Samantha stood in the wet grass near the riverbank as she watched the setting sun turn the sky orange. The water slowly crept back up the muddy shore. Unbuttoning her shirt and neatly folding it down on the grass before she moved on to her jeans, then panties. When she had folded up all of her clothes, the nude Samantha looked at the knee-deep water of the river as she approached it. Just before night claimed the day was the best time to find her target, a kelpie. She slowly made her way into the chilly waters as her feet sank in the soft mud.
Samantha found her body responding to the temperature and she could feel the little nub of flesh between her legs become stiffer she slowly became accustomed to the water and the current running through it. She sat down onto the edge of the shore, feeling her sink slightly into the mud, her lower back being just under the water, and as she laid down her feet sank deeper, her thighs following soon after. The sky grew darker as her wait continued until she finally heard the sounds of approaching hoofbeats and rustling waters.
Staring down the length of her naked body Samantha saw a moss colored head and a neck rise out of the river, and the creature rose further out of the water, a neck connecting a horse like head to a more or less horse shaped torso ending in long, powerful legs ending in hooves. As it trotted closer it seemed almost weightless, the hoofed beast not making any noises of sinking into the mucky river. A species known to drown their victims in deep waters before eating them, a fact Samantha was all too well aware of as the beast approached. Samantha pushed herself up with her arms and tilted her head, moving some of her hair from her eyes so she could better watch as it approached, having no fear of drowning in this kelpie's grip.
As Samantha looked up to see it, the kelpie stopped, just barely touching her legs with its snout before looking around as if to find anyone else there, then returning its gaze back down at Samantha. Samantha's fingers gingerly grazed the backside of its face while moving some of her wet, dirty hair out of the way from the sides of her head. It made no reaction, its eyes just staring into hers and her hand eventually came to hold the bottom half of its jaw, the kelpie remaining motionless. A faint smile formed in the corner of her lips before she grabbed at its bottom lip, pulling it out before she released, and the kelpie still did not react.
Her legs spread slightly wider, the cold-water seeping into the warm crevice of her sex and between her buttocks as she kept staring up. Her free arm moved the other half of her long, dark, soaked hair, leaving the entirety of her head exposed as her head tilted. Samantha looked back down, her curse seeming to final sink in drawing the Kelpie into her spell, as her natural pheromones wafted through the air.
It had already shown some degree of aggression, its teeth showing in a sort of grin, and it didn't need any coaxing before its head moved between her legs and she felt her thighs lightly touching it as they rose up to rest against the mane, the mouth suddenly sealing against the lower half of Samantha's belly and her sex. A long tongue extended, its warm, thick flesh moving between her labia and tickling the inside of her belly before it retreated, and she could see the lips close together tightly. Its teeth were sealed safely inside, not a danger to her body before there was suction and it pulled at the skin and flesh trapped it. A shuddering breath escaped from her, the feeling of being inhaled into the kelpie's mouth making her legs shiver before it let go, a small sucking noise being made.
The Kelpie rose up from the water as it towered above her, water dripping down it's green fur onto her, and she reached out to grasp its legs as they parted above her. There she saw the green folds of its genital slit and its cock extending, throbbing in the chill of night as its shaft dropped from within its sheath. Its lower half still in the water she had a front row seat as the shaft throbbed with arousal. She grabbed it and started to rub the head with her thumbs as she fell backwards onto the muddy river shore, spreading her legs as the creature lowered itself onto Samantha's soft skin and slender frame.
Samantha was pushed down into the muck by the great beast. The head of the Kelpies thick cock prodding at her sex as he tried to line himself up with her entrance, his legs shifting on either side of her torso as he found his way. The wide head hit resistance as her lips parted from its weight. His hips began to rock, and Samantha gasped in anticipation. His tip sank before he rose back and then rocked forward. With each thrust his cock sunk in more and Samantha gasped from the pressure of his girth stretching her inner walls, the lips of her sex clinging around the sides of his dick. She could feel the ridged base slowly being exposed to her until, finally, his head bumped against her cervix. A sharp inhale followed, and Samantha arched her back, the air of the swamp being drawn deep within her as her inner walls were forced to stretch and reaccommodate the monster on top of her. Each throb of his prick met with an inward squeeze as her muscles contracted around his firm meat. Samantha let out a guttural grunt that echoed out through the bog.
