Jess picks up and hands the Canary vial to Mary, her mouth twitching slightly. She quickly covers it up with a smile. A forced smile. "Here you go. If you try this one, I'll try one too. And I'll let you pick it for me."
"Sounds like a plan!" The vial of pale yellow liquid is passed to Mary, who takes it eagerly. Jess watches Mary uncork the vial and put it to her mouth. Mary takes a sip, wanting only to change a little, just enough to show Jess that these worked wonders. But suddenly, the vial is tipped all the way up, sending a deluge of the yellow liquid into Mary's mouth. Her cheeks puff out with it. Jess's hands quickly move to hold Mary's mouth and nose shut, and Mary finds herself swallowing in order to get another breath of air.
As soon as Mary swallows, Jess lets go. Mary exhales explosively. "Jess! Why'd you do that? I don't want to be a full canary!" The magic of the liquid is starting to be felt by Mary.
"Oh, that's easy. I'm the one who sent the box of vials to you. I wondered what you would do with them, and if you'd call me over." Jess grinned, in a rather unfriendly manner.
"Whaa...?" Mary's voice is now rising slightly in pitch, with a slight musical quality to it. "Why?"
"Why? Simple! Revenge!"
Then...