Milly was playing in her room when a knock emanated from her frilly-pink-decorated door. Her German Shepherd ears perked up and her tail began to wag out of loving habit.
"Daddy?!" Milly called out, restraining any excess whimpering. 
"Milly, love, I have a gift for you! Come on out and get better acquainted." Said Teliver, Milly's father, an older Gshep anthro. The young cub-loli girl stood up and dried off any remaining traces of spunk from her finger-paws, remembering what happened the last time she was caught by Daddy, fingering herself off to old photographs of him as a young strapping lad of seven, fantasizing how awesome it would be to time-travel and let her own father, even younger than her, slam his knot deep into her young tight shepgirl kitty. 
"C-c…coming!" Milly said, literally holding back the urge to cum hard on her pink striped panties. She licked her finger-paws clean and tromped across the floor, unprepared for what she'd open up to. She turned her doorhandle and flung it wide open to her father, an older gentlefur in his forties, holding a leash attached to a collar wrapped around the scruffy neck of a handsome German shepherd dog, a feral creature with slender robust animalistic features. He was perched down flat upon his haunches, wagging a fluffy tail, tongue lolled against his jawline, bright expressive brown eyes gazing up at her with loving candor. 
"Oooh Daddy, he's so cute!!! I love him!!" Milly squealed, kneeling down to greet the dog with a child's awestruck fascination. Teliver chuckled and grinned with devious intent. "Thank you!!" Milly said, letting the dog lick her cheek, petting his ears and chest and back.  He whimpered and began to kick his rear leg out of habit, savoring the chance of getting his sweet-spot scratched at by his cute new youthful master and owner.
"Sure thing, love. Happy Birthday to you!" Teliver said, leaning down to kiss Milly's muzzle, planting a tender lick upon her snout for added loving emphasis. Milly moaned and gazed up at her daddy, completely smitten with romantic affection. "Your aunt Fern also sends her regards and apologizes for not being able to make it today. She got held up, you understand, right?"
Milly nodded, comprehensive with understanding and humbled grace. "I know, she's a busy lawyer-person. I still love her though! Thank you so much, Daddy, he's an awesome doggy!!" Milly said through a brimming milky-white grin, adorable enough to melt even the most steel-laden of hearts. 
Teliver snickered and pet the dog's head. "You're very welcome. Why don't you go ahead and try to teach him a new trick or two?"
"That's a great idea! I always hear about how smart us sheps are, so he should be no different, right?"
"Spoken like a true genius! That's my daughter. I'm so proud of you, love." Teliver said, hugging his beautiful young child. "Right, I need to tend to some business downstairs. When you've come up with a cool new trick, don't be afraid to give your old man a holler and I'll come see what you've discovered."
"Do you think he could sit, or beg, or roll over? Maybe even speak?"
"I think by the time you've finished training him, he'll know how to tango."
"Daddy!" Milly exclaimed through a giggle, imagining how funny her new pet would look dressed in a fancy suit, twirling her in her own extravagant dress, dancing the night away in Latina-influenced style.
~
"Okay Doggy, let's see what kind of cool new tricks you can do."
The dog sat down squat-centered in her room, attentive and admiring of his new owner. She kneeled down beside him and picked up a Mickey Mouse doll, impersonating his voice and moving his arms like a puppet. "Do ya have a name, young lad?"
The shep barked in response, eyes alit with excitement, tail thumping against the carpeted floor of Milly's pink-heavy bedroom. 
"Oh, you do? What's your name? We should give you a new one. How abouuut, ummm…" Milly thought hard, looking at the feral creature. Her gaze inadvertently trailed down between his legs and she caught sight of something that spiked her lewd raunchy train of thought extensively.  "Oh, I wonder if you'd like Mickey? Wanna be named Mickey, doggy?"
The German Shepherd stood up and ran over to her, pushing his snout into her crotch and sniffing wildly. Milly gasped and shrieked softly as she reacted to his sudden impulsive actions. She reached down to cover her crotch, pressing her finger-paws against the cottony folds of her panties. Mickey attempted to nudge her hand-paw free from her crotch, licking her sensitive regions extensively with a hunger for lust. 
"Oh, you're really friendly! Gosh, no wonder Daddy chose you to be my pet!" Milly's heart began to race gradually as she decided to let him have his share of her lot. She removed her hand-paw and placed it upon his head instead, scratching at a tender spot between his ears. The dog panted and lapped hungrily at her groin, causing her to moan and wince with pleasure. Milly could feel herself getting very moist and she opted to spread her legs a bit, holding her pinstriped skirt up for Mickey to easily access her most private areas. The dog knelt down to a flat position, lying his rear end flat on the ground and placing his large canine paws flat upon Milly's bright vivid hot pink bedroom carpet. 
