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"You look so good with your lips around my dick, baby."

The dorm room was veiled in a blanket of stillness save only for the Doberman lazed at the edge of his bed and the Haflinger knelt between his legs. In the muted darkness the stallion's head bobbed up and down slowly and methodically as he suck the dog's cock with single-minded determination. As proven by the canine's relaxed, leisurely demeanor, he didn't need any more direction or encouragement as he diligently worked away.

"You always were a pretty pony," the Doberman said with an unmistakable purr, "But you look so much better when you're right where you belong."

A hot blush of embarrassed pride burned across the horse's cheeks as he looked up at the male, never once missing a beat as he continued to suck each inch of the canine's fat member. Even in the dim light, the canine's lewd grin and glinting eyes were as clear as day. He was enjoying, even relishing the power he had over the horse and the control he could wield.

"Yeah, look me in the eyes while you worship my cock," he breathed, pushing his hips forward just an imperceptible touch as if trying to reach deeper into the Haflinger's mouth, "Show me how much you love it."

The dog's expression alone didn't do his domineering attitude justice though. That was best served by any time he opened his mouth to serenade the submissive stallion with whatever line came to his twisted mind. Somehow, he always managed to balance the sweetness and charisma he presented in public with the filth and depravity he saved for behind closed doors.

But then, Beckett's allure of some hidden darkness behind a charming veneer was what drew Santino in, and like a moth to flame the Haflinger had flown all too willingly into the inferno.

"Nice and deep, pony, take your time. I bet you're real excited, but my dick's not going anywhere and neither are you." Beckett snickered aloud as he reached out with one paw to cup the horse's cheek. It was almost tender if not for the male's face swollen from the mouthful of Doberman sliding into him, "And to think you used to say you were some straight dom top. We both knew that was a big fat lie." The cock was pulled free from Santino's maw leaving him free to breathe what felt like the first gasps of air in an age. No longer focused on swallowing down the dog's manhood, he became aware of the ache in his jaw and the chill of drool dribbling down his front. But even then he just wanted Beckett back inside of him, his mouth hanging agape in silent need as the Doberman smeared his slimy length over every inch of the horse's face. "Yeah, look at you, you're gagging for it. You know damn well what you are and what you want." Beckett snorted a wad of spit and shot it into Santino's waiting mouth, "Go on then pony. Tell me. What are you and what d'you want?"

Without any care for how humiliating he must have been in that moment, stark naked on all fours with his own manhood caged and a thick plug nestled in his guts, Santino raced to answer,

"I'm a faggot who wants cock."

With a twist of his wrist, Beckett's cock was slapped against the stallion's face. The weight of it made him wince, the size hitting Santino with a dull, impressive thump.

"Nah, you can do better than that and you know it." The Doberman's grip tightened against the horse's chin as he was forced to look the male dead in the eyes. "Tell me what you are and what you want."

For a moment, Santino wasn't fully sure what response the canine was looking for, but as he stared deep into the man's predatory gaze it began to sink in. He composed himself before trying again,

"I'm your pony faggot and I want your cock, sir."

"That's more like it. Good boy." Beckett pulled his erection back as he began to stroke himself as if he were just idly entertaining himself. Shifting his weight back, the Doberman lifted his legs apart just enough that Santino had already figured out what was to follow before the man spoke again, "Suck out my ass. You might want my cock but you gotta earn it."

Just as he had dutifully throated Beckett's cock over and over again, Santino pushed himself between the Doberman's cheeks without question with his tongue eagerly seeking out its target. As if he'd been starved of food for weeks, he earnestly ate at the dog's hole, working his tongue against and then into the male's ripened rim and letting its taste seep its way into him. From above he heard Beckett growl in lustful approval,

"Yeah, you'll do anything I tell you, won't you pony?" Unable to answer the dog directly, Santino just dug himself further in with his tongue now buried deep inside the man's guts. "Anything just to feel my cock inside you." The stallion moaned softly under his breath, just as his cock strained against the lukewarm plastic of his chastity device and his own ass reflexively tightened around the toy's flared base. Beckett was right, he would do anything the Doberman asked if it meant he could feel whole again with his cock inside of him. After months of being worn down by the man's dominant hold over him, Santino had been well and truly conditioned for that singular purpose.

