Two sergals relax on their leather couch at home, one is much smaller than the other, but they share coloration and markings. If anyone were to see them in the privacy of their own home it would be apparent they were related, probably father and daughter. 
The girl is a bit thin but just as gracefully curvy as any other sergal women, her flat chest telling of her immaturity. She's wearing a hoodie that's too big for her and a pair of panties, her current favorite sleep outfit. The hoodie smells like daddy and it's comforting to smell as she drifts off.
Her daddy is a bit more muscular, not athletic but clearly not a couch-potato. He's wearing his pajama bottoms and a jockstrap, it's not the first time she's surprised him with cuddles as he was relaxing on the couch. His job as a bar-tender leaving his fur smelling like all manner of alcohol and tabacco-smoke though he doesn't smoke himself.
He nuzzles into her head-fur lovingly, lightly ruffling her hair. She smells like coconuts and strawberries, the scent of her fur-conditioner. She flicks her ears and giggles at the ticklish sensation. He hugs her tighter as she wiggles playfully, intentionally or unintentionally rubbing her thin panties against his package.
"You are so handsome daddy" She whispers into his chest-fur, his ears swivel to catch the muffled complement.
"Thanks Rylie, you're a cutie too" He replies, pulling back to smile warmly at her. He knows what she is going to ask for before she's said it, this isn't the first time they have been in this situation. Once or twice a day for nearly a month now.
She is blushing and takes his larger hand into hers. "Can we play daddy?" She asks, her tone innocent enough but the meaning behind her words speak volumes.
"Alright hon" He nods and smiles. He presses a kiss to her muzzle, briefly tasting the inside of her muzzle as she does the same.
Her hands find the edge of his shorts and the jockstrap, he hops a bit, letting her draw them down to his knees and off to expose his furry sheath to his gaze.
He leans in, sliding his hands up her thigh and draws her panties down and off. His hand gently cups the lips of her small sex, the thin tentacle of her clit-hood trying to wrap around his finger teasingly.
"A bit eager tonight aren't you?" He asks, chuckling deeply and rubbing her now-exposed clit.
"You were working late and needed to sleep before your next shift, I missed your touch~" She admits blushing and nodding. She wasn't kidding either, her lips are already obscenely wet against his digits. He glances down as her hands encircle the few inches of his cock that are jutting out of his sheath. He groans in pleasure and tugs her closer, his fingers now curling to press into her and grinding against her clit as he spreads her walls over and over.
He'd shift, getting into a position to start humping through her grasp and teasing more of his cock free. It isn't long before his entire length is erect against her body, his glorious sergal meat a full 18-inches long and nearly three-inches thick.
By the time his tip is oozing pre against her neck, her own muzzle is drooling. She carefully licks her lips clear of her drool and looks up at him, giving him her best puppy-dog eyes.
"Please fuck me daddy?" She begs, and he grins, under the cover of the hoody he traces a blue, glowing symbol against her belly, just under her belly-button. Preparation complete, he guides her to lean and fall back against the coffee-table and presses her hands over her head.
"But of course princess~" He hisses, lust and love clear in his tone. His pointed tip wedges her lips open, and he slowly eases his cock deeper, feeling her body clench around every inch he feeds her hungry passage.
She whimpers as her young body is spread indecently around his cock, only feeling pleasure thanks to her nearly daily training. 
"Yes~! Give me more daddy!" She loudly moans, causing him to pause for a second. She wants more, and they know the magic will keep her safe.
"Who am I to deny such a cute, little lady?" He asks, pulling back almost completely out of her tight, wet peach then hilts you in a single thrust. She lets out a lust-filled scream of pained-pleasure as his tip forces through her cervix. His cock makes a bulge along her body lewdly, disappearing under the bottom of her ribs and reappearing near her collar-bone. Her vagina and womb being forced to stretch without breaking thanks to his magic. He repeats nearly the entire motion again, getting into a rhythm and roughly fucking her as hard as he can. Their fluids start dripping down their thighs and filling the living-room with the smell of sex, their moans becoming louder as they can no-longer restrain themselves. Her legs wrap around his hips as her fingers rub her clit firmly in circles, but they aren't tugging him into her harder. Her legs are holding on for a point of stability as her body trembles and clenches desperately.
As their hips get wetter and slicker, the sound of their hips get louder and louder, joining the desperate, pleasured moans of both of them. With every thrust her body clenches faster and harder around his relatively massive cock.
She is the first one to cum first, crying out raggedly as her body spasms and twitches around his cock, the muscles milking his cock towards her willing womb. With a snarl of pleasure, he thrusts deep into her and unloads the contents of his balls into her stretched womb. He continues to grind into her, huffing for several minutes as he slowly inflates her poor womb.
A few minutes after his cum tapers to a stop inside her, he leans down to kiss her deeply again. His arms wrap around her body in a hug then lift her to carry her down the hall to the shower. She blushes as she realizes they aren't there to clean up.
He warns her before he flips her over, standing over the drain with her weak thighs to either side of his head. Her lewdly flowing cunt is exposed to his gaze and muzzle. He presses a lewd, deep kiss to her sex. He can taste her flavor under his saltier one. Her arms wrap around his belly in a hug, nuzzling into the fur and blushing.
"Daddy's thirsty princess" He informs, then creates a seal around her sex with his muzzle. She squirms as he licks just under her clit, near the top of her passage. He knows what he wants, and she relaxes, a bitter spray of her urine filling his thirst muzzle. His cock throbs in pleasure as he drinks her piss, oozing cum that spatters against the tiles under them. Because of her size, she doesn't have much to offer but that was about to change in a second. He flips her again, pressing her against the tiled wall and carefully pressing his cock-tip against her piss-hole. Her eyes widen in surprise, but he's not going to feed his meat bladder-deep this time. He relaxes enough to piss, keeping his tip docked in the exit to her own piss-hole. She lets out a surprised moan as her bladder gurgles, being refilled from his much larger bladder. Warmth leaks between them as the imperfect seal fails to prevent such, the urine joining the smell of sex wafting from their bodies. It's not long before her bladder is inflating a bit faster than her now leaking womb was.
She kisses him deeply this time, not flinching as she tastes her piss on his lips and sucking at his tongue. He allows her to suck his tongue, letting her swallow it's tip and start gently forcing her to deep-throat it.
It takes a bit longer for his piss to taper off, when it does he slowly pulls back his tongue.
"It's late, we can play some more tomorrow. You have school tomorrow" He informs her, her ears pinning back in disappointment. He presses against her distended lumps to get her to empty his cum and piss out against his cock and legs. "But..." Her ears go back up showing her attention was completely on him "If you promise to take a shower tomorrow-morning before school, we can sleep together naked" He promises pressing a shorter kiss to her muzzle.
"I promise Daddy!" She replies, nodding rapidly in eager agreement.
He sets her down, briefly kneeling to lick her sex clean and lifts his hoodie over her head to expose her undeveloped body and soaked thighs to his gaze.
He'd lift her into his arms and carry her to his bedroom, setting her on his bed and climbing into bed too. It's warm enough in the house that their fur is usually enough to keep them comfortable and tonight is no different. He flips off the lights and draws her back against his front. She can feel his cock press between her thighs and wiggles her hips teasingly to rub it and grind her clit against it. "Behave..." He admonishes as he gets comfortable in the dark, closing his eyes. She pouts at being denied but settles against his much larger form to join him in sleep a few minutes later.