Mary looked at her friend, a fully inflated balloon girl, quite lovely as a balloon too. "Well, you didn't pick an animal vial, so I get to pick one for you!" A look of shock came over comically on Jess's rubberized face. Mary laughed and flicked a hand at Jess, making him look gay.
He turned to the box of vials and perused it for a few minutes. Mary plucked out one vial and hid it in his meaty hand while he continued to look for the second one. Jess began to grow impatient.
"Hurry it up, Mary," Jess squeaked. Her voice was higher and was closer to sounding like balloon letting out it's air.
Mary glanced at her and smiled. "Don't worry yourself, my balloon Jess, this'll be worth it." He turned back to the box and quickly pulled out the other vial and put it in his other hand. "OK, now we're ready." Mary took one vial, unstoppered it and brought it over to Jess. The label was still hidden. "Open up, you don't get to see what this is." Mary's eyes gleamed with delight.
Jess looked up at her friend, a gorgeous hunk of a man now. She didn't know what the vial would turn her into. What would Mary want to turn her into? At this point, she wouldn't even venture a guess. She did trust her friend, right? Well, Jess had come this far, so why not? Jess opened her mouth and let Mary pour the vial in. The liquid slid down her throat and dripped down to butt. There was nothing to stop it as she was filled with nothing but air.
Mary smiled and drank her own vial. "This should be good," he said and the two friends waited for their changes.