Selective Breeding, #2 [ER]

Story by Mantrid_Brizon on SoFurry

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#22 of Series: The AdvAnTAGE Project

Selective Breeding 2 [ER]: Still deep inside of Red Base, the scientists conduct another experiment. What will happen if AdvAnimal males mate with human women, and how willing are they to use a woman who's already been claimed? Ms. Edmond, who had become so curious while watching the previous experiment, volunteers herself... For science!


Author's Notes...

1) DISCLAIMER: This is as filthy an erotic episode as I've written in quite a while, but I'm hetero and fairly vanilla, so... YMMV.

2) This episode takes place before Harriet's Birthday Present [MoW] and plot-relevant Episode 14, but I simply didn't write it in order. Most of the Selective Breeding episodes, and there are a handful I'm considering writing, will be ahead of Episode 14.

More Notes: This series, influenced by The X-Files, will follow a similar format. Some episodes will advance the plot, some won't, and some will even be erotic in nature, once the story reaches that point. Episodes with prefixed numbers and a tile, (02: Title), advance the plot. Episodes without a numbered prefix but a title and suffix of [MoW] (Title [MoW]) are 'Monster of the Week' episodes and may feature cameos by main characters, or may not. They will NOT be erotic in nature. Episodes without a numbered prefix but a title and suffix of [ER] (Title [ER]) are 'Monster of the Week' episodes that are meant to be erotic in nature, when the first batches of AdvAnimals are adults, and ready to enter the general populace. :3

World lore site: https://www.worldanvil.com/w/advantage-mantridbrizon


The AdvAnTAGE Project: Selective Breeding #2 [ER]

By Mantrid Brizon

(03/08/2021)

Gripping tightly to his form, their bodies radiate heat. Looming over her, on his forearms and knees, her lover drives his manhood into her quivering loins, stretching her vaginal canal with his girthy, seven-inch-long penis. Plop. Plop. Plop. Plop.

"Nngf! Nngf! Ahh-yeah! Oh, baby! Mmmm-harder!"

Her hands caress the athletic body of her lover, who hears her impassioned pleas and happily obliges. His fur, damp and matted from their combined sweat, emits a potent musk, and yet for as pungent as it is, it's a remarkably sweet smell. In point of fact, it drives her crazy. Her manicured fingernails rake through the dense, brown forest of his fur, before she grips his buttocks and squeezes. He rocks his hips, grunting and growling. The bed shakes with each powerful thrust, his full, furry balls smacking against the sweaty flesh of her tight yet plump ass. Thwap! Thwap! Thwap!

"Nngf! Nngf! That's it! Nngf! Just like that! Mmm-yeah! Fuck me just like, hhff-hhff, you would've fucked Anna! Ahh-fuck! Deeper! Harder! Ahh-god!" She squeals.

The bed squeaks and the headboard thumps against the wall, his grunting growing louder. She knows what's coming, and she cannot hold out, either. Looking up at her lover, he plants the most passionate of kisses on her lips. Their tongues entwine.

"Oh, Stefan!" She cries out as his lips attend to her neck. "You're so good at this, baby!"

With harder and firmer thrusts, he drives his member into her quivering pussy, which convulses as her pleasure builds. She didn't think he'd bring her to the precipice so fast, but with her third orgasm right around the corner, she almost begs for a reprieve.

"Nngf-nngf! Ahh-fuck! Cum in me, baby! Ahh-yeah! Mmmm-let it out! Ahh! Make me your whore! Hhff-hhff!"

"Rrr! Rrr! Rrr! HnnnnNNNNNNGGG!" He grunts and winces.

"AAAHHHHH!!!" She screams, her eyes growing wide.

With a hard thrust, he sheaths his manhood inside of her, pushing himself balls-deep into her tight hole. Her full, DD-cup breasts jiggle as her back arches, her gray eyes growing wide. The floodgates open, and Stefan fills her fertile loins with his seed. Hot, thick and gooey semen bombards her cervix and invades her uterus. Like a life-giving lava flow, it melts all of the tension built up inside of her, and Ms. Edmond convulses through the most powerful orgasm of her entire life.

Though a relatively inexperienced woman, the twenty-five-year-old secretary to Dr. Briggs masturbates often, and has a fondness for large dildos and vibrators. Even these potent toys are no match for Stefan, who gives her little thrusts as he fills her womanhood with his seed. It's both adorable and amusing, watching the rabbit AdvAnimal trying to go even deeper as he pumps his spunk into her hungry loins. Her nether lips happily swallow every last drop.

"Hhff! Hhff! Rrrr-mmmm..." Stefan groans, opening his big, teal eyes and gazing down at his human lover.

"Ahh! Ahh! Mmmm... Ooohhhh-fuck, baby." She strokes the damp fur of his back. "That was amazing! You really claimed that pussy!"

He smiles from cheek to cheek, then steals a kiss. With their passion slowly easing and the pleasure overloading their minds and bodies, it's perfectly understandable that the exhaustion would overwhelm them. Looking down, past her large breasts, Ms. Edmond flashes a wide grin as Stefan slowly pulls his very thick, human-like penis from her thoroughly used pussy.

"Mmmm-yeah!" She coos, watching the show.

With a little popping sound, the bulbous head of his fat, uncircumcised cock slips out, leaving a gaping, cum-filled hole where her once pristine, smoothly waxed vagina was. Flopping down onto the bed, Stefan pulls her close and snuggles with her, his eyes closed and a little smile on his face as he slips his arms around her slender frame. She wasn't expecting him to be so sweet, but his affection is welcomed. After all, he's merely the first in this little experiment. With their carnal passion complete, the timer resets and she is allowed a few hours to nap and recover.

Awakening to an alarm, she blinks and looks around the room, then gazes down at her magnificent body. Covered in dried sweat and strands of milk chocolate colored fur, which are nearly glued to her skin, her tight pussy is still recovering from her lover's girthy member. His thick wads of cum, which she'd felt sticking to her uterine walls, have yet to seep out. She takes a perverse pride in this, quite happy to hold his sperm for him.

Looking over to her lover, the AdvAnimal man, a perfect blend between human and animal, stretches as he opens his eyes. The bunny man sits up in bed and looks around the room, noting the alarm. The sealed, bulkhead door opens and two men in tactical gear and wearing respirators enter the room. One holds his cattle prod, the electricity jumping between the prongs in a show of force. The other motions to the AdvAnimal, ignoring the nude, human woman who lay with spread legs directly beside him. Stefan doesn't disobey, though he appears disappointed.

He climbs out of bed, his manhood swaying between his legs as he walks on his large, paw-like feet. The men rest their gloved hands on his arms, leading him away and back to his cell. Sighing as she stretches out, Ms. Edmond twists her body, glancing at the intercom built into the nightstand. A bit of static and then a voice comes through the speaker.

"So, Subject-22045, 'Stefan'... How was he?" Steve's voice asks very matter-of-factly.

"Remarkable, and highly motivated." Ms. Edmond says with a delighted sigh.

"Noted. Semen?"

"Mmmm... Copious and in the right place. No hesitation. It felt like he was breeding me." She replies, her cheeks flushing.

"Noted."

"H-hey, how long was that session? I didn't look at the clock before we rested." She asks.

"Just over thirty-five minutes."

"Really?! Are you sure?!"

"Positive." Steve replies.

"But it felt so fast!"

"Right... Well, time is relative, remember? So... Are you ready?"

"Alright... Send in the next one." She speaks sweetly to the intercom.

"Subject-101661, 'Kaiden'. Base species: Wolf." Steve's voice casually replies.

"Sounds good." She coos.

With precious minutes to spare, the reinvigorated Ms. Edmond opens a drawer and uses special, scented wipes to clean off her body. The bedsheets, however, remain untouched. This experiment demands she lay in the sweat of each consecutive lover, to see how they'll react to the sexually receptive mate of another male. She nibbles on her bottom lip and taps her fingertips against her flat belly, eagerly awaiting the next subject.

Soon, the same door opens and men in identical suits, possibly the same guards who removed Stefan, bring in the next subject. Standing five-feet and eight-inches tall, Kaiden has a similarly athletic frame, though his arms, for some reason, are not quite as muscular as Stefan's. His thighs are also less toned, giving him a sleeker appearance. His fur, thicker and more coarse looking, is a bi-color black, with silver covering his front, from his snout, over his neck and right down to his inner thighs. This is very unlike Stefan, whose milk chocolate colored fur covers his entire form.

