Then, she was released, and she caught her breath, the pussy's instructions seared into her mind, but, then she did what was the last thing on her mind, and she disregarded them.
Having worked with the vials for a little while, she had a better idea, and while the pussy would indeed have her do great things to herself, she had a better idea.
She could feel the pussy tug on her mind again, but she gently shushed it, and miraculously, it did, watching her.
Taking look at the vials box, Mary looked for a specific option, picking a new vial, Balls+.
She also took 2 Liquid+, and got to work.
First, she downed the new Balls+ vial. Her crotch flared in sensation, and she grunted.
While before there were no visible indication she had any testicles, now there seemed to be little bulge for the extra pair that grew right next to the old one, appearing to bob up and down under Mary's abdomen.
Mary refilled the vial, and took another chug. More testicles filled the space, and she watched as they all seemed to enter a rhythmic churning.
At that, she was reminded of how an engine would push its pistons down and up in a cycle, and got another idea.
Reaching back for the box, she picked another vial, Muscles+, and this time she needed to be tricky.
Pulling out all her memories of how her lower involuntary muscles had worked, she felt for them;
First, the one that controlled the flap to have fluids come from either her bladder or her testicles, she immediately opened this one towards her new testicles.
Then, another flap that would distribute the fluids between her pussy and her cock. (Apparently she could shoot cum from her other urethra? Food for thought.)
Then, finally, the muscles on her testicles themselves, she shuddered as she accidentally flexed them, and squeezed a little cum out of them, until she returned them to their rhythmic churning again.
She held the Muscles+ vial up to her cock tip, held it with the ring muscles inside that tip, and swallowed with her transformed cock, every last drop not having much chance to touch or coat her cock's insides, but instead all being pumped into her testicles.
First, she groaned in pain at this, but then she groaned in satisfaction, as she could feel the potion working, strengthening, reshaping...
Looking down onto her crotch, she could see 6 bumps in a V shape on her abdomen, pointing towards middle of her crotch, her cock.
She felt for them, and then let out a small gasp as she could feel them pulse, row-by-row, downwards, like a second heartbeat, slow yet only idle, like an engine ready to roar...
Before Mary felt herself get lost in her new pleasures, Gabe's pussy tickled the back of her mind, having silently approved of her plans, but intervening as she got distracted. Ah right, she was indeed forgetting one thing...
Mary reached for the two remaining Liquid vials, and held them to her cocktip again like before, swallowing them down all the way to her balls.
The effect was extremely noticeable, if before Mary would've thought that she had an engine that was ready to roar, now she had a machine, built to pump, ready to breed.
She felt her new additions, physically, feeling their tightness under her skin as they churned a minuscule amount of cum. She wagered that, the amount of cum which a normal guy would take a week of edging to build, she could casually churn out every minute or so, without edging, building and building in her reservoirs, tucked neatly into her crotch...
Mary put a finger onto one of them, and pressed. She felt nothing give, it was like steel, the muscle tone contributing to the rest of her abdomen, only now showing her filling capacity on full display...
She touched the testicles with her mind, and they began to pump, and churn, pump, and churn, she felt them settle into a rhythm, sloshing and squeezing fluids, stealing hydration from her body's reserves, to prepare her first "delivery", dedicating it to Gabe.
She laid a hand on her new engine for a moment, feeling her new breeding machine, feeling new muscles ripple and stretch under her fingers, and feeling a building sensation start to emerge from her crotch, one that got her cock to seal itself from her cum factory with a hidden ring muscle.
She felt a tickle in the back of her mind, Gabe's pussy, pushing a feeling; an inch of satisfaction, before hitting her with sheer need again.
Gabe came to, and lifts her head from the pillow to look towards Mary.
She sees Mary's cock twisting through the air, muscles quivering along the side of it, while a V-shaped set of 6 muscles seemed to be rippling on her abdomen, right above her cock. Gabe watched them churn, and as Mary looked over, Gabe looked her in the eyes. Mary saw a face of need, of want, no word needed to be said.
Her pussy is still drooling meanwhile, tongues continually licking fluids off of the lips, and Mary gets a distinct sense that it was "staring".