The sticker formed over onto her face, her cumfilled mouth suddenly shifting internally. Olivia's tongue disappeared, followed by her teeth as the slit formed vertically. To make space for her new uterus, cavities opened up in her breasts, the ovaries resting near her shoulders.
The shift was almost immediate. One moment Olivia had beautiful kissable lips, and the next, a delicious pussy, complete with clitoris resting where the tip of her nose should be. Olivia's nostrils flared on either side of her new face-clit as the new sensations took hold. New nerve endings formed in her face and even breathing caused minor orgasmic tremors to shoot through her body.
In a lightheaded state she stumbled forward, tripping and falling into Sophia's tits, the wetness from her pussy smearing across them with a subtle sheen. She barely had time to register she had even fallen, when Sophia redirected her face lower. A last moment of realization crossed her eyes as Sophia slammed Olivia's face over her massive pussy-headed cock. For Sophia, the sensation was immeasurable. The clit atop her dick rubbed against Olivia's new throat all the way to the max, and the tight walls of her new pussy caressed the shaft as well. Despite having just came, this new feeling caused Sophia's body to shudder once more and deposit another several ounces of cum deep into Olivia's new vagina.
For Olivia, it was an acute mix of horror and pleasure, neither one of which she could focus on at any given moment. Her face felt funny, and she barely had time to register anything had happened before a penis attached to her best friend was forcing its way down her throat. Her eyes right up against Sophia's pelvis before being pulled away and slammed back down; each time causing immense pleasure where she had never felt it before. Her throat felt odd as well. Without a gag reflex, Sophia's new appendage was free to hit every nerve ending all the way to the base of Olivia's throat. And it felt amazing. For a brief moment she was snap back to reality as her field of view was filled with the Sophia's crotch, and then the pleasure would override whatever inhibitions she had, over and over, until suddenly Sophia's cock stiffened, lengthening slightly as a massive pool of cum shot into her, causing Olivia to cum at the same time.
Sophia slumped back, reveling in the aftermath of what had transpired. Olivia as well fell back onto her ass, propped up by a hand. The other slowly approaching her face. Folds of her new sex flitted across her fingers. One finger resting inside briefly before she pulled her hand away, terrified of what had happened to her. As she did so however, the pile of stickers, whatever they were, caught her attention.
Sophia's eyes were still closed from the euphoria. Olivia took this time to act, grabbing the first one on the pile.