She finds herself gazing upon his manhood, his light pink, canine penis, which hangs between his legs, and his tight scrotum, which is covered in silver fur. Kaiden sniffs the air, smelling the sex. It still lingers from her time with Stefan. Though he seems perplexed, he loses focus when his big, gray eyes land on Ms. Edmond's beauty. He stares with wide eyes and a gaping maw at the alabaster goddess with medium-brown, shoulder length hair. The Caucasian woman holds out a dainty hand and motions to him with her fingers, seductively spreading a leg and revealing her pussy to him.

"Have fun, stud." One of the guards chuckles, before stepping out of the room.

With the guard's words and Ms. Edmond's gestures, Kaiden is positive that this will be his favorite test. He closes his mouth but smiles wide. She's taken aback by how innocent the wolf looks, his bushy tail, black with a silver tip, even wagging behind him like a happy dog.

"Come here, baby... I want to taste you." She coos.

His manhood responds, growing longer and more full with each beat of his heart. The AdvAnimal follows her directions to the letter, climbing up onto the bed and crawling on his knees toward her. The still damp sheets don't seem to bother him as he brings his masculine organ up to her face.

"Ooohhh... It's got such a nice shape!" She gushes, lifting his gradually stiffening penis and examining it. "So exotic! I bet it's going to feel so good, shoved all the way in my little pussy."

His eyes grow wide at her words. Ms. Edmond looks up at him with innocent eyes, leaning in and licking the pointy tip of his light pink penis. Kaiden's smile widens, his elation hard to conceal as the gorgeous human slowly and methodically wraps her lips around his penis. She attends to his manhood as though she were his slave. Her head bobs forward and back, saliva coating his phallus as she slurps on his cock. A hand cups and fondles his furry balls, and Kaiden finds himself petting her head, running his claws through her wavy, brown hair.

"Slrrp-slrrp-slrrp! Mmmm-yeah... Oh, you taste so good!" She coos, nuzzling his penis with her nose. "Mmmm-you're making me so wet, baby."

Kaiden doesn't doubt her. In fact, he can smell her pussy juice and feels her body growing warmer. His hand gropes her large tits, fondling the perfect orbs that crown her chest. She drags her tongue along the shaft of his canine-like penis, until Ms. Edmond reaches his testicles. She'd rather not lick his fur, but the scent of his musk is so potent, so alluring. Burying her nose into his scrotum, she sniffs his balls, to Kaiden's amusement.

"MMMM-Yeah! Oh, god, baby!" She quite violently shoves herself back, lying flat and spreading her legs. "I can't wait anymore! Give it to me! Claim me!"

Kaiden obliges. He crawls around her legs and takes his rightful place, directly between them. Flattening out, he looms over her, just as Stefan had done. To her silent disappointment, however, Kaiden doesn't bother to lick and kiss her pussy the way Stefan so eagerly did. The wolf goes in for the kill.

"Come on, baby. Claim my little pussy for yourself. Show me that natural selection." She coos, wrapping her arms around his neck.

Spreading her legs even wider, he lifts them up so that he has an almost perfectly horizontal path of travel. She bites her bottom lip and groans, feeling the pointy head of his wolf cock teasing her nether lips, pushing them apart as he moves his penis up and down.

"Mmmm... Taking your sweet time wol-AHH!!!"

She squeals as he suddenly rams his manhood into her dripping wet pussy. With one firm thrust, he jams his cock deep inside of her, his manhood both longer and thicker than Stefan's. Ms. Edmond's loins are swiftly stretched by her new, more assertive lover.

"RRRRR!!!"

Kaiden winces, baring his teeth as he feels the scorching heat of Ms. Edmond's tight, human pussy clamping down on his fat, pink cock like a velvety vice. He pants and trembles, already succumbing to the power of her womanhood. She cannot help but smile as she watches him. Ms. Edmond had always known she was a bombshell, but to see how men crumble from merely feeling her pussy enveloping them is quite the self-esteem booster. As he gathers his bearings, Kaiden plants his hands onto the bed, his forearms just above her hips.

"NNGH!" He grunts as he thrusts.

"Ahh!" She cries out, her body rocking and big tits jiggling.

"NNGH... NNGH... NNGH... NNGH. NNGH. NNGH! NNGH!" He slowly picks up the pace.

"Ahh! Ahh! Ohh-fuck! Nnff-nnff-hah-ahh!"

In short order, the wolf man has driven all eight-inches of his girthy and exotically shaped cock into her tight pussy. It's nothing like Stefan's, whose penis was very human in both form and function, though noticeably bigger than the average. Ms. Edmond struggles to decide which cock she likes best. She can feel the pointy tip caressing her cervix, but Kaiden doesn't strike it with force, causing her pain. Instead, with every thrust he rocks his hips, dragging the pointy tip of his dick over her cervix like a finely tipped paintbrush. The pleasure is already indescribable as her lover shifts his position.

He bends his left arm at the elbow, pushing his chest against her ample breasts and smooshing her plump mounds between their bodies. His right arm lifts up one of her legs, keeping it curled up and running along his waist. She responds by lifting her other leg for him. His clawed hand then grabs onto her perfect ass, giving her a squeeze before his fingers slither toward her anus. What is Kaiden doing?! She looks with fluttering eyes, struggling to keep them open as she endures untold pleasure. His fingers brush her anus as he feels around. His smile widens and she finally understands.

Kaiden's fingers caress the stretched hole that is her pussy. He wants to feel the damage that he's doing to her loins, to know how full his thick dick is making her. It boosts his ego, and as he thrusts his rock-hard cock into her quivering pussy, he rubs her nether lips with his fingertips. The pleasure is overwhelming, and Ms. Edmond soon squeals through her first orgasm, with Kaiden. Empowered by her cries, he slides his left hand downward, placing it on her other ass cheek. He supports himself by his knees, knuckles and his chin, which rests just over one of her shoulders.

He thrusts with a firmness that Stefan didn't have. Kaiden is more primitive, more primal. He isn't making love to her, like Stefan was; this is simply fucking.

"NNGH! NNGH! NNGH!" Kaiden grunts, ramming his cock home.

"AHH! AHH-YEAH! MMMM-FUUUCK!"

Suddenly, she feels a swelling. Something at the base of his penis begins to grow even larger. Kaiden has a knot?! The bulbous mass of pink flesh bombards her loins, obliterating her little pussy as he continues to violently yank out and ram in his penis. Over and over, the AdvAnimal is ceaseless in his quest for pleasure. By way of her lover's carnal nature, she's forced to adapt to his knot, which initially startles and even terrifies her. Soon, however, she finds herself melting.

The shape of his manhood is so unique, so foreign, and so amazing. Her eyes roll back in her head, her eyelids fluttering. With his claws digging into her buttocks, Kaiden rams himself home. Schlop! Schlop! Schlop! His knot stretches her nether lips, allowing the sounds of her dripping wet flesh to emanate throughout the entire room, making her cheeks flush. This is exactly how she likes it. Her body trembles and soon, Ms. Edmond feels another rush. Oh, how wonderful this brute is!

"AHH-AHH-NNGF-HHFF-HHFF!" She pants and claws at his back like a wild animal.

"RRR! RRR! HHNG!" He grunts as he thrusts.

"NNGF! NNGF! AHH-YEAH! AHH-FUCK!"

"RRRRRR!!! HHHNNNNNNNNGGGGHHH!!!"

Her eyes bulge, nearly popping out of her head as she screams, overwhelmed by the sensation. He's cumming! Jet after powerful jet blasts into her pussy. Thick, gooey, and as hot as magma, the AdvAnimal's potent seed fills her nearly to overflowing. The pointy tip of his long and thick cock appears to serve a purpose; it presses gently against her cervix, as if holding open the door for his semen, which so eagerly rushes inside.

Though her uterine walls are already thoroughly tainted with the seed of her first lover, Stefan, the rabbit, she takes a perverse joy in imagining the two males' sperm cells doing battle over who will claim her womb. As her pleasure subsides, however, she glances at the clock and whimpers. He only lasted five minutes! Stefan gave her a passionate and downright romantic thirty-five minutes. However, before she realizes what's happening, Kaiden wraps his arms around her body and pulls.

"Ahh!" She cries out, this time from being startled. "W-what are you doing, baby?!"

