Author's Note

Horned antrho characters, as will be implied throughout. Also going the route of colored skin rather than a layer of fur. Everyone handles these a bit differently. Enjoy!

1) Sweetie Belle Fills Out

The mares in Sweetie Belle’s family were all well known for their exquisite figures. All the mares, that was, except for Sweetie Belle. Ever since she was old enough to understand such things, she had been waiting for her curvaceous inheritance, as desperately as she had awaited her cutie mark. But at 22, Sweetie was beginning to find the phrase “late bloomer” increasingly unrealistic.

Her sister, Rarity, was the epitome of Belle family beauty: reasonably tall at 5’ 9”, with long legs and wide hips. Rarity’s considerable buttocks brought her hip measurement to a bountiful 40”, which was offset beautifully by her G-cup breasts up top. Sweetie may have grown into her height, even beating her statuesque sister by an inch, but her b-cup breasts and small, athletic-looking rear left much to be desired. And desire she did.

Some mares might have been satisfied to be thin and conventionally beautiful, but Rarity had always instilled in Sweetie Belle a distaste for what the older sister saw as unrealistic standards of thin, willowy beauty. Rarity had surely meant to build up Sweetie’s confidence in the face of her future shapeliness, but when that shapeliness had never come, the lesson had produced the opposite effect. Being the sister of a fashion designer, Sweetie managed as well as she could. Even now, in the privacy of her own room, she wore a flattering ensemble. A tight pink undershirt matched her mane and adhered closely to what curves she had to offer. Atop this she wore a navy blazer, fitted short so that its two buttons barely fasten beneath her breasts, framing and lifting them nicely. Paired with the low cut of the undershirt, Sweetie even managed a hint of cleavage. To take advantage of her slim midriff, Sweetie wore a black, high-waisted mini-skirt, maximizing the disparity between her thin waist and unimpressive hips.

Looking down at these textile illusions, Sweetie mused to herself: hopefully I won’t need these sorts of tricks much longer. The idea sent a flush of excitement through Sweetie, putting a dash of red in her white cheeks.

Earlier, under the pretense of basic scholarship, Sweetie had paid a visit to Twilight’s extensive library. There she had found a spell that promised to unlock a mare’s full potential for beauty. If the author of this spell and Sweetie had similar ideas of beauty, then this magic could surely find the genetic potential dammed up in Sweetie, and release the floodgates.

Sweetie felt her heart beat quicken and her palms grow clammy with her anticipation. She seated herself firmly in a soft, armless chair and clasped her hands tightly in her lap, clinging to the hem of her skirt for steadiness. She activated her horn, casting a faint green glow into her dimly sun-lit room. The spell shot through her body with an electric warmth, almost sensual in its insistent heat. Her heart raced, the frantic beating increasing Sweetie’s nervousness for what might happen next. Unconsciously, she began to pant as if from exertion, and indeed, the automatic tightening of muscles all over her body was beginning to task her. A sensation of dampness spread across Sweetie’s skin as the fear, excitement, and internal heat started a light sweat over her entire body.

Then she felt it. Sweetie released the hem of her skirt and shot her gaze quickly downward as an unfamiliar tightness spread through her chest. Her hands trembled just a few inches from her breasts as she stared down, transfixed, while the sensation of her bra pulling steadily tighter into her flesh continued. Without thinking, she let out a soft moan between harsh breaths. Just as Sweetie was able to discern her nub of cleavage growing slowly into a proper line, her spine convulsed in a spasm that sent her head back and her hands grasping desperately at the seat of the chair. Her breathing became heavier, and with each gulp of air her breasts were thrust forward, eliciting a squeaking coo from Sweetie and an audible strain from her clothing.

Breath

“Ooh!”

Stretch

Presently, soft flesh began to protrude from the neck line of her undershirt, forced upward by the continuing restraint of her now insufficient bra. Sweetie let out a lascivious groan as her now c-cup breasts pulsed ever larger. Sweat was beginning to glisten on her new cleavage, accentuating the growing roundness of each breast. Without warning, the warmth and tension throughout Sweetie’s body seemed to surge toward her chest. Her growth moved with visible speed, pressing a full 2 inches of tight cleavage over the neck of her shirt and causing her jacket buttons to whine in protest. Sweetie reveled in the growing pressure of her chest and all that it meant. She thrust her shoulders back in abandon and felt a sexual rush of pleasure as the buttons of her jacket burst with a twang-twang, setting her new d-cup breasts quivering with the sudden release.

Only then did Sweetie notice a faint tendril of electric sensation sliding down her spine and igniting just below her tail. Her hips began to creak faintly as they pressed minutely but steadily outward against the restraining fabric of her skirt. The cheeks of her ass began to swell and fatten, perceptible as an inward shifting of her panties. At this new development, Sweetie placed her back firmly into the chair and released her grip on the seat, moving her hands upward to explore her body. Her left hand came to rest on her lap, feeling the hem of her skirt creeping up her thigh, while the right hand continued up to her tightly constrained breasts, gently cupping one.

Sweetie was panting laboriously now, her mouth held open in a small ‘o’. The sensation of her fingers pressing gently into her swelling breast was like a switch, instantly filling every fiber of her being with exhilarating fire. Her every muscle contracted, from her clasping fingers to her curling toes. This pulled her body slightly forward, and she felt the weight of her breasts as an unfamiliar pull on her torso. Luxurious tit-flesh poured into her hand as her bust surged another cup size. Her shirt grew transparent with its absurd tautness over her expanding mammaries. Meanwhile the hem of her skirt slid entirely out from under her other hand. Her hips tore twin white crescents along the side seams of the garment, exposing the increasingly pliable flesh underneath. The zipper along the back of the skirt began to lose its integrity under the pressure of her ballooning posterior. The zipper’s teeth burst apart in fits of popping, in time with Sweetie’s own staccato of pleasured mews.

Sweetie reached both hands back to release the clasp that secured the skirt above her tail, leaving it free to slide off toward her feet. She tossed the destroyed garment across the room with a flip of her toes. Even with the skirt gone, the uncomfortable compression at her pelvis remained as her panties stretched ever closer to their limit. The striped pink and white fabric was plastered tightly into her labia, and rendered nearly transparent by the moisture of her arousal. Around the back, the fabric had been compressed entirely between her burgeoning buttocks, leaving only a thin line of crumpled fabric between pulsating globes of flesh. And everywhere the elastic was fraying and whining as it pulled sharply into the outgoing softness.

As Sweetie continued to writhe under the ever mounting pleasure, she flung one hand behind her head and the other to her jaw, draping a finger on the corner of her hot, gasping mouth. A lock of curly pink and purple hair fell to her heaving breasts. The hair’s ends mixed with the fine sheen of sweat and contoured the taught, milky skin. The curl began to jostle in time with the small pumping motion of her breasts, caused both by their growth and her enraptured trembling.

Her white skin and the elongated remains of her pale blue bra showed clearly through her overtaxed pink shirt. The neckline had torn and slid to the center of her now e cup breasts, with mounds of cleavage 3 inches high muffin-topping over the restraint. As her chest pushed relentlessly outward the fabric protested loudly before gapping tears snapped into existence at either side of her thrusting breasts, as well as in the deepening valley between them. In annoyance Sweetie tugged sharply at the pink fabric and ripped it in two at the neckline, allowing it to fall away in tatters to rest only on her abdomen. Tremendous masses of supple white flesh now quivered in full view, distorted alarmingly at the center by the clinging band of Sweetie’s blue bra. The pathetically undersized cups were pressed flat into Sweeties nipples and held together now by the segmented and frayed remnants of the band and center clasp. Faint hints of large, pink areola peaked over the dilapidated cups.

The fantastic sensation of the spell retreated into Sweetie’s core. She took this moment to collect herself, clasping her hands in her lap and sitting back securely in the chair. Her heart continued to pound with uncertainty and elation as the smoldering sensation simmered in her torso. Looking down at her new physique, Sweetie relished a feeling of sexual power. But even more than that, the raw sense of wildness enraptured her. Her lack of control over the sensations, her body, everything! It brought a fresh flush to her face just contemplating the seething magic still within her, and what it might yet do…at any moment.

Whatever remaining damn of potential the spell had been seeking within Sweetie was loosed all at once. This time the sensation was truly like a torrent, thrusting her legs apart and her arms downward to her sides with the mental weight of it. She came hard. Her hips and ass jutted out several inches in an instant. With a resounding snap her panties split at both sides and flung downward to leave her expansive ass and dripping pussy completely nude. Sweetie screamed in ecstasy as her breasts surged in every direction, snapping her puny bra and oscillating madly in the newfound freedom. Grapefruit sized globs of wet tit sloshed back and forth as they sloped gently toward the end of her rib-cage. Sweetie’s orgasm rolled on and on as every nerve ending seemed to ring with the same over powering release normally relegated to her genitals. Her skin seemed to crawl in time with the orgasmic pulsing of her vaginal walls, rolling her consciousness along a relentless wave of euphoria.

After a full minute, which felt like hours, Sweetie’s climax subsided. She sat with her eyes closed and all her limbs hanging limp. The pleasant tingling of relaxation after long exertion filled her musculature and left her almost drowsy with contentment. Her heartbeat slowed and her breathing stabilized as the sweat on her body dried and cooled in the temperate air of her room. Coming back to herself, Sweetie sat up with a jolt that sent her new assets jostling. Sweetie brought her hands to her collar bone and gently ran them down the new expanded skin of her chest, feeling the gentle outward curve of her breasts. She paused at the nipples, noting the areolas which had swollen to 2 inch disks that mounded out softly from the level of her breasts, ending in pert nipples still erect from the excitement of her growth.

As Sweetie’s hands passed under the pendulous lower curve of her weighty bosom, she slid them to the sides of her abdomen and began tracking downward toward her enhanced hips. She felt for the first time in her life an undeniable, and in fact quite severe, outward curve as her hands passed from thin waist to thick pelvis, fingers sinking into pillowy softness at the lightest squeeze. Suddenly Sweetie pulled her hands away from her luxurious new curves as she remembered her preparations. She stood up quickly and bolted to her dresser, inhibited only slightly by the unfamiliar jiggling of her body. Reaching far back into the top drawer, Sweetie produced a lavender lingerie set she had stolen from Rarity even before she had stumbled upon this spell. She stepped into the panties and pulled them up swiftly, but still needed to tug the rear into alignment over the new impediment of her protruding ass. The bra, too, took unusual adjustments to center her nipples properly in the cups.

The fit was perfect! Which was somewhat of a shame. Sweetie had dared to hope that the extra inch of height she had on Rarity might translate to other advantages. But Sweetie had too much to be elated about to let disappointment cloud her mood.

Freshly costumed, Sweetie bounced over to her full length mirror, a description befitting both her jubilant step and the motion of her expanded flesh. Sweetie gazed gleefully into the reflection, admiring the fit of her sister’s G cup bra on her augmented assets. Two tremendous globes of velvety flesh jutted surreally from Sweetie’s otherwise thin frame, all artfully contained by two great lavender bowls, ornately covered and fringed with delicate patterns of lace. The sheer straps and bands of the bra gave off the tantalizing illusion that the colossal spheres atop Sweetie’s chest were suspended by their own perkiness. Playfully, Sweetie grabbed at the two shoulder straps and began to alternate pulling one and then the other. Pounds of pliable tit-flesh sloshed up and down in each of the cups, milky white ripples giving way to smooth, rounded curves and back again with every cycle. Grinning widely Sweetie dropped her body forward to admire her cleavage from above, breasts hanging down more than half a foot, pendulous but still shapely. Caught up in a fit of elated giggling, Sweetie rocked her body side to side, watching the slow sympathetic response of her dangling tits. Expansive pink nipples made flittering appearances as her breasts shifted and jostled in the free hanging bra.

Righting herself with an unnecessary hop and an excited squee, Sweetie brought her attention to her pilfered panties. A matching set of lacework obscured her genitals and posterior, connected over her hips by more bands of sheer fabric. Sweetie’s plump hips now protruded noticeably beyond her shoulder width, causing her arms to lean slightly outward when left at her sides. Turning her profile to the mirror now, Sweetie finally got a good look at her massively expanded ass. Her mouth gapped with the shock as she studied the expansive globes now looming above her thighs. The cheeks sloped out sharply from beneath her tail, and they just kept rising and rising until they peaked at what must have been 6 whole inches from the plane of her back! Turning quickly and swishing her tail to the side, Sweetie got a more complete view and gasped with the revelation. Each of her gargantuan cheeks seemed as big as a ponies head, and they only protruded slightly further upon Sweetie giddily tightening her gluteus muscles. Loosening the tensed muscles, Sweetie reached her hands below each of the massive cheeks and began to bounce them up and down in exploration. The smooth globes protruding from beneath the panty fabric gave way to pocked ripples of cellulitic flesh as both weighty masses rose and fell in perfect sync with Sweetie’s awed exhalations. On a lecherous whim, Sweetie grabbed the band of the panties and yanked them down to rest near the middle of her hips, exposing a 5 inch swath of ass cleavage. Then she brought her right hand down hard into a cheek, elating in the stinging sensation, the satisfying clap, and the rapid undulating of her fattened ass.

Turning back around in a fresh fit of giggles, Sweetie hugged her chest like a precious keepsake and began to ponder how her life would be transformed as her body had been. Sweetie had only experienced one sexual encounter in all her life, but now she was sure any stallion or mare on the market would be at her beck and call. Finally she could share in her sister’s prodigious success at sexual conquest, and perhaps also, romance. Sweetie flushed and pressed her hands hard against her mouth as she stifled an all-out shriek of excitement. But suddenly, she paused, and became very still. Something felt…odd, but she couldn’t quite place the source. Passing her awareness over her body, she found something. There, by her heart, a tiny glimmer, a warmth. It was…it was the sensation, the spell!

The recognition quickened her pulse in an instant. Why was there still some of that magic inside of her? It had clearly done its work. No sooner had this question crossed Sweetie’s mind than the quickening of her heart set of the clamming of her skin, then the laboring of her breathing, the quivering of her entire body. The familiar heat burst forth from her heart, filling her to every extremity like a crashing wave, but this time it was different. This time it was so much…more. Sweetie reeled and stumbled backward, colliding finally with a desk where her hands could land firmly to support her. She placed her ample behind on the lip of the desk and shifted much of her weight onto her trembling arms as she grunted loudly with the shock and sensation of what was happening to her.

Her breasts felt painfully tight as they thrust outward in great, sloshing pulsations. An audible groan emanated from the jiggling tissue as it struggled to keep up with the spell’s directive. Soft folds of flesh began to overhang the top of the cups, to press outward toward Sweetie’s arms, to poke desperately out of the bottom of the now insufficient bra. Simultaneously, Sweetie could feel the panties, still riding low on her hips, digging deeper and deeper into the expanding contours of her hips and ass. Bit by bit the warm flesh of Sweetie’s glutes spread across the cool surface of the desk as her ass pressed outward with an unstoppable urgency.

Desperate to save her sister’s creations from destruction Sweetie grabbed clumsily at her bosom as it moved outward with visible speed, managing to rip the bra down to rest underneath her forcefully swelling tits. Great firm globes of slightly undulating tissue relaxed their way down Sweetie’s torso as they grew heavier and heavier. Sweetie gave a resounding shriek as her breasts, hips, and ass gave a final tremendous surge. Her breasts flopped with a wet smack at nearly the level of her belly button, mounding outward from her chest in huge elongated spheres, each the size of Sweetie’s head. Her ass cheeks mounded outward in four great lobes, each cheek segmented near the center by the overly tight band of the lavender panties. Pushing off from the desk Sweetie thrust her hands into the constricting band and managed to wrest it to just below the start of her now massive cheeks. She hoped she’d managed to save both garments, lest her sister discover the unsolicited “borrowing”.

The magic finally left Sweetie now, crackling out of her skin with a green luminescence. She looked down at its final results and realized that saving Rarity’s lingerie had been a moot point. Sweetie was going to have some tough explaining to do regardless. Her massive tits absolutely dwarfed her thin torso. Placing both hands on her expansive, puffy nipples, Sweetie hefted her gargantuan mammaries. Keeping both hands stretched completely flat, Sweetie still could not encompass the full breadth of each sprawling tit, with pliable folds of the near limitless flesh pressing past the tips of her fingers, around the sides of her wrists, and through the gaps in her splayed digits. Out of curiosity, Sweetie lifted her weighty bosom to the height of her collar bones and let them fall freely. They landed hard against her rib cage with another moist sounding slap and enough violent jiggling to send Sweetie’s whole frame rocking back and forth just to keep balanced.

Sweetie reached back to grab two exploratory fistfuls of supple ass flesh, feeling each finger sink easily into folds of the ample tissue. Opening her hands, Sweetie ran her palms up and down both extensive cheeks, realizing each was at least one and a half times the mass of one of her breasts. A gentle shaking of her hips sent the excessive meat jostling sensuously under Sweetie’s probing hands. Pondering her positively lecherous new body, Sweetie flushed with excitement as she imagined an amorous stallion wildly groping at her expansive ass while thrusting into her. Reaching up and pressing her immense tits together, she imagined fully enveloping a docile mare’s head in a cage of lewd softness.

Unable to stand the growing heat and sopping moisture of her sex Sweetie rushed to her bed and threw herself onto it with a creaking of springs and a sloshing of her own body. She thrust a hand into her expectant lips, while the other began kneading a bountiful tit with reckless sexual energy. As the electric thrill emanating from Sweetie’s clit mounted and mounted, she was overcome with every one of her previously hopeless fantasies that her body now promised to fulfill. The wet heat of tongues, the tender touch of malleable curves, the hard and musky thrust of a stallionhood. She was so voluptuous now, so rawly sexual, so irresistible, beyond what she had dared to imagine! The pleasure she was feeling now was just the beginning.

She quivered with the anticipation, and came.