Roxanne, not caring about the creamy mess she made of Jeff’s room, only wiped the Chronivac clean enough of cum to allow her to input changes. This time she knew what she wanted to do next.
With the commands entered into the machine, Roxanne smiled as the transformation of her brother took place. Her 5 incher grew in spurts, growing longer and fatter until it was a 16-inch erection with an equally large foreskin-covered mushroom head. She then felt her fat balls jostle in their sack as two more testicles joined their brethren, giving the tight ball sack a bag of marbles effect. That is if the individual marbles were each the size of softballs. Roxanne now had a very crowded groin area that was begging to be touched and groped.
“Oh goodness, can you feel it Jeff? Just letting you throb in the air feels so good.”
Indeed the pillar of flesh and its sperm-producing companion were sensitive, so much in fact, that just feeling the movement of air on skin made it jerk and drool precum in want.
Roxanne slowly held her fat branch of a cock with both hands only to audibly moan in delight at the moment of contact. It was like static on a playground slide in that the wave of electric pleasure hit her fast with a nice shocking feeling leaving her stunned in bliss. Her bliss was expressed in voice, a beautiful voice that would make any healthy man hard and embarrassed to hear because it was sexual over-exaggerated porn video like moaning. Yes, it was just that good.
Unknownst to Roxanne, a penis gets really sensitive after orgasm, which she just had two of. In combination with that fact, her newly enlarged cock and balls had more mass and thus more nerves and feeling receptors than her previous state; two things together, bada bing bada boom, super receptive sexual organs that feel more than possible for a regular human. She now had a hypersensitive fuck scepter with equally good feeling family jewels. Rant over, mic drop.
She didn’t know that upscaling her cock would be so euphoric. She couldn’t stop salivating or moaning as she just held her glorious shaft. With the initial shock endured, she sluggishly pulled down with glee in her eyes to steady free her fat mushroom dickhead from its prison of foreskin. Every millimeter of pink cockhead unbound, pounded joy and lightning into her body and mind. Just feeling the warm air on her skin was mind-blowing before, now it was mind-breaking. She knew if she hurried in her efforts of exposing Jeff’s dicktip, her mind would break. She would go stupid from the assault, so she pulled down nice and easy.
In no hurry, she worked, bit by bit she moved her arms down, absorbing the intense feeling gleefully. A stream of clear precum ran unending down her fuck rod adding to the lewdness of her action. She had to stop her hands every time she felt an uncontrollable twitch of delight run through her body or risk ruining her delicate work. It was slow-moving, but with stifled whimpers and outright moans of ecstasy, she got her foreskin down to the mushroom flare of her twitching cock.
“Okay, what the fuck is going on in there? Roxy! Jeff! You two better not be fucking each other or so help me mom and dad will disown both of you and I won’t feel a thing.”
The door to Jeff’s room slammed open revealing Roxanne and Jeff’s older sister Scarlett. This also allowed Scarlett a full view of Jeff’s cum covered room and Roxanne masturbating a monster cock that was attached to her.
“What the- Roxanne what the- the fuck- between- your holding- huge fat dick!”
Well, Roxanne’s mind broke. The unexpected arrival of her older sister made her jerk her arms up and down forcefully in fright. Coving and then exposing her super hyper-sensitive cockhead abruptly. Like a high-pressure water jet, cum flew from her four cum tanks and out of her long fat cannon blasting pulses of high-velocity sperm liquids onto her older sister Scarlett. Like that, Roxanne’s mind succumbed to succulent lustful pleasure mixed with utter embarrassment.
“Don’t look at me,” she choked out before the last visages of a sentient mind disappeared from her face. Only an indescribable look of corrupted joy remained as she hosed down her older sister with wave after wave of cum from her older brother.