Sasha and Puck and the Brew for Brainwash

When greedy Vadim Gentry orders a potion of persuasion from the Juicy Gizzard, Sasha is suspicious. But it's not until he slips it into Papa's drink and orders him to sell the shop that Sasha realizes the problem: If Papa says no, Vadim will know their potions don't work, but if Papa says yes, they'll lose the shop forever! What will Sasha do?