I used NovelAI's unlimited gen membership for $25 a month. Note that "unlimited" is kind of a lie, it's only unlimited if you're under a certain resolution and only if you're not using any of the advanced features. Upscaling and other features cost the on-site currency, which the membership gets you 10000 a month. That should be more than enough for a month, but you can burn through it quickly since NAI gens so quickly.

The afternoon sun beat down on the grassy clearing just outside Ponyville, the sky a brilliant blue with a few fluffy clouds drifting lazily overhead. It was the kind of perfect weather that made Fluttershy feel safe and calm, until the thunderous roar of massive wings split the air.

“Fluttershy!” Gilda’s voice boomed like an avalanche, laced with that signature griffin sneer. The huge female griffin landed in a crouch, her golden-brown body towering over the smaller pegasus. She was a vision of raw power—twice the size of most ponies, her chest and arms rippling with thick, sweat-slick muscle, her breasts heavy and firm even at rest. Her white-and-purple feathered hair framed a sharp, violet-eyed face twisted in cruel amusement. A long, thick brown tail flicked lazily behind her, and her wings were half-spread, casting a shadow that made Fluttershy’s knees tremble.

“G-Gilda?” Fluttershy squeaked, her voice tiny and trembling as she backed away on her wings, pink mane fluttering. “W-what are you doing here? I-I was just trying to help those poor baby birds in the forest, but I can come back later—”

“Shut your yap, prissy pony!” Gilda snarled, her yellow beak opening in a wide, mocking grin. She grabbed Fluttershy by the back of the neck with one massive clawed hand, hoisting the smaller pegasus off the ground as easily as if she were a doll. “You’ve been hiding out in your stupid forest all day, playing princess while I’ve been waiting. And now… you’re going to pay.”

Fluttershy’s green eyes widened in terror, tears already pricking the corners. “P-pay? Gilda, please! I-I don’t understand! Let me go! I-I’ll do anything you want, just please don’t—!”

“Anything?” Gilda laughed, a deep, mocking bark that echoed across the clearing. She dropped Fluttershy roughly to her knees on the soft grass, then spun around with impossible speed. The motion made her enormous ass cheeks clap together, the impact so thunderous it rattled Fluttershy’s teeth. The griffin bent at the waist, presenting her backside directly to the cowering pegasus. “Oh, you’ll do plenty, dweeb. Now… kiss it.”

Fluttershy’s mouth fell open in horror. “K-kiss your… your what? Gilda, no! That’s disgusting! I-I can’t! Please, I’m begging you—stop! I’ll scream for the others, I swear it!”

Gilda’s eyes flashed with cruel delight. She reached down, grabbed Fluttershy by the long pink mane with one clawed hand, and yanked hard. The sudden pain made Fluttershy cry out, her head jerked back so sharply that her neck whined. “Scream all you want, feather-brain! No one’s coming to save your weak little ass!” She gave the mane another brutal tug, twisting it like a rope, forcing the smaller pegasus to stay on her knees. “And you’re gonna love it. You’re gonna bury that sniveling face right in my massive, sweaty ass and lick the stink right out of my crack. And if you do it good… maybe I’ll let you breathe.”

Tears streamed down Fluttershy’s flushed cheeks, her lower lip quivering. “N-no… please, Gilda… I don’t want to! Your ass is so big and hot and it smells terrible— I can smell it from here! It’s all… all sweaty and gross and I—I can’t kiss it! I’m sorry, I’ll do anything else, just not that!”

Gilda’s tail suddenly lashed out, wrapping once, twice around Fluttershy’s throat in a tight coil, pinning her in place. The powerful griffin’s strength was overwhelming; Fluttershy’s wings flapped uselessly, kicking up dirt and grass as she was forced forward. The scent hit her full force—thick, musky, overwhelmingly foul. Underneath the sunny afternoon air, the griffin’s ass reeked: a heavy, pungent combination of thick sweat, earthy musk, and something deeper, more animalistic, like spoiled berries left in the sun mixed with raw, unwashed power. It was the smell of a giant, dominant female who hadn’t showered in days, the kind of raw, heady odor that made Fluttershy’s stomach turn even as her body betrayed her with a shameful warmth between her legs.

“Smells that bad, does it?” Gilda taunted, voice dripping with mockery. She arched her back, spreading her colossal cheeks wider. “Good. That’s the smell of victory. That’s the smell of a pony who knows her place. Now open that pathetic little mouth, dweeb, and kiss it like you mean it!”

Fluttershy sobbed openly, her face inches from the massive, glistening anus. The lips were puffy, swollen from the heat, and already glistening with a thin sheen of sweat. The stink was so intense it burned her nostrils—thick, choking, rotten and sweet all at once, like a rotten peach left in a sweaty gym sock. She could feel the heat radiating off it, the subtle throb of Gilda’s powerful body behind it. “Gilda… I can’t… it’s so stinky! Please, I’ll be good, I’ll do your laundry, I’ll brush your feathers, anything! Just stop! I’m crying, I’m so scared! Don’t make me—!”

“Cry harder dweeb!” Gilda roared, yanking the mane again until Fluttershy’s head was forced forward. The smaller pegasus’s nose brushed the soft, hairy underside of Gilda’s ass, and the stench exploded in her face—cloying, overpowering, mixed with the faint salty tang of Gilda’s sweat that had soaked into the fur. It was everything: thick, greasy, musky, and undeniably female. Fluttershy’s eyes watered so badly she could barely see. “That’s it—sniff it. Get used to it. That’s the smell of my power. That’s the smell of me owning you.”

She gave the mane one last vicious twist, then shoved. Fluttershy’s face slammed forward into the warm, yielding flesh of Gilda’s ass cheek. The impact was soft but inescapable. The pegasus’s mouth, still open in protest, found the puffy anus right in front of her. The first wet kiss was involuntary—her lips pressed against the slick, twitching muscle, and the stench flooded her mouth: deep, animal musk mixed with the sharp tang of unwashed sweat and something heavier, almost fecal, like a massive body that hadn’t bathed in weeks.

“Mmmph—!” Fluttershy tried to pull back, but Gilda’s tail tightened, cutting off her air.

“Kiss it, you pathetic dweeb!” Gilda commanded, her free hand reaching down to spread one massive cheek even wider. “Tongue it out! Lick that stinky hole like the loser you are!”

Fluttershy gagged, tears pouring down her face as she was forced to kiss the anus again—harder this time. Her lips sealed around the puffy ring, and she felt it twitch against her mouth, warm and wet and pulsing. The taste hit her next: thick, bitter musk that coated her tongue, mingled with the salty sweat dripping from Gilda’s body. She could taste the raw power of the giant griffin—musky, earthy, overwhelmingly dominant. Her small wings flapped frantically against the grass, but Gilda’s weight and strength pinned her perfectly in place.

“Ewww— it’s so bad— Gilda, please, I’m begging you— it tastes horrible! Your ass is so huge and it stinks up my whole world! Stop— I’ll do anything—!”

Gilda’s violet eyes gleamed with pure, sadistic pleasure. She could feel the smaller pegasus’s desperate struggles, the hot tears soaking her ass, the way Fluttershy’s tiny tongue flicked helplessly against her anus. It was everything she’d dreamed of—dominating the weak, timid Fluttershy, making her cry and beg and kiss the most powerful, stinking ass in Equestria. Her massive body trembled with building pleasure, muscles flexing under sweat-slick skin.

“Yes… yes! Keep kissing it, you sniveling little pony!” she growled, voice husky with lust. “That’s it— bury that crying face right in my massive ass! I can feel you shaking! I can smell how much you hate it— and it’s making me so fucking hard!”

Fluttershy was sobbing now, full, broken sobs that shook her entire body. Her small hands clutched at Gilda’s thick thighs, trying to push away, but the griffin only laughed and yanked her closer. “No— please, Gilda, I’m so sorry— I’ll never tell anyone, I’ll never breathe a word! Just let me go— your ass is so massive and it’s smothering me— I can feel how hot it is— it smells like… like victory and sweat and everything I hate! Please stop— I’m crying so much— I can’t breathe—!”

But Gilda was past listening. Her tail squeezed tighter around Fluttershy’s neck, and she started rocking her hips, grinding her colossal ass against the smaller pegasus’s face in slow, deliberate circles. The pressure was immense—her cheeks spread wide, her anus kissing Fluttershy’s mouth again and again. The scent was unbearable now, almost dizzying, thick and cloying, mixed with the building musk of Gilda’s arousal. The pegasus could taste it on her tongue with every desperate kiss: the deep, animal funk of a giant, dominant body, the salty sweat, the earthy heat.

“I’m gonna cum for you, dweeb,” Gilda panted, her voice thick with pleasure. “Gonna squirt all over that sniveling face while you kiss my stinky ass. Feel it? That’s the power of a real female.”

Fluttershy’s world narrowed to the wet, insistent pressure of Gilda’s anus on her lips, the overwhelming stench filling her lungs, the tears streaming down her cheeks. She gagged again, but the giant griffin’s strength held her fast.

Then Gilda tensed—her massive ass cheeks clenching, her tail whipping once in ecstasy. “Here it comes—!”

The first powerful squirt erupted from Gilda’s puffy pussy— a hot, thick jet of clear fluid that splashed across Fluttershy’s face and mane. It was warm, sticky, and strangely sweet-tasting, like heavy cream mixed with musk. More followed—powerful, rhythmic spurts that painted the smaller pegasus in Gilda’s overwhelming feminine essence. Fluttershy’s eyes went wide in pure dismay, the stench and taste and heat overwhelming her senses. She tried to turn away, but Gilda’s grip was iron.

