Author's Note: This story was requested by my reader, Sovietspyder.
*****
It wasn't real. It wasn't real. It wasn't real... It was real. Mia couldn't take her eyes off her reflection, though the mirror didn't show her face anymore, gaze firmly planted on the heaving poles of rigid flesh that drooped from her crotch. Twin penises in every way, right down to the pink splotch on the right-side of them. They hadn't softened since she got home, as if annoying that she hadn't stayed to use them on Annie and Keira.
How would that have turned out anyway, she wondered and bit back a deep moan. Her cock – cocks, she mentally corrected herself – jerked and slapped against her underbelly, forcing her lips apart to let her moan aloud. If she fucked using both of them, the sensations would be doubled.
"Oh god," she groaned, picturing Annie and Keira being impaled on the dual shafts. Keira could be on top of Annie, the two making out while their bellies were distended by Mia's sheer size. Their flesh would rub together as well.
A burst of delight shot through the centaur's body as her cocks leapt and exploded with a deluge of pre-cum. It splattered against her wooden floor, each glob was half a centimetre thick and a murky, white colour. More dribbled profusely from her tips, streaking down the lengths or pooling between her hooves. Her eyes refused to stray from the sight.
She almost swore her body was growing before her eyes. Her ball sack never looked so big before, like it had spontaneously doubled in size since growing her second cock. Which made sense, she thought before turning her attention back to the hulking members. If everything had doubled, then what would her orgasm be like. Her breaths deepened at the possibility, recalling just how prolific she already was. What she wouldn't give to just get a glimpse of her capability.
The only problem that stood in her way was a keen lack of reach. No matter how she tried to angle her two halves, she couldn't reach her giant, three-foot shafts. All she could do was stare at them, whether through the mirror or as she laid down. The flared heads were both about as wide as a volley ball with blunt tips, which housed her urethral openings and released her never-ending pre-cum. Even with her constant growth, Mia doubted she could fit her hands around a single shaft, let along both.
They were almost the same length as Annie was. She giggled at the thought, imagining what that might look like if she kept growing. Annie could lay next to her erection, with her whole body wrapped around it and still have more to spare, or if she tried to take it up her cunt again. Mia shook her hindquarters in longing, swaying her dual members side to side and flinging more of her murky pre across her home.
She, fortunately, didn't own much furniture. A couch for guests, an old grandfather clock that was there before she was moved in, and a large tv that had a sheet of plastic over the screen. After her recent growth and the incidents it incurred, she didn't want to take chances. The last thing she wanted was to watch Hell's Kitchen while Gordon Ramsay had cum-stache. Although that would be hilarious, she thought.
Random ropes of her pre-cum splattered across the mirror and the wallpaper around it. Her doctors had recommended that she be able to study herself at nearly all times, in case anything felt wrong and being a centaur made that tricky at best. Mia paused her fantasy and facepalmed. She'd completely forgotten to try calling again.
After she'd ducked back inside, her attention was engulfed by her reflection. She forced her eyes away, and her mind to focus on finding her phone rather than the pleasant sensation of slick pre-cum pouring from her dicks. The flow refused to stop or even slow despite her efforts, leaving an unmissable trail whether she went.
"There you are!" Mia announced and snatched her phone from the kitchen counter, then turned to trot back into the living room. She forgot to duck, however, and smacked her head on the doorframe. The entire farmhouse had been upgraded to handle her unique situation. Every room provided enough space for her to turn freely, while the ceilings stood high enough that, even now, she could only touch them with the tip of her fingers. Though that likely wouldn't last long.
"Come on, come on," Mia mumbled as the phone rang. This information couldn't wait until Friday, or even tomorrow for that matter, "Pick up damn it." She snapped in frustration. As expected, it beeped and asked for a message. Mia pinched the bridge of her nose and sighed, tossing her phone onto the couch. She glanced at the time; 12:43AM.
Had she really been staring at herself for that long? Mia groaned and rubbed at her eyes, finally feeling the time, though she doubted sleep would come easily with her shafts as they were, not to mention how soaked her bed would get. It wasn't necessarily a bed, more just a large mattress for her to lay on. She had a thick blanket for Winter.
"Bathtub it is then," Mia muttered, at least there she wouldn't have to worry about flooding the place. She settled into the tub, though it was more of a lavish shower stall with nozzles at almost every angle poised to clean her properly. Her cocks rubbed against the ground, eliciting a soft groan of pleasure. Pre-cum almost immediately pooled under her, spreading out to encompass the area before being swallowed by the drain. She'd need a nice, long shower to wash it out.
The last thing she needed was to walk onto campus reeking of sex. Albeit the idea made her shafts throb all the harder, especially given how Keira and Annie reacted just to her natural odour earlier. Who knew what would happen to everyone else? Mia ground her dual-mounted groin against the increasingly slick floor, moaning gently as her fantasies took hold.
She had Annie riding one cock, while Keira and Rhona pleasured the second. They took turns deepthroating it, stretching their bodies beyond human possibility time and again. Other people would take notice, coming over to see the spectacle. Then, one by one, they'd join in in anyway that they could. Kissing Mia, sucking on her tits, masturbating in front of her, or bathing her balls in their spit. And for the grand finale, she'd systematically fuck two of them at a time, inflating their bodies with cum.
"Fuck!" Mia cried and grabbed at her breasts. So caught in her imagination, she hadn't noticed her grinding hips moving faster or the rising pleasure. Her cocks exploded with cum, overwhelming the drain to flow across her bathroom tiles and into the living room. She didn't care about that, though. Every facet of her being was turned toward the mind altering tremors racing across her body. Her hips continued to buck with each shock of delight that sparked from her balls, through her shafts, up her spines and straight to her brain.
The flood persisted on and on. She pulled on her nipples, the comparatively tame sensation enough to trigger another explosion that set her balls rumbling. Each burst across her underbelly made her all the more aware of her body, as if the spurts were making her grow even bigger. Her balls practically felt like there were more than just two as she ground against her floor. Cum filled the stall, pouring over the inch high barrier faster with every second.
Mia turned onto her side and let her cocks unleash their torrents into the air. Without her body in the way, her jets of seed rocketed against the shower wall, splashing back onto her face and body. It already looked thicker than her earlier release. She continued to grope her breasts and tug on her nipples, moaning the entire time.
