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.

In the cozy confines of Roger and Anita's London flat, the evening sun cast a warm, golden glow through the windows, painting the room in hues of amber and crimson. Pongo, the sleek, spotted Dalmatian with his muscular frame and piercing blue eyes, paced restlessly across the Persian rug. His red collar gleamed under the light, a symbol of his domesticated life, but tonight, his primal instincts burned hotter than ever. Across the room, Perdita—elegant, refined, with her glossy white coat dotted in perfect black spots—lounged on the velvet chaise, her slender body radiating a subtle heat that filled the air with the musky scent of her estrus. Her blue collar matched his, but her eyes, soft and inviting, held a spark of desire that made Pongo's heart race.

"Pongo, darling," Perdita murmured, her voice a sultry whisper that sent shivers down his spine. She stretched languidly, her tail swishing seductively, exposing the soft underbelly and the swollen, pink folds of her heat-swollen vulva. The air thickened with her intoxicating aroma—a heady mix of sweet feminine musk and fertile readiness that made Pongo's nostrils flare. "I've been waiting all day. I can feel it... I need you inside me. Make me yours completely."

Pongo's virility was legendary among the canine whispers of the Twilight Bark; tales of his potency had spread like wildfire through London's dog packs. His balls, heavy and full, hung low between his powerful hind legs, churning with an endless supply of potent seed. His sheath, already bulging, twitched as his massive, knotted cock began to emerge—thick as a human wrist, veined and throbbing, a deep crimson red that glistened with pre-cum. The sight of Perdita's arousal made it swell even further, reaching an impressive length that promised to stretch her to her limits. "Perdy, my love," he growled, his voice deep and commanding, laced with raw hunger. "You're in heat, and I'm going to fill you until you can't take anymore. I'll breed you with a litter so vast, the world will marvel at my potency."

He approached her slowly, his paws padding softly on the rug, each step building the tension. The room smelled of polished wood, fresh linens, and their mingling scents—his earthy, masculine musk overpowering her floral heat. Perdita rolled onto her back, exposing herself fully, her paws playfully batting at the air as she whimpered invitingly. "Oh, Pongo, you're so big... so strong. I want to feel every inch of you. Don't hold back—make me scream."

Pongo nuzzled her neck first, his hot breath against her fur sending electric tingles through her body. His rough tongue lapped at her ear, tasting the salty tang of her excitement-sweat, before trailing down to her throat. She arched into him, her body trembling as his teeth grazed her skin lightly—not biting, but teasing with the promise of dominance. "You taste like heaven, Perdy," he rumbled, his voice vibrating against her. "Sweet and ready for me."

Lowering his head, he buried his muzzle between her hind legs, inhaling deeply the intoxicating perfume of her arousal. Her vulva was slick and swollen, dripping with clear nectar that coated his nose. He lapped at her eagerly, his broad tongue flicking over her sensitive clit, sending jolts of pleasure through her. Perdita gasped, her body bucking as waves of ecstasy built. "Pongo! Oh god, your tongue... it's so rough, so perfect!" she cried, her voice high and breathy. The taste exploded on his tongue—tangy, sweet, like ripe fruit mixed with her unique essence. He delved deeper, thrusting his tongue inside her tight channel, feeling her walls clench around it.

Perdita's first orgasm hit her like a thunderbolt. Her paws scratched at the chaise, claws digging into the fabric as her body convulsed. "I'm cumming! Pongo, yes—ahhh!" she howled, her juices flooding his mouth in a gush of warm, sticky fluid. The sound of her cries echoed off the walls, a symphony of pants, whimpers, and wet slurps. Her scent intensified, filling the room like a fog of pure lust, making Pongo's cock throb harder, pre-cum dripping in thick strands onto the floor.

Unable to wait any longer, Pongo mounted her with primal urgency. His front paws gripped her shoulders, his muscular body covering hers completely. The tip of his enormous cock pressed against her entrance, hot and insistent. "Feel me, Perdy," he snarled, thrusting forward in one powerful motion. Her tight pussy stretched around him, enveloping his girth with a delicious friction that made them both groan. She was so wet, so ready, but still, her walls gripped him like a vice, milking every vein as he sank deeper.

"Oh, Pongo! You're splitting me apart—it's too big, but don't stop!" Perdita wailed, her eyes rolling back in bliss. The sensation was overwhelming: the burning stretch, the fullness that reached her core, his knot already swelling at the base, promising to lock them together. He began to thrust, slow at first, each plunge eliciting squelching sounds from their joined bodies. The air grew heavy with the slap of fur against fur, the wet smack of his balls against her ass, and their mingled moans.

Pongo's virility shone through as he picked up speed, his hips pistoning like a machine built for breeding. His cock hammered into her, the knot bumping against her entrance with each drive, teasing the ultimate tie. "You're mine to breed, Perdy. Feel how potent I am—my seed is endless, made to fill you with life." Sweat glistened on their coats, the salty taste mixing with their kisses as he nuzzled her fiercely. Her second orgasm built rapidly, her body shaking beneath him. "Harder! Deeper! Make me explode!" she begged, her tongue lolling out as she panted.

He obliged, slamming into her with ferocious intensity. The room spun for Perdita as pleasure overloaded her senses—the sight of Pongo's powerful form above her, muscles rippling; the sound of his grunts and her own screams; the smell of sex thick in the air; the taste of his fur as she nipped at his neck; the feel of his cock reshaping her insides. "Cum for me again, my love," he commanded, and she did—her pussy clenching rhythmically around him, squirting fluids that soaked their underbellies. "Pongo! I'm shattering—ahh, yes, breed me!" Her orgasm was mind-blowing, waves crashing through her, making her vision blur and her body go limp in ecstasy.

But Pongo wasn't done. His extraordinary potency allowed him to hold back, his balls churning more seed, ready to flood her. He flipped her onto her stomach, mounting her from behind in a dominant doggy style that made her yelp in delight. "Take it all, Perdy. I'm going to knot you and pump you full." His thrusts were brutal now, extreme in their force, each one jarring her forward. The knot, now fully swollen to the size of a fist, popped inside her with a wet pop, locking them together. Perdita's eyes widened, another orgasm ripping through her instantly. "It's in! Oh god, Pongo, your knot—it's huge! I can feel it pulsing!"

Tied together, Pongo's cock erupted like a volcano. His virility unleashed in torrent after torrent of thick, hot cum, flooding her womb with potent seed. "Feel my power, Perdy! I'm impregnating you—101 pups, all from my endless potency!" he roared, his body shuddering as he pumped rope after rope inside her. The sensation was intense: the pressure building in her belly, the warmth spreading like fire, her walls massaging every spurt. Perdita's orgasms chained together, one after another—mind-blowing peaks that left her howling incoherently. "Yes! Fill me—breed me with your litter! I can feel them already—ahh, Pongo, you're amazing!"

They remained locked for what felt like hours, Pongo's knot ensuring not a drop escaped, his seed taking root in her fertile depths. The room reeked of their passion—sweat, cum, and satisfaction. As the knot finally deflated, he pulled out with a gush of fluids, collapsing beside her. Perdita nuzzled him, her body glowing with aftershocks. "Pongo, that was... incredible. I can feel your potency inside me. 101 Dalmatians—our legacy."

Pongo licked her cheek, tasting the salt of her tears of joy. "And this is just the beginning, my love. My virility knows no bounds." In the quiet afterglow, as the moon rose outside, they knew their family would be extraordinary, born of this intense, extreme union.