A war was being fought between Humanity and the races of Monster Girl that infested the world. While the lesser races were had and bred like wildfire with the beasts, the white race was the one that stood the most stalwart against the tide of horny monster sluts that vied for the subjugation of the human race. Using as brutal tactics as were used against them, White Men were breeding non-whites at an incredible pace but the white women were revered as breeders as they kept the race going. Non-white women worshipped them for their ability in seducing and keeping men, clustering in harems around the white men and subordinate to their white masters.

Non-white men were kept as slaves by the various monster girls, breeding their infernal cunts with numbers but not power. The most aggressive and domineering of the race that most men had encountered was the Hellhound. Single minded, brutal, and determined as anything could be, they refused to give up a mate once they had him and they had a taste for the strong since they wanted to prove their own dominance over him.

As it was when one man was caught by a Hellhound. A prize if ever there was one, as his white skin marked him as a trophy mate amongst monster girl kind and his heavy sack told her he bred prolifically. The first coupling was rough, no care had for the man's comfort as she plunged his fat white cock into her infernal depths and rode him into the ground. Her nails dug at his skin and her slobber coated his flesh, his hands dug and smacked and clawed helplessly at her body and the fires of her eyes burned with devilish joy when she pinned his hands down riding him to his completion. But she kept going, and going, and going, until his cock went limp and the fatigue wore at his body.

Dragging her prize away to a secluded lair, she continued this ritual breaking him down as a man and turning him into a perfect hellhound mate. Now, she came into the den that was decorated like some mockery of Zulu and Japanese artistry and strode to him with confidence. In the time she'd had him, her hips had filled out considerably and her tits had enlarged. The fur around her neck, the mane on her head, and the cuffs of fur around her wrists were silky and beautiful against her charcoal colored skin.

Her mate inspected her with a glint one could only call loving. After all, she'd broken him for any woman, human or otherwise. He belonged to her and her alone. Taking a deep sniff of the air, his natural musk already had her cunt dripping. Her thighs rubbed together when she walked smearing her wetness between them and her tail wagged slow but confident while his cock stood straight like a rod of God and the pre that dribbled from it told her he needed her cunt.

He wasn't allowed to masturbate and while such a rule would usually come with chastity of some kind, she broke that out of him too. Whenever he'd jack off, wasting his precious seed, she'd punish him something awful. Chastity was the least of his worries when his balls ached for weeks on end for release that never came, only allowing weak dribbles when slight slack was given. No where the kind of release he needed.

So he learned: Seed belongs to his Hound. 

When she came to stand next to the makeshift bed, she propped one leg up revealing her sex to him. His instinct told him to lean up and eat like a starved man, but he knew better. He looked up for just a second then down at the floor. 
The hound's tail wagged a bit faster for just a second, but then slowed. He had learned. "Eat me" she ordered grabbing the back of his head and pushing his face into her crotch burying him past his nose in her pussy. It smelled of the sweat of exertion after a long hunt, the sweetness of a healthy woman, and the musk of a cthonic beast and it drove him wild. He didn't need more orders as he did as he was told, eating her pussy exactly how she liked it. 

Gentle pressure on the clit with tongue, face fully buried, and plenty of nibbling on her lips and clit. She was a tough bitch, she could take more, but he did as she ordered or else. 
Her moans were sweet, but two-pitched. As though a deeper voice lie behind her higher, feminine voice. Husky, sultry, contrasting the sweet and girly voice above. He paid no mind to it beyond what he heard, though, he only listened for words. She owned him now, he knew it, but in the back of his mind..

She hooked a leg around his shoulder and practically mounted his face while standing with one hand on the back of his head. "Use your hands," She orders, allowing one of his ears to stay open. He immediately sets to it and his hands grasp at her ass gripping at her cheeks and spreading them open, worshipping her body with hand and tongue. He'd learned how to eat and breath, allowing breaks in the hermetic seal her cunt would form on his face so he could take a breath of the hot, wet air before he went back into her. 
She unhooked her leg from his shoulder and pushed him away as though he disgusted her. He landed on his back, panting and staring at the cieling. Best not to risk her ire. 

She walks over him and rubs her soaked cunt with a clawed hand. "Time for breeding, my mate." She whispered then slowly crouched above him before getting to her knees. In truth she found she could love him. He listened to her oh so well and the talent of his tongue would be legendary among other Girls. But he belonged to her and her only. 
She positioned herself in a way where her cunt would slide along the underside of his shaft and started grinding, humping at him while panting softly. "Look at me," She orders gently causing his gaze to shoot from the cieling to her firey eyes, the fire around them intensifying her lustful gaze, his expression was being held neutral for fear of punishment and for it she grinds slow but forceful, trying to get a reaction out of him, testing his resolve. 

It holds and she grins, chuckling as she reaches up to caress his face. "Such a good boy," she moans leaving a trail of her juices on his already wet cheek "I want you to let it all out into me tonight. No wasting, you will breed me." She makes her decree and sets it in proverbial stone and he has no choice but to agree. She shifts her position a bit and leans forward to kiss him deeply, receiving a tentative kiss back. Her smile is warm and the heat of her cunt makes his cock hurt with need when she lifts herself up and positions herself over his cock.
"You have my permission to let it all out tonight." She plunges herself down on his cock suddenly, earning a loud groaning moan from her mate as he grabs her hips and presses his own into her. He bottoms out instantly, sinking his cock into her perfectly hellish depths. 

It was super human endurance and will that kept him from cumming on the spot, because he knew his mistress wanted more. She always wanted more. Her own two-voiced moan filled the cave intermingling with his and with the fire flaring out from her eyes she rode his cock as she had so many times previously. But a marked difference catches a part of her mate's mind off guard. It's rough, of course, but loving. She rides his cock as though she'd come to need it for more than breeding. Her hands rest on his chest feeling his heart beat through sensitive pads on their undersides and the rush of it makes her eyes roll back in ecstasy. 
Her mate's cock plunges into her, the two meeting creating obscene slapping noises that fill the cave with as much noise as raunchy smell of sulfrous sex. "Ohhh fuck!" She cums all over his cock with reckless abandon, expertly keeping him inside her despite the rough bouncing.

"Cum inside me!" She orders her mate, looking down at him with a wide grin. Her ebony skin, black fur and mane mixed with the fire around and in her eyes is frankly a frightening one but he fucks right through it and grabs her around her waist and with nails dug into her flesh he brings them together with a kiss, her scream muffled when his prolific load fills her cunt.
She knew that it would be that night she would take, creating a beautiful litter of hellhound pups. But whether or not she knew that the power of white seed overtook the Monster Girl genetics at least partially was up for debate.
After all, her obedient mate was fighting a war. One that with every litter of pups born, he was winning for the real master race. 
The war to make subservient the wild Monster Girls. 
Starting with the most wild of all.