The night's rest was anything but, with the bed's owner tossing and turning, and not surrendering to the Sandgriff's serenade. She felt there was something she was forgetting, but for the life of her she simply couldn't remember. She'd wrapped her sheets into a tizzy, tossing and turning to and fro. In time, sleep claimed her, though it was to not be for long. within two hours of finally drifting away, the griffoness in the bed was awoken by the splashing of water on her. Soaking wet and notably angry, the griffoness bolted up with a growl, her massive mammaries jiggling from her sudden movement. Staring furiously at the offender, her boiling irritation finally bubbled over.

"What the actual FUCK Grampa! The hell was that for?" Gilda screeched, staring at the geezer who dared wake her in such a way. His only response, however, was to enter and flip her bed, taking Gilda with it. Lifting the soggy bundle of hatred by the scruff of her neck, Grampa Gruff dragged his granddaughter to a calendar hanging on her wall, pointing at a date that had been circled and arrowed to multiple times in bold red marker.

"Did you forget what today is, you stupid slut? It's Breeding Day!" And as soon as the words left his scarred face, Gilda's blood ran cold. Breeding Day?! How the hell did she - nay, could she - forget Breeding Day of all things? One of the biggest days of the year in Griffonstone. Always denoted by a certain smell in the air, and no one can forget it for a long while after - if nothing else than because cleanup can take a few weeks of work from all the messes. For you see, every year on Breeding Day, all of the griffonesses of Griffonstone were more or less free game for all the males that go into a rut on that day every year. A way to curb population losses, it became far too popular to simply end, even long after it was needed. Every griffoness is forced outside in little to no clothing, and they had to be smart to avoid being caught and bred. Some resorted to cheeky tricks, but all tried their best - usually - to avoid being caught. The smartest ones already had their spots selected to hide out the day. For Gilda, it was far too late for that, though.

"I'm not one for incest, but you'd better get moving before someone claims you here. I'll give you twenty minutes to get ready, but not a second more. Your time starts now. Move!" With a shove from her grandfather, the extremely busty griffoness sped off to the shower to warm from the ice water her grandfather dumped on her to wake her. The water heating, she stripped off the nighttime lingerie she had worn, before getting a look at herself in the mirror before it decided to fog. Once again, she found herself looking at her titanic tits. Staring at them, and her very voluptuous hips and ass, her mind began to wander to how she came to have such huge sizes...

"Jeez ya dweeb, decided to grow a bit there?" A certain prismatic pegasus froze in midair, before looking over to the griffon who just caught their attention. Spinning around in midair to face the predator, a few assets of the pony vowed to keep her spin going - conspiring with inertia to keep her breasts and ass turning, almost twisting Rainbow Dash out of the sky. However, showing the grace of someone who was familiar with her assets at this point, she swiftly stabilized, staring at the catbird that lounged on a cloud near her. Gilda was notably smaller then, more compact at that time than she was now, though that was soon to change. Catching up with her old flying buddy from Junior Speedsters, having decided to be friends again after Gilda saved Rainbow and one of her pony friends from a chasm, the griffoness chose to visit her in her home town. Things had progressed from there, before the pony introduced her to her friends and the pink one insisted on partying into the night. Surprisingly, there were a couple other griffons at that party, and none of them would forget it. Someone spiked the punch with something that made the ponies tipsy, but had completely different results on the griffons in attendance. Female griffons swelled in size, growing a bit taller, their hips noticably wider, their asses big and jiggly, and breasts growing huge, with a great many lactating. Male griffons had their own equivalent reaction, cocks growing longer and thicker, and balls bigger and fuller, and able to squeeze nigh-impossible levels of cum from their balls now.

A few weeks later, whoever was at the party and spiked the punch acted again, tainting the water supply of Griffonstone. Those pony elements were able to stop it from going too crazy, but there had already been enough leached into the water. Eventually its effects subsided, but its damage had already been done. Every griffon in Griffonstone had been effected in one way or another, with basically every female big and bouncy and every male turned into a stud for breeding. In the months since, no griff's size had lowered, especially not those who had been dosed at both the party and the town. Those double-dosed would likely never see their bellies again until they became mothers, with their new titanic size. Hips so big they were locked in a strut just to walk, butts that jiggled with each step, and breasts heaving and leaking milk as they went. Beyond even that, since everyone's libidos seemed to gain a massive spike, it meant this Breeding Day would be a huge fuck fest of supercharged libidos. Speculations of the effects of increased libido aside, a great many things were harder to do with their size - though Gilda had to admit it wasn't entirely bad. Her scones had become even more popular than they were with the pink pony's new recipe, ever since she swapped out the cream in the batter for one cheaper and more frequently available. But, between her newer size hindering her ability to make her scones, and the difficulty in finding clothes for her huge size, she didn't think the ability to use breast milk in her scones made up for enough.

She was swiftly knocked from her memories by her grandfather barging into the bathroom, as a chill ran down Gilda's spine from the implications. "Time's up! Let's go!" Grabbing her by the scruff of her neck, the old griff carried his granddaughter to the front door and dropped her there.

"WHAT?! I can't go the whole day naked! At least give me some clothes before fully chucking me out!" Rolling his eyes, Grampa Gruff walked back into her room before swiftly walking out with a couple pieces of fabric, and shoved her and the clothes out the door and bolted it shut before she had a chance to react. Squeaking in embarrassment she covered herself, before remembering that Gruff had stuffed clothes outdoors with her. Blushing and growling in embarrassment and anger, she gazed upon the clothes he had passed her, or the lack thereof - an old tube top of hers that she bought after being dosed at the party, but had simply not fully fit after the second dose, as well as a skimpy red thong. Barely anything, but with it being all she had, she struggled to get them on. The small size of both pieces of clothing made it difficult and very jiggly, but soon she had them on in a way that was at least passable for the day it was. A bit of her areola was visible beneath the bottom edge of her tube top, and her thong dug into her hips, sliding themselves higher and higher up and showing a prominent cameltoe in the fabric. Her plush ass ate the string in the back of it, only enough to cover her pussy and that was it. Through her tube top her nipples were extremely visible, and overall she was as good as naked anyways - and likely soon would be both practically and literally, feeling how thin the fabric was. All it would take would be the claws of a dedicated griffon, and the fabric would be as good as ribbons, and in a similar form as well.

Taking stock of her situation and realizing just how screwed she would be, literally, if she simply stayed here stuck in reflection, Gilda darted off to the shadows of the alleys across the street from her home, beginning a day she wouldn't ever forget...

Author's Note

So this is the beginning of a story that came about from a conversation I had with Ebony Stallion recently, of a concept he had and shelved years ago. Let's see where it leads, as it'll be a journey for all of us as I try to spread my wings again and write after years away. Criticism is welcome. See something wrong? Want to say you like the idea? You think I'm a fat lazy piece of shit that needs to die? Go right ahead and tell me in the comments.

And yes, I will be looking for an editor for this soon, but it's late and I need to upload this before I shelve it and never look at it again.