"Mmmnnnf, lick me… good boy… just like Daddy does… aaah, don't stop, please don't stop…" Milly trembled and whispered, voice husky with arousal, eyes glistening raw and lucid with an absolute erotic feverish presence. Milly pulled her panties aside, exposing her pink, fleshy girly-bits. Mickey yapped aloud and immediately buried his muzzle into her vaginal folds, lapping away with reckless abandon, breathing hard and heavy against her tiny youthful clit, whiskers tickling her pussy relentlessly.
"Aaah! Jeez, slow down! That tickles!!" Milly giggled, balancing the ticklish sensations with explosive nuances of naughty arousal. Her estrus was kicking into overdrive and her delightfully tight little tailhole puckered in reaction to Milly's pre-emptive orgasm. She bit down on her lower lip and breathed heavily, almost hyperventilating, as she leaned her head back and let her body curl into a backwards arch, legs spread very wide and pussy lips spread wider by her saliva-slickened finger-paws, holding her rich youthful cunt spread wide open, inviting Mickey's slickened sandy dog-tongue in for many lapping sessions. 
The dog had other ideas already.
Milly raised her butt up and felt her panties rip free from her hips, slide down across her thigh, resting at her knee. She'd torn them from being overstretched but cared not, for the weight of Mickey now graced her hips and she could feel his throbbing knotted dog-dick attempt to make contact with her swollen drippy pussy. She snickered beneath her breath, wondering what Daddy would think if he walked in on the both of them right then and there.
~
Teliver was stood just outside Milly's bedroom door, cracked open, peeking in, catching a glimpse of his daughter getting shagalicious with the new feral pet he'd adopted from his own older sister, she whom he'd lost his own virginity to at a young age, when Fern taunted and teased the young cub-lad into a dare, which was lost, along with any further restrictions felt between their love for one another. Teliver stroked off at his own knotted dog-dick, savoring the sight of his tender young precious jewel receiving serious bestial sex. He knew he wouldn't last for much longer at the rate in which he was going.
~
"I'm not gonna last much longer at the rate we're going, boy…" Milly whispered beneath her breath, almost to herself. She placed her Mickey Mouse doll beneath her bum as a pillow, a hoisting mechanism, an easy tactic to allow her new pet to bury his knot deeper inside her, which worked most effectively. Mickey slid himself into her extremely tight young underage nine-year-old pussy. Milly drooled from a corner of her black shepgirl lips and Mickey lapped away at the drool trail as he thrust violently, humped himself into his new master with loving intensity. Milly hugged the large beast close to her body and felt his erection slip and slide repetitively into her. 
"Aaah, yeah! F-…fu…fuck me! Fuck me! Good boy! I love you! Good boy! Mmmn, yes! Thank you Daddy, thank you thank you thank youuuuaaaAAH! Ah! Ah!" Milly shrieked and gasped, catching her wind, completely aroused and knee-deep in sweltering lustful appreciation. She could feel the dog's orgasm erupt from within her deepest shepgirl regions, could feel his testicles strain and flex against her cum-drenched tailhole, could feel his throbbing heartbeat echo into his knot, which grew and swelled around the stretched-tight surface of her twat.
~
Teliver stroked himself into a delirious fit of orgasm, ejaculating upon the ground outside his daughter's bedroom. When he leaned forward to embrace the rush of climax, his head bonked against her door and swung it wide open. Milly's eyes averted from Mickey's fluffy shepherd's face to her own father's shocked reactionary staring glare of embarrassment and awkwardness. The young shepgirl only smiled and giggled with naughty persistence, wrapping her legs tightly around her newfound pet's waist, rubbing his back with tender loving caresses. Teliver's lips creased into a sufficient grin of contented glee and he kept on stroking, despite the flaccidness moving in to diminish his incestually-provoked boner.
"Daddy, can we keep him? Like, for real? Pretty pleeeeease?" Milly asked, cheeks dampened with canine slobber, petite body sprawled wide and spread-eagled in a most luscious manner, her poor Mickey Mouse doll completely drenched in dog sperm while her own fluffy tail wagged against Mickey's hind-legs. A cloying scent of sex pervaded the air in her bedroom, enough to set off any horny males with the rich, succulent aroma of musk and endorphins.
Her father's answer pleased Milly significantly.
END