Expansion

The book had said to wait an hour for results. Or it might have said 15 minutes. It wasn't the best translation but not many ponies spoke zebra, much less enough for a decent translation. Their medicine books were quite a prize though, especially for earth ponies preferring more natural solutions than unicorn magic promised. Not that there was anything wrong with unicorns, oh no, but their magic just wasn't very Earth Pony you know? But medicines and brews made from herbs? Now that's natural. And aren't zebras just striped earth ponies anyway? Besides, having a unicorn perform the spell might be a little too awkward.

Two hours passed and Milky Way sighed. The familiar, gradual pressure of the soft orbs between her thighs came anyway. Zebra magic was all superstitious nonsense after all. She should have known better than to trust the thing to help at all with her uncomfortable swelling.

She cautiously stood up, her now sensitive mammaries swaying and bouncing off each other and her inner thighs. She winced. She hadn't meant to wait this long. Perhaps she had been a little too hopeful the potion would work. She took a few careful steps from her bedroom to the spare bedroom she used for her 'work'. Was one day off from these too much to ask for? Her legs moved at her practiced bowlegged gait as she tried each step to both avoid more than the slightest contact as well as keep and jiggling and swaying to the minimum. Still, It was almost too much. She couldn't believe how far she'd let them grow this time.

She had just made it to her milking station. The custom shower stall took up half the room. A shelf by the door held empty bottles by a tapped collection barrel for her hoof powered breast pump. She could almost feel the relief she so needed seeing the pump nozzle on its hook. Her teats quivered as she took a careful step in their direction, before seeming to spike in pain. It was too much, She needed relief now. She practically leaped into the wide stall and cried out in the pain of sensitive cream colored orbs bouncing violently against each other. She whimpered and her eyes grew moist as she paused until the swaying stopped.

She glanced back at her underside, gasping at the sight of her breasts, pulled more taut than she'd ever seen them. She could almost see the veins and pale skin beneath her fur. Drop after drop glistened and fell, marking a path all the way out the door. Her hooves tapped slightly as she tried to turn around to the bench by the shower drain.

She was just about to carefully lower her rump onto the bench when a dizziness ran through her body. It was fallowed by a shiver running down her spine and spreading around her underbelly before hitting her swollen breasts. What came next was a feeling of warm relief, but not kind she had hoped for. Missing was the feeling milk streaming from her teats. It was as if the much of the milk had merely vanished altogether. Her forelegs collapsed beneath her and she rested her face on the tiled shower floor. It worked! Certainly took long enough. Maybe the magic just wasn't used to mares of her size. She sighed with relief, closing her eyes and letting slip a smile.

She could still feel them swaying from her sudden movement. She shifted splayed hind-legs to a more comfortable, feeling the familiar feeling of the warm and soft mounds of flesh hanging, now loosely, between them... Hanging a little lower than usual.

She carefully pushed herself up onto all four hooves and turned around, squinting slightly, to look again at her underside. She gasped in surprise at the sight. Where normally her incredible melons hung just below her creamy flank, now she could see her nipples reaching almost halfway down her legs. The half filled out proportionally as well, their incredible girth comparable more to soft balloons. The slow dripping form earlier was still present, though fast enough to almost be a steady stream. Before she had time to cry out in shock another dizzying wave washed over her, this time though the shivering didn't seem to stop. She realized the feeling wasn't from the same shivering, but it was as if a tap had been turned on inside her. Her breasts were filling up! She could even see them slowly expanding, barely growing any more taut and instead stretching and expanding. Her nipples came through on their previous threats and what was before a trickle became a steady stream of viscous white milk.

She collapsed on the bench in shock legs splaying out beneath her. The weight of her expanding assets almost pulled her forward as they slapped against the cold tiles. She starred down at them fearfully, hooves pulled tight against her chest. Before her were two mountains of flesh, each the size of a medium sized watermelon and visibly growing between her upturned back hooves. Past the mountains was a river of white leading into the shower drain. She let out a soft cry.

Carefully she reached forward to touch them with her forehooves. They were real. Her already oversized twins now grown into monsters. The were growing more taut though. Their growth was slowing down a little but the flow of milk kept it's unreal pace. There was nothing else she could do, she couldn't stand the thought of them filling as they did before. She pressed her forehooves into the mass of flesh that was her right breast. They were almost lost in the pillowy mass just one. She expertly applied enough pressure to increase the release of its milk. A wave of pleasure washed over her,making her gasp and fall forward onto her massive pillows. She felt their alien touch against her as the added wait increased the flow of milk and pleasure. She moaned at the feeling of a different release further below.

Biting her lip she tried her best to ignore the pressure, moaning and whimpering through her teeth as she pressed down on both breasts at once. It wasn't long before she climaxed a second, and then a third time, crying out each time. Somehow though she'd beat the open tap of fluid inside her and managed to reduce their size some, though it wouldn't last. She couldn't keep up like this, it was too painful. She looked over to her hoof pump across the room. She needed release, but not like this. With an incredible effort she managed to roll off the bench and onto the shower floor. The tiles were covered in a half inch of milk fighting to make its way down the drain. Raising up she tried to make her way forward, crying softly at the massive bags of flesh dragging behind her. Her rear hooves could barely make purchase on the floor and she struggled not to tread on the flesh in hanging out in their path, though not successfully. Her right hoof came in forceful contact with the increasingly sensitive creamy flesh of her breast. She cried in both pain and pleasure, tears streaming her eyes through a fourth climax. Finally she was able to grab the dual nozzles in her teeth. She backed up, her hindlegs lifting off the floor and her plot resting on its warm fleshy bed, higher slightly than if she were standing on the tips of her hooves. Giving up any hope of returning to the bench, she pull the pump towards her. It took a lot of slipping around on the wet floor before she finally had each hose attached, with her right hoof idling pressing on the pump handle, trying to keep them tight on through suction despite the steady and natural flow of milk.

She cried softly, burying her head in the wall of cleavage before her. They were each now as high as her standing eye level, but she could feel the magical tap slowing gradually. All that was left was to empty what was there. She lay back into the puddle of milk around her and closed her eyes. Gradually she built up a steady rhythm with the pump lever. Soon she felt the incredible pleasure of the pumps drawing more and more milk easily from each swollen teat. Soon her idle left hoof slid slowly the soft cleavage to her begging and buried slit. Day turned to night through the room's high up window, as she lay in her puddle of white bliss.

When morning came she rose sore and sticky, reaching carefully to turn on the shower heard. Her breasts had returned to their original size, sore from their magical expansion. As the water cleaned her dried and sticky fur she swore to never complain about her daily sessions again.