"I remember those early days when you'd be gagging with the tip barely touching your throat," Beckett reminisced aloud, the only other sounds in the room blended between his paw against his cock and the horse's drooling maw suckling at his hole, "And you'd struggle to stop retching after each lick of my ass. But now look at you," the Doberman let his weight fall back down as he returned his seat at the bed's edge, forcing the horse to pull back from rimming the dog and await further instruction. Santino could feel, taste, and smell how musky and wet his face was, almost as if every sense was now just suffused with Beckett. "You'll suck, slurp, and swallow whatever the fuck I give you, and you'll even thank me for it too."

"Yes sir. Thank you, sir."

Beckett let out a sly snicker as he stared down at his stallion.

"And just like I promised you when you gave yourself to me, I'm gonna make sure you take every inch of my cock. Do you remember, boy?" Santino nodded, but the dog probed for more, "Tell me what I told you."

"You said I was going to be your perfect cock sleeve and take every inch of your cock," the horse recalled each word effortlessly after having spent days, weeks, even months running through them over and over, right down to the last few that hung on his tongue for longer than they should have, "Right down to your knot..."

"That's right, good boy. Every inch of my cock right down to the knot." Beckett's greedy smile didn't once falter as he held the giant slab of dog flesh right in the stallion's line of sight. "And like I told you this morning when we got you plugged for the day, tonight's gonna be the night I make good on that promise." Rising up to stand, the Doberman loomed over the horse, his silhouette blotting out what little light there was and leaving Santino consumed by the man's darkness, "Ain't that right, baby?"

His caged cock throbbed, his plugged hole clenched, and without a second thought Santino answered,

"Yes sir."

Beckett stepped aside to give the horse full view of the bed, and with his cock in one paw and his other held confidently at his hip he gestured for Santino to get up,

"On your back, legs by your shoulders." Obediently, the stallion lifted himself up off the floor, quelling the uncomfortable tremors from kneeling for too long. As he clambered across the bed, the softness of the sheets and mattress beneath him seemed almost heavenly while he maneuvered himself as instructed. It was a position Santino had assumed plenty of times before, but as he pulled his legs back and bent himself in two with his plugged rump presented in the Doberman's direction, it was not the way he had hoped for things to finally happen.

But true to Beckett's pervasive nature, even the horse's most private thoughts seemed impossible to hide from the male, just as the pair locked eyes with the Doberman stood at his rear.

"I know you like it when I fuck you on all fours and yank your mane back like the faggot you are, but tonight's gonna be special baby." Beckett joined the horse atop the bed, kneeling just before his upturned ass as he settled back onto his haunches. "I wanna look into your eyes as you take my knot... just like the faggot you are."

Punctuating his point, Beckett let the full weight of his cock drop down against Santino's hole, the meat of his erection slapping against the smooth silicone that was currently flush with his hole. The Doberman was in fact so well endowed that his girth exceeded even the toy itself now that they were side-by-side, all while his length simultaneously jutted over and eclipsed the horse's chastity cage.

Santino could feel the anticipation building within him as fingers pried at the plug's base for purchase and didn't stop until they had begun to pull the toy free from his unwilling hole. Grunting in quiet discomfort as Beckett tore the plug out of him, he suddenly felt unnaturally empty after having spent a day with a baseball-sized mass occupying his abdomen. That toy alone had already felt huge, it was probably the biggest one he had ever taken so far, but it was virtually half the size if not smaller than Beckett's bloated knot that was closer itself to a softball. He stared down at the two between his legs, the plug momentarily held beside the Doberman's cock, and from that sight alone it seemed objectively impossible that he could ever take Beckett balls deep.

The plug was cast aside and those digits returned to his hole, digging into the soft, stretched flesh of his rim with efforts to pull it even wider than the toy itself. There was still some lube lingering from the toy as the horse had refreshed himself round the clock as needed, but there was still some difficulty in taking the canine's fingers raw. Santino weakly winced, but he didn't protest as he eased himself into letting Beckett chip away at his limits, physical and mental.

"Good boy. You're nice and loose. You're all ready for my knot. Just a few final touches..." Beckett lifted himself up and reached just beyond the stallion to the head of the bed. Wasting no less than a second or two, he returned back to his place at Santino's rear with a pillow in one hand and a bottle of lