You are a human male, exploring a graveyard alone at night. Suddenly, a large figure pounces on you and pins you to the ground. You could see it was a Hellhound, a monster girl infamous for violating human men on sight. She was panting heavily, and licked your cheek.
"Human! I am Cerberus! We mate! We mate!!" She said, already digging her claws into your clothing to tear it off.
In a twist of events. The 'Human' she thought she saw. Would instead be a Male Hellhound. Clearly sensing the Female's heat. He'd growl "Hellhound? Female? In heat? Rolzac mate with her! She mine!" He'd growl before grabbing her and pinning her to the ground. Revealing his already erect twenty inch muscular and girthy length. Diamond hard. He'd then begun to hump Cerberus's rear with his length. Preparing to mate with her.
She yipped in surprise as she felt something large and hard slam into her rear end, impaling her instantly. Her eyes went wide with shock but quickly turned to pleasure as the intruding male began to pump his hips back and forth, fucking her roughly and mercilessly. With a loud yelp, she tried to push him off but found herself unable to budge even an inch beneath his considerable weight and strength. As he continued to take her roughly, her own heat overwhelmed her senses and she let out moan after moan of pleasure, writhing and thrashing beneath him.
"Yes! Mate enjoying mating! Rolzac found new Mate to breed!" Rolzac would growl as he kept pounding her roughly and mercilessly. His twenty inch length thrusting deeper and deeper inside his pinned down prey as he ruthlessly mated with Cerberus
Cerberus moaned and howled with pleasure as the new male took her roughly, filling her up with his hot length again and again. Her body arched off the ground as she thrashed wildly beneath him, her nails scrabbling uselessly at the cold earth. Her eyes rolled back in her head, pupils nearly dilated completely as wave after wave of pleasure washed over her. "Mmmm," she moaned, feeling as if she could cum endlessly from his powerful thrusts and brutal pounding.
For a few hours the two would mate roughly. Rolzac pounding into Cerberus over and over again. Filling her up with his seed Eventually. After the 10th or so orgasm. Rolzac would howl as he orgasmed and stop thrusting. Once he was sure he had deposited his load. He'd pull his length out and growl "New mate filled. New mate shall carry Rolzac's pups!" He'd then lick her cheek and say "Rolzac go find more females to breed. Rolzac pleased" With that he'd proceed to walk off
As Rolzac's cock finally slid free from her exhausted body, Cerberus let out a tired sigh and collapsed to the ground, panting heavily. "Mmm... th-thank you..." she murmured weakly between gasps for air. Her entire being felt drained from both pleasure and seed. As Rolzac walked off, she watched him go with longing in her eyes, wondering if she would ever see the magnificent beast again or if he truly had left her for good this time.
Her gaze drifted back to the graveyard around them, filled with fresh corpses and lingering spirits. She sighed once more before pushing herself up onto all fours, readying herself to continue patrolling her territory in search of more unsuspecting males who would stumble across her path and end up becoming part of her pack.
Sometime later (six months) after Cerberus had given birth to Rolzac's pups. Cerberus would be in heat again. As she patrolled her territory. Rolzac would appear. Jumping onto Cerberus's rear and mounting her once more "Favourite mate ready to mate!" He'd bark playfully as he straddled his length against her rear "Rolzac will breed Mate till she full!"
She let out a loud howl as Rolzac took her roughly once more, relishing in the feeling of his massive cock filling her up again. "Rolzac!" she cried out between moans, her back arching off the ground as he pounded into her. Her eyes rolled back in her head and her mouth gaped open as wave after wave of pleasure washed over her. "Mmm... I belong to you..." she managed to choke out before being taken over by another orgasmic spasm, her body trembling with need and desire.
After several hours of mating. Rolzac would once more finish on the tenth orgasm. Making sure all his seed and gone into Cerberus before pulling out. He'd then lick her cheek and say "Cerberus good mate, Very good. She be with Pups again soon. How are current pups?" He'd ask as he licked
"They are... growing well," she panted, still catching her breath as Rolzac licked her clean of their combined seed. "Two males and three females so far..." Her tail wagged lazily behind her as she thought about them. Cerberus was fiercely protective of her pups, always making sure they had food and shelter no matter what it took. She looked up at Rolzac with adoration in her eyes, grateful for everything he'd done for her and their young. "Will I... will I get to see you again?" she asked softly, hopeful that he would return when the time came once more.
"When mate is in Heat" He'd bark as he pulled away from Cerberus "Rolzac go find other females to mate. Cerberus still favourite!" He'd then head off, leaving Cerberus once more filled with cum and no doubt impregnated by him again.
She watched as he bounded away, her tail drooping slightly at the loss of his presence already. A small whimper escaped her lips before she quickly forced a laugh, trying to pretend that it didn't affect her so much. "I am Cerberus," she told herself sternly. "I do not need him." But deep down inside, she knew that wasn't entirely true. Rolzac was different; he made her feel special in ways no other male ever had before.
With a heavy sigh, she turned back towards the graveyard, ready to return to caring for their young and patrolling her territory once more, hoping against hope that one day he would truly make her his forever.
The process would repeat itself. Six months would pass and Cerberus would give birth to Rolzac's pups. Then when she was in heat. Rolzac would ambush her and mate with her till she was filled with his seed, then leave. Rinse and repeat every six months
As the years went by, their ritual continued. Each time Cerberus gave birth to a new litter of pups, she would eagerly await Rolzac's return when her heat cycle started once more. In between, she raised them with fierce protectiveness, teaching them all about survival in the harsh world they inhabited and instilling within them the values that made a good Hellhound. But when he came back for her... well, it was like nothing else mattered at that moment. His rough mating drove away any sense of self-doubt or loneliness she might have felt during their brief separations, leaving only a sense of fulfillment and contentment in its wake.
Her life had become centered around Rolzac; her every thought and action was geared towards pleasing him and ensuring that he would always come back to claim his place as both her mate and the leader of their pack. Even when she didn't know where he went during those long intervals, some small part of her believed that it was meant to be this way...that they were destined to find each other again and again through eternity itself.