“Aaah— yes— take it all, you pathetic pony!” Gilda roared, her own climax crashing over her. Her thick thighs shook, her massive breasts heaving, a low, victorious growl tearing from her throat. “Kiss my ass while I soak you— that’s right— you’re covered in my victory!”

Fluttershy was drowning in it—the hot, viscous fluid soaking her precious pink mane, matting it against her tear-streaked face, running in rivulets down her trembling neck. She gasped, choking as the bitter-sweet liquid filled her mouth, coating her tongue with Gilda's overwhelming essence. The taste was vile yet intoxicating, like spoiled honey mixed with salt and something deeper, darker—something that spoke of Gilda's absolute dominance.

"Oh—oh Celestia, no!" Fluttershy whimpered, the words muffled by the fluid coating her lips. "It's— it's everywhere! M-my mane... I just brushed it this morning!" Fresh tears streamed from her wide, terrified green eyes, mixing with the griffin's cum as it dripped from her chin onto the grass below. Her small body convulsed in helpless, ragged sobs that shook her entire frame. Her wings, usually so soft and pristine, were now plastered to her sides with the sticky evidence of her humiliation.

"I—I feel so dirty," she cried, her voice breaking with each gasp. "I can't— I can't breathe right! It's in my eyes, it's in my nose... Gilda, please, I'm sorry for whatever I did wrong!" Her mane, once a beautiful cascade of pink silk, was now a limp, tangled mess, heavy with Gilda's release. Fluttershy's mind raced with panicked thoughts—what would her friends say if they saw her like this? How could she ever face them again, covered in the griffin's fluids, smelling so strongly of her violation?

Her tiny hands trembled as she tried to wipe her face, only succeeding in smearing the sticky fluid further across her cheeks. "I— I want my mommy..." she whispered, the words so soft they were barely audible. "I just want to go home... Please, Gilda, please stop... It's so warm and sticky and I—I can't stop shaking..." The violation felt absolute, as if Gilda had marked not just her body but her very soul with this degrading baptism.

Gilda threw her head back and let out a booming laugh that echoed through the clearing, her massive chest heaving with each deep chuckle. Slowly, she uncoiled her tail from around Fluttershy's neck, releasing the pegasus with a final condescending squeeze. She turned with deliberate, predatory grace, her colossal ass still glistening with sweat and the remnants of her climax, the muscles twitching with lingering pleasure. With a smirk that could curdle milk, she patted Fluttershy's drenched head—hard enough to make the smaller pony flinch—spreading more of her fluids into the already-soaked pink mane.

"Look at you," Gilda gloated, her voice thick with smug satisfaction as she gestured at Fluttershy's pathetic state. "All covered in my victory like the worthless dweeb you are. Bet you never felt so alive, huh?" She leaned closer, her hot breath wafting over Fluttershy's tear-streaked face, reeking of dominance and raw musk. "You should be thanking me. I just gave you the honor of being marked by the strongest griffin in Equestria. That's more than a weak little pony like you deserves."

Fluttershy whimpered, trying to curl into herself, but Gilda wasn't done. The griffin stretched her arms above her head, flexing her powerful muscles and making her enormous breasts sway invitingly. "I could do this all day, you know," she purred, her violet eyes gleaming with cruel amusement. "Nothing gets me off more than putting scaredy-ponies like you in their place. The way you cried, the way you begged—it was music to my ears. And the best part? I know you secretly loved it. All you timid ones do—deep down, you're just waiting for someone strong enough to show you what you're really for."

She leaned down again, bringing her face uncomfortably close to Fluttershy's, her sharp beak just inches from the pegasus's nose. "I can still smell your fear mixed with my stink," she whispered conspiratorially, her tone mocking and intimate. "It's intoxicating, isn't it? Knowing that I own every inch of you right now, that you're nothing but a pathetic plaything for my amusement."

Gilda straightened up, placing her hands on her hips in a pose of absolute dominance. "Now get out of here before I change my mind and decide to keep you as my personal ass-wiper. And don't you dare wash that cum off until I say so. I want everyone in Ponyville to see you walking around marked as my property."

As Fluttershy scrambled to her hooves, still trembling and covered in Gilda's essence, the griffin called after her, "Oh, and Fluttershy? Next time, I'll have you kissing it for real... and crying the whole time. And I'll make sure it's even stinkier and sweatier than today. Think of it as your training—learning to love the taste of a real winner." With a final, booming laugh, Gilda watched her victim flee, her massive body humming with the satisfaction of a bully who had just had her most thrilling conquest.

Fluttershy had never hated someone before.