the Potions Master as well.

"I--I think Professor Melita needs some of that...er, delicious beverage you served Professor Masterson over there a while ago, Nurse Numel." Jillian said, trying to manipulate the situation. Maybe to get the Potions Master to her right senses as fast as possible and agree to drinking whatever the Nurse gave Constantine.