Massive Mare - Giantess Horse Futa TF

Follow the instructions on height potions... lest there be consequences.

Emma hated being short. Even for a girl, at a measly 4’9” she was significantly below average.

She felt self-conscious and thought others made fun of her for her height. Emma had considered everything – from insisting to wear high heels everywhere, to limb lengthening surgery – until she stumbled upon a curious webpage.

Something that should’ve belonged on the dark web. And yet, here it was.

The site claimed it had all sorts of potions available – a recent review stated a sex change potion had changed the user’s life for good.

There was another potion that caught Emma’s eye – a growth potion. She wanted to try it.

The website provided very little information – other than not to take too much of the potion at once, for unexpected side effects could occur. Money back guaranteed.

That was enough to convince Emma to make the purchase.

The bottle arrived ridiculously quickly – in a few hours,, her doorbell rang. When she answered, Emma saw that a package had been left.

Inside was the potion Emma had been longing for.

It was accompanied by a note, warning Emma that its effects were permanent, and once again pressing the fact that too much could trigger “unknown side effects”.

Emma shrugged, deciding to start with a single sip.

She could immediately feel the effects; her spine began to tingle and her shins began to hurt.

Her bones cracked as her posture changed; she grew one inch. Two.

And then she stopped. She’d barely grown enough to need a new pair of pants.

Her shoes no longer fit, but she still felt short – far too short. Growling with frustration, Emma crumpled up the paper with the warning and downed the entire bottle – side effects be damned. She’d rather become six feet tall than remain 5 feet forever.

She wiped her mouth, placing the now empty bottle on the counter with a satisfied smirk.

The counter had already become significantly lower.

And... lower.

Even lower.

The counter reached to just above her knees now – and Emma began to panic. Soon, her head touched the ceiling, and she was growing still – her shoulders pressed against the concrete uncomfortably as her jeans, stretched to their absolute limits, began to pop and tear at the seams.

Her breasts swelled, threatening to pop out of her tank top at the top. No longer able to contain them, the poor thing burst apart in to two scraps of fabric, the front resembling a bib more than a garment. But soon, nothing on Earth would be big enough to cover her chest, which would swell to the size of the globe statues found at the entrance of the Universal Studios theme parks.

Emma moaned as her body tried to resist the changes. She proceeded to bend forward as much as possible, but her body insisted; soon, she pushed through the ceiling, destroying her two-story home. Giving up, she decided to push to make her break through the roof easier.

Her hips and thighs had increased in volume along with their new size; she was now voluptuous and curvy, as well as thoroughly helplessly stuck. The hole for her head and shoulders was too small for the rest of her body to fit through, and there was no way she could exit in reverse without destroying even more of her house.

Side effects indeed. But... there was more.

Not wanting to destroy her house would prove futile, as Emma suddenly found herself wobbly on her feet – she fell backward, taking half of the house with her as she did.

She looked down, only to find that her feet had replaced themselves with... hooves.

Her toes had fused, and her toenails had grown to cover them, now thick and black instead of soft and pink. One pair of horse hooves.

And to make things worse, fur was travelling up her legs.

Nature was sure Emma was the only one of her species – requiring something special for her survival.

As she came into her new, equine form, her chest was allowed to remain the same – big, soft and pink.

It was her nether region that was up for a change.

Coming to her senses, she turned around on all fours and attempted to get up, allowing her tail free room to sprout. This would make standing up a little easier, she found – the more hair grew in, the steadier she became on her feet.

She fiddled with her new assets whilst the rest of her body covered in brown fur; as her jaw lengthened and her teeth grew in size, she began to whinny with pleasure. She could feel her tongue lengthen from the back of her throat – even her uvula was stretching to match her new physique. Imagine the pussy she could eat with this thing – if only it would fit.

And she wasn’t done… the whinny of arousal had come from somewhere. Somewhere… hormonal in nature.

Something was happening to her down below.

Her ears migrated, changing shape and getting hairy, now resting on top of her head, between her curly mane. She wiggled them a little to get to know them better.

Between her legs, the final change would occur. She still had her vagina and womb, and this would not change. But in addition to her female genitals, just in front of them, a small sack of skin began to grow. Slow at first, then faster as it covered in fur, until a massive ball sack swung between the half-stallion-half-mare’s thighs. A third bulge appeared from beneath the fur, which would grow out hairless – the newly grown penis came out hard, begging for relief. It was the size of a bus – and Emma would be hard-pressed to find a live hole to fit it inside other than her own.

It was more than big enough for Emma to use it on herself. Whether or not it would create viable offspring, was something she would have to try and find out. If she wanted her new species to thrive, she had better… unless she’d just so happen to stumble upon a stallion her size, but what were the odds? Her transformation had happened this way for a reason – likely a reason more important than simply pleasuring herself.

From a tiny, petite human girl who’d just wanted to add a few inches of height, she’d grown into a giant, house-destroying equine herm. All that had happened in the span of five minutes.

If she ever found a way to do it, she’d be sure to leave that website a scathing review – and warn the others of the side effects.