After looking at her womanly inflatable body in the mirror, Mary grins and bounces over to the box of vials. She finds the vial she wants and takes out the male vial. With a shrug and giggle, she downs the whole thing. Walking back to the mirror, Mary waits to become an inflatable male.
It doesn't take long for the changes to ensue. Her breasts begin to shrink and flatten as her chest widens. Soon, she has big, meaty pects (or they would be meaty if they weren't inflated with air). Mary watches in fascination as her waist widens as well, making her once feminine hourglass shape more solidly masculine. Her body gains sharper and more rugged planes (for an inflatable body). Everything moves into a masculine shape, her face becomes ruggedly handsome and her whole body seems to ripple with muscles. Finally, Mary watches as her crotch begins to swell like a water balloon. A full, round rod swells down and out. Mary gasps as she gets a large and full penis with two round balls.
Marveling at the changes, Mary giggles at her new masculine body.