Lifting her up, Kaiden looks into her eyes, his lips curling on one side of his canine snout as he flashes a confident smirk. The wolf's tail moves to the side and he plops down onto his butt, taking Ms. Edmond with him. Her lover makes her sit atop his lap, her dainty hands resting on his broad shoulders. He steals a kiss as his hands once again make their way down to her buttocks. Squeezing her plump yet taut flesh, Kaiden's biceps flex as he lifts her up. Ms. Edmond can hardly believe it. He just came inside of her less than a minute ago, and he still wants to keep going?!

She does her best to obey, following the silent instructions of her lover, who guides her with his hands. Up and down, she bounces atop his cock. Plop, plop, plop. His knot, having thoroughly stretched her nether lips, slips in and out of her as if she was form-fitted to accept his exotic penis. Gobs of semen seep from her pussy as she rides her lover, careening down his girthy shaft and dripping from his knot, onto the silver fur of his balls.

Ms. Edmond cannot help but wonder if he's doing this on purpose. He must know that she's already mated. The room reeked of sex, and even her human nose, not nearly as powerful as Kaiden's, could detect the pungent aroma. Does he know she's full of Stefan's cum? Is he hoping to make it spill from her loins, improving his chances at breeding her? She cannot be certain of that; he may simply want more sex.

The twisted thought flips a switch in her brain. If that is what he wants, not only is he strong but also clever! The primal beast within her begins to see the wolf as the stronger, more worthy mate, a man truly deserving of ownership over her loins. She bites her bottom lip and eagerly bounces, gladly helping her new lover expel Stefan's seed.

"Ahh-yeah! Get it out, baby. Hhff-hhff! Get it all out of me. Nngf! Get that bunny's, nngf, dirty cum, nngf-nngf, out of your girl's, nngf, little pussy. Mmm-yeah. It's not good enough, nngf-ngff, for your girl." She coos, her arms wrapped around his neck as she kisses his cheek.

Kaiden turns his head and furls his brow. He's startled not only by her words, but by the manner in which the human woman devolves into a primitive beast. Perhaps that's just the way she likes it, and who is he to deny her? Ms. Edmond squeals as Kaiden suddenly leans over, dropping her atop the bed. Pulling his manhood from her loins and grabbing hold of her ankles, he lifts her legs high into the air and then rolls her over.

Though her body is weakened from her pleasure, she obeys Kaiden to the best of her ability, exactly the way she's meant to. Using the nearby pillows, he rolls her onto her belly and stuffs the pillows beneath her. Spreading her legs and bending her knees, Kaiden makes her ready for an even more carnal position. Kneeling behind her, he holds her hips and squeezes tightly.

"NNGF!" She jolts and winces as he rams his cock back into her pussy. "Nnff-nnff! Ahh-yeah!"

In and out, over and over, Kaiden sways his hips. He thrusts again and again, leaving only the tip inside of her as he uses most of his bulky manhood to pleasure her. She winces and drops her head forward, her shoulder blades contorting as she struggles to stay upright.

"Ahh! Oh, fuck! You're so, nngf, fucking good at this!" She cries out.

Schlop, schlop, schlop! He gives her ass a smack, then squeezes her cheeks and draws her backward, his claws digging into her flesh. She pants and moans, her eyes rolling back as the pleasure builds. He treats her as though she was little more than an animal, his living and breathing cum depository. Ms. Edmond feels herself becoming Kaiden's private whore, and she loves it. However, this isn't the purpose of her experiment.

He tests her resolve, however, when he leans over, grabs onto her shoulders, and rams his member into her pussy with the ferocity of a wild animal. The force of his thrusts is so great, and her pleasure so overwhelming, that Ms. Edmond's legs surrender to him. Her knees buckle and her legs become limp, her body sliding further and further down. Like a hammer to a nail, Kaiden quite literally pounds Ms. Edmond flat, until her belly rests atop the pillows and her face is buried in the sweat drenched bedsheets, which she can barely squeeze with her weakened fingers.

"Ahh-ahh-nnff-ahh!" She moans into the soaking wet sheets.

In short order, Kaiden pulls a third orgasm from her, but he still keeps going. His second climax takes far longer, and just as she feels her fourth orgasm approaching, Kaiden begins to grunt and snarl with much more force. He rams his manhood into her a little harder each time, and slows his pace. Soon, he's thrusting so forcefully that she slides a millimeter or two away from him, while leaving his penis inside of her for a half-a-second each time. Looming over her, he plants his palms onto the bed, his forearms just over her shoulders and keeping her from sliding away.