The Kelpie did not care for his 'mate' as his heavy body rested atop Samantha's slender frame, but each time she moved to adjust he'd snort through its nose, pressuring her to keep still as she'd sink deeper and deeper into the mud, her back and arms now caked with it. His heavy sack dangling below his shaft and between his powerful legs, each testicle being nearly the size of a tennis ball. The first signs of the Kelpies lust dripped onto Samantha's thigh, the warm fluid slowly dripping onto her as his hips moved faster. With her body pressed into the mud she had no way of resisting him as the head of his member forced its way past the soft tissue of her cervix and entered her womb. Samantha shuddered with each thrust, her inner walls desperately trying to contract and slow his penetration. But to no avail as her own biology betrayed her and with the kelpies insistence his head entered her deepest chamber, and his pulsating veins teased her slick canal.
Each time his ridges moved past Samantha's labia they would spread her further, but they had no real barbs, and her insides were not injured in the least. A normal woman would have screamed from agony, but the young woman had prepared for just such a union. No, she did not scream. Only letting out a moan of pure bliss. Each inward thrust of the ridges sending pleasurable spikes through her as his girth spread her lips and her own lubricant seeped from her lips. As he pulled out her own folds clung tightly, squeezing his head, and tugging at the ridges.
She was not a normal woman anymore, and she lived for moments like this. The Kelpies' weight kept her from moving much, the hooved feet not rising up much and his legs and hips were a powerful engine that could pull and push him through her. With his testicles dangling under her, Samantha's slender legs wrapped around his hindquarters, holding herself as steady as possible to take his weight and strength while being careful of the sharp edges of his hooves, not to have him stepping onto her hands that kept her braced. She found her breath quickening from her arousal, the air turning warm with each breath before it chilled and her lungs took more and more of the chilly swamp air.
The Kelpie continued mounting her for some time, not letting her go, not letting her get away as his speed continued and Samantha's wet hair plastered on the muddy bank, his tip and shaft making her womb bulge outward while her skin bulged from the force. He had found his mate for the night, and she was to be his. His pace continued, each time he had thrust his tip into the end of her tunnel it would stretch her open and she could feel his warm pre dribbling inside, her belly already beginning to feel as if something were amassing there. The pace continued and her nails dug into his flesh, and she tried to hold her ground as his size and speed began to push her back, her feet digging up against his hind legs as her ankles kept their hold on him. The water of the swamp lapped against them and Samantha begged the Kelpie to keep going knowing full well neither one was able to understand one another in the traditional sense, and yet she knew what he desired more than anything. Samantha wanted it as well.
The Kelpies powerful thrusts rapidly increased as Samantha's insides twitched around the intruding flesh. Its thick meat spreading and pounding the helpless woman under its mass into the soft earth, slowly making the water creep past her body as she slowly was being fucked underwater. So much power in every thrust as the Kelpies' entire weight was put behind it's mighty rod as her body struggled to accept it. Again, and again its massive head struck the back of her chamber, every time she moaned and squeaked, her inner walls clinging to the mighty shaft while her sex leaked her fluids. In and out as her body continued to try to squeeze it as if to pull it in further while the Kelpies shaft pounded through, its length grinding against her and striking her pleasure centers. She was a moaning mess when his speed finally peaked.
With a great snort and thrust Samantha gasped and moaned out as he thrust deep. The tip kissing her very core. His mighty balls raised, and a massive flood of semen flooded out of him, her womb rapidly expanding under the volume. It took a couple of seconds and a series of twitches from him before the next wave hit and even more spilled into Samantha, the young woman trying to hold her position in vain. As the waves of his seed flowed into her she was unable to keep holding on, the young woman's body finally surrendering as the overflowing mess pumped in at an alarming rate. His tip was fully within her chamber as her entrance began to dribble, his semen leaking out and Samantha's legs could only shiver as she let it fill her. Even with his cock buried as deep as possible it began to leak from around his tip as it could not hold any more and Samantha screamed in pure joy and bliss.
His seed flooded her, and the constant twitching made it all seem endless. Her fingers clawed at his body and her toes clenched and shook as she tried to take it, her screams turning into short breathy moans that sounded in time with each pulse and release of his cum. Finally, Samantha was overwhelmed with her body forced deeper and deeper into the ground. Her womb swelling with his load. She could only lay back, letting his semen make a bulging stomach on the slender woman. Her legs released and she laid on the edge of the water, her lower half was below it as she was held in that position, the cum being stopped from continuing to spill by the pressure he continued to put on her.
"Oooooh..." she sighed deeply as his cum slowly dribbled from her lips around his cock as the kelpie filled her as only a monster could.
Finally, the kelpie ceased its thrusts, as his own body twitched from its climax, it lifted its body and withdrew its thick, hard prick from her cunt. Each ridge stimulating Samantha's oversensitive nerves before finally the thick, bulbous head popped out and a deluge of thick cum began spilling out into the waters. The water of the river splashed over her legs and her pussy was washed in his juices, the warmth of his semen inside and her own juices outside and around her lips and entrance. She could still feel it dribble from within her as she stared out to the side, looking out into the water, and feeling him turn to stare down at her.
His prick had not gone soft at all, he was as erect and potent as ever and the young girl new what came next as turned over onto her stomach she presented her round buttocks as the Kelpie lined up once more, its thick cock head easily penetrating the girl and once again the girl moaned loudly. Its ridges and the tapered head pulled and rubbed against her insides as its entire shaft was inserted. The length of it moving deep inside and hitting against her deepest parts. Each movement of the Kelpie was felt in her core as the water washed against their bodies. And once he was in place, he wasted little time. She was unable to see the Kelpie behind her, but felt it's body and its length moving in her and knew the signs. Samantha gasped, water spattering her body. It rose and fell and her breath quickened, the water moving over the shore, its speed becoming greater, the impacts of its body against hers and her ass being jutted forward becoming harder and quicker each time it did it, the sounds of water flowing more and more obvious while he moved faster and she gasped louder, and the movements and thrusts became quicker as it's front hooves were firmly planted next to each of Samantha's shoulders. It's hot breath on the back of her neck and her moaning being joined by its heavy panting.
Water continued to rush over them, the current moving further over Samantha as she felt the familiar twitching of its meaty prick and her body being shoved further out to the water as he took no heed. He did not need to be gentle. She did not ask for that. Samantha wanted nothing less than to be pushed further and further, the Kelpies speed continued, each movement pushing Samantha forward slightly, her knees sinking slightly into the sand and mud. Even though Samantha was entirely in the water now it did not bother her, it could not bother her. The mud still being moved as more of the riverbank gave out, his tip grinding deep as her walls wrapped tighter and tighter around his girth.
It did not matter, both only wanted to continue as the water covered Samantha up to her chest, its hooves standing upon the riverbed as her face sunk into the wet earth while her mouth remained just above water, the current of water running over it with each thrust. More water splashing down into her face, her hair spreading further apart and she only needed to hold on, to hold herself up and continue to give into the mating frenzy that both had. She knew she was close; Samantha could feel her pleasure welling and she was ready for the orgasm that was so close to her. It was a pleasure she wanted to give herself fully into.
And the Kelpie was getting closer and faster. He was rutting her like a bitch in heat, her sex gripping his cock as his ridges plowed in and out, stimulating Samantha's insides as her lubricant continued to spill out despite the water of the river running around her. Its front legs spread apart as its speed became its greatest and it pushed forward. His movements and speed peaked once more, Samantha moaning in her own orgasm, and her face pressing against the ground as the water ran between it and herself. And then it began as her belly began to bulge again, the tip firmly within her cervix. With no regard for her the beast unleashed its second torrent into Samantha, more of it leaking around its cock while her lips clung around his ridges and cock. It throbbed and twitched; her own orgasmic climax extended as her mind went blank. Pleasure filled her mind while its semen continued to fill her body. More and more until it was spilling from around his cock and his sack finally relaxed.
The kelpie had finally spent every drop he had, and Samantha's belly was a potbelly with the volume of cum, her inner walls clung tight around his dick as he withdrew with an audible pop. Then, after pulling out fully and releasing a last dribble onto Samantha's lower back and buttocks, he moved into the river and waded through the water before disappearing. The blackness of unconsciousness taking her.
Samantha slowly regained her consciousness, and she blinked slowly, her eyes looking into the sky and seeing only darkness, the night was still young. She rose to her knees and shivered as the cum gushed from her body into the murky river, her hand gently rubbing her bloated stomach as it shrunk with the semen being spilled. No matter how much left she knew enough already fulfilled its purpose. Even with the Kelpie gone the proof of their mating would remain within her.