"Ahh! Ahh! Ahh! Oh-fuck!" She squeals.

"Rrr! Rrr! RRRR... NNNN! HHNNNNNGGGG!"

"Oh, god! I feel it! Cum in me, baby! Ahh-fuck! Fill me up!"

Just as before, Kaiden winces and drives himself home, completely sheathing his manhood inside of her as he gives her a second helping of his cum. To her surprise, it's nearly as voluminous as the first, though it feels a little thinner, more watery. Splashing past her cervix, it flows into her uterus, coating her insides with his potent semen. Is there any of Stefan's cum left inside of her or has her beloved wolf drained it all from her loins, replacing it with his seed? That perverse and carnal thought is as much responsible for her final orgasm as feeling his girthy penis cumming inside of her for a second time.

She convulses, her pussy tightening as she shakes, crushing her lover's thick cock. Trembling before the goddess of a woman, Kaiden pushes against her as he empties his balls into her thoroughly used but incredibly tight love tunnel. As he relaxes, Kaiden lowers himself and spoons with Ms. Edmond, leaving his big, rock-hard wolf cock stuffed deeply into her loins. His knot helps to keep his seed from spilling, a thought that arouses the exhausted and somewhat sore woman even more. They flop onto their sides, and Ms. Edmond soon falls asleep. She simply cannot help herself.

She jolts as she hears the buzzer. Once she's finished with a subject, the team in the control room take a break, giving her two hours to rest. She must have been very tired; from her perspective, she merely blinked her eyes. Sitting up, Kaiden's slimy manhood slithers from her loins, where the tip of it had remained for the entire two hours. The sensation makes her shiver. As before, the guards return and take Kaiden away, leaving Ms. Edmond to clean the sweat, fur, and now the leftover cum from her body. She wipes her inner thighs clean, marveling at the quantity of the pearl streaks that have since turned crusty. The intercom activates.

"Are you alright?" Steve asks.

"Yeah, I'm fine." She says with a heavy sigh. "He was a bit more than I was expecting."

"Interesting. Perhaps another difference between the base species?" Steve theorizes.

"Maybe... His penis was certainly different! Hey, how long did he last, anyway?"

"Altogether? Just shy of twenty minutes." Steve replies.

"Oh... It felt like more." She cutely bites her bottom lip, comparing Kaiden to Stefan.

"Ms. Edmond?"

"Nothing... Okay, send in the last one!"

"Are you sure?"

"I'm sure, Steve. I'm ready for the last one. I can do this... For science!"

"Alright. Sending in Subject-109113, 'Barnabas'."

"Mmm... Good." She coos, stretching out atop the bed.

The slender but busty woman waits patiently, trembling with nervousness as she waits for the final subject to arrive. She'd hand-picked her subjects before this began, choosing them very carefully. Stefan was the largest man she'd had up until the experiment began, with Kaiden's slightly larger and more exotically shaped member being a teaser. Now, however, she must truly prepare herself. For a split second she wonders if she might have bit off more than she can chew. The bulkhead door opens and her gray eyes grow wide, nearly bulging out of her head.

She cutely bites on her bottom lip as she gazes at the exceptionally tall and exceedingly muscular, Barnabas. She'd first seen him when she walked into the control room, watching the first experiment conducted by Dr. Briggs and his team. Barnabas sat with four other males, ignoring the impassioned cries of Anna, a bunny girl, as she surrendered her virgin body to the lone human in the room. Now it's Ms. Edmond's turn to be the bunny. Only the handlers, the human women who brought Anna to the experiment, attracted the males' attention, and if Stefan's and Kaiden's reactions were anything to go by, Ms. Edmond will be doing plenty of moaning soon enough.

The brown-furred horse man's hooves clop on the floor as he steps inside, not needing the guards' direction the way that Stefan and Kaiden did. He sees Ms. Edmond's naked form, one of her slender legs slowly opening as her fingers draw him in. The stallion knows exactly what he wants and his equally gargantuan manhood, which sways like a dead python between his legs, begins to rise for the occasion. With very short and soft, medium-brown fur covering his body like a second skin, his hands, hooves and part of his muzzle have even darker brown fur, like raw cocoa.

She stares at his cock and balls, which are equally dark, her eyes growing even wider as her mouth drops open. His gleaming scrotum is devoid of fur and remarkably big. It grows longer, fatter, and swiftly reveals its exotic shape, like that of a normal horse. His exceptional manhood, about a foot long and extremely thick, throbs with every beat of his heart. He soon stands at the side of the bed, examining her elegant and voluptuous form. Barnabas sniffs the air and sees the tainted sheets, but he doesn't seem to mind.

Opening a drawer in the nightstand, Ms. Edmond retrieves a bottle of soothing lubricant, hoping it will help shoulder the burden of taking in such a magnificently large penis. It takes genuine effort to hide her trembling, a result of her growing nervousness. She cradles the bottle, turning it over as she stares at his manhood. Barnabas leans over and cups one of her perky, DD-cup breasts, softly massaging her flesh. He didn't hesitate or use his eyes to silently ask for permission. It makes her body burn with desire as his masculine dominance. Unable to resist, Ms. Edmond shifts and sticks out a foot, gently bouncing his testicles with her foot and feeling their size.

"Holy shit, stud!" She giggles from shock.

His thick, dark chocolate scrotum spills over her foot, and only one of his massive balls fits, sitting atop all five of her toes. Barnabas grins from cheek to cheek, his large and powerful hand stroking his incredibly thick, twelve-inch-long horse-cock, which is so full and firm that it points diagonally, toward the ceiling.

"I-I need you t-to lube that up for me..." She stammers, almost fearful about having sex with Barnabas.

He obeys, taking the bottle from her hand and smearing a copious amount of lubricant along the top of his shaft. He closes the bottle, sets it aside and begins to rub the lube all over, making sure the gooey substance doesn't drip. As his cock begins to glisten like precious metal, Ms. Edmond feels herself growing wet. It doesn't matter, however, as Barnabas leans over and cups her pussy with his hand. He's so bold!

He pushes the soothing lube into her pussy with a finger as if he owned it, making her body tremble. His finger is so thick, nearly competing with the few men she'd had sex with before this experiment began. Thankfully, Stefan and Kaiden were both substantial, their members being girthy enough to fill the gap between her legs. Barnabas, however, is another story. Just at a glance, she estimates his penis to be at least three-inches in diameter, which is very proportional to his incredible length.

"Okay... W-well. Climb up here and-AHH!"

She shrieks as Barnabas grabs hold of her ankles and yanks. The six-foot and six-inch-tall horse man spins her around and drags her toward the edge of the bed like a doll, before slipping his hands beneath her thighs and lifting. He curls her body, her legs in the air and feet dangling as she's forced to look down, between the feminine mounds of her large breasts. His throbbing cock, so large and so firm, hardly bounces as he spreads his legs and bends his knees.

Leaning far forward, he takes a powerful hand and pushes down on the base of his horsecock. He aims his penis for her thoroughly used pussy, which still contains the semen of her previous lovers. Just as before, he doesn't hesitate, pushing the bulbous head against her nether lips and shoving it in almost immediately. Even Kaiden took longer to penetrate her.

"AHH-NnnnnNNNNN!" She gasps and then whimpers.

She's never felt so full in her life! With a balled fist brought to her face, she bites down on her index finger and trembles. Slowly opening her eyes, they nearly pop out of her head.

"Mmmmm..." Barnabas groans as he pushes in more.

His cock is much bigger than the gap between her legs, about as thick as a can of Coca Cola. It pushes on her vaginal walls, stretching her love tunnel to fit a member she was never built for. Somehow, though, it already brings her so much pleasure. As his penis borrows into her taut pussy, it makes a wet, slimy sound. He pushes out pockets of air, which make a very familiar and unappealing noise as they rush between the tight seal made by his meaty cock. Looking down and smirking. Ms. Edmond flushes from embarrassment. That's never happened before.

Soon, he feeds her eight-inches of his manhood, his medial ring pressing firmly against her nether lips. Pulling back, he moves slowly, making sure that his tiny, human lover, who is more than a foot shorter than him, is adapting to his spectacular size. As he pulls out, he watches the glorious display of masculine power and feminine submission, only to raise his brow. Bits of white ooze are stuck to his manhood. Pulling his penis all of the way out, Ms. Edmond pants for air.

"Holy shit! You're fucking huge!"

Looking down, she is about to ask why he stopped, only to see Barnabas wiping the white gobs from his manhood, which has accumulated just behind the flared rim of the bulbous head of his cock. He looks to her, a proud smile on his face. It's clear to her that he knows what it is. With a hand grabbing the base of his masculine organ, Barnabas pushes it down and drives it right back inside of her. She gasps and jolts, her breasts jiggling violently. He grabs Ms. Edmond by her hips and holds her up as he begins to work, swaying his pelvis back and forth and plowing her with the largest manhood she's ever had and could likely ever take.

In barely two minutes' time, Ms. Edmond shrieks her way through her first orgasm. He brings her over the edge a little faster than Kaiden did. Feeling her pussy feebly crushing his penis, Barnabas shoves her further back onto the bed and finally climbs up. Utterly dwarfed by the muscular stallion AdvAnimal, the human woman can only hold onto him for dear life, squeezing his thick biceps as he rams his manhood into her thoroughly dominated pussy. There's no strength left in her, and even if she hadn't enjoyed Stefan and Kaiden before him, she doubts it would've made a modicum of difference.

He pounds her quivering flesh with a phallus that feels tantamount to taking another woman's fist and forearm inside of her. It reams her loins so thoroughly that she fears she will never be able to enjoy anyone else's manhood again. Barnabas is persistent, and soon he's driven the entirety of his masculine organ into Ms. Edmond's supple, little body. Her eyes roll back as she feels the soft fur of his pelvis warming her ass and thighs. She's taken it all! Barnabas keeps working, rocking and swaying his hips as he thrusts.

His gargantuan testicles slam into her ass like a wrecking ball striking a condemned building. Each thrust forces five or six inches out of twelve into and out of her spasming womanhood. Her pussy tries to move with his rocking pelvis, as if fused to his manhood. His medial ring obliterates her quivering nether lips with every thrust, ripping out of her trembling loins before smashing right back into her. It's a remarkable sensation. She's never felt so full, and soon she's squealing through a second orgasm. She glances at the clock. It's been four minutes. Suddenly, she feels the primal beast. It crawls forth from deep inside of her, taking her over, as it did with Kaiden.

"AHH-YEAH! THAT'S RIGHT, STUD! NNGF-NNGF! YOU'RE SO GOOD! RRRR! FUCK YOUR LITTLE SLUT! AHH-SHIT! SCOOP IT OUT! AHH-AHH! SCOOP OUT THEIR, NNGF-NNGF, INFERIOR CUM WITH YOUR, RRRR-FUCK, BIG, FAT HORSECOCK, NNGF-NNGF, YOU FUCKING STUD!!!"

Losing herself in the carnal passion, Dr. Briggs, Steve and Dave watch the experiment from the control room. Dr. Briggs clears his throat, while Steve takes notes.

"Barnabas is really giving it to her... I hope he doesn't break the bed... Or her!" Dave remarks, his eyes glued to the screen, feeding them footage from the many cameras in the room.

"Yeah... Maybe Ms. Edmond shouldn't be doing this? He could hurt her." Dr. Briggs remarks.

"AHH-YEAH! AHH-FUCK! NNGF-NNGF-AHH! STUFF MY, NNGF-HHFF, LITTLE PUSSY! NNGF-SHIT! STUFF IT FULL OF, NNGF-NNGF, YOUR BIG COCK! MMMM-FUUUCK!" Ms. Edmond's voice bellows from the speakers.

"Oh, I think she can handle herself just fine." Dave retorts.

"Wait a minute... You trying to say... She likes this?!" Steve gasps.

"..." Dave rolls his eyes.

"Oh, my... Perhaps she isn't taking this experiment seriously? Now that I think about it, her hypothesis is sound but her methods are questionable. This may not be a viable experiment at all!" Dr. Briggs shakes his head.

"RRR-RRR-NNGF!" Barnabas grunts and growls as the bed violently thumps from his powerful thrusts.

"AHHH-FUCK! GOD DAMN! HHFF-HHFF! HARDER, STUD! NNGF-NNGF! FUCK ME HARDER!!! AHH-FUCK YES!!!"

"Yeah... That doesn't sound impartial to me." Steve remarks.

With a heavy sigh, Dave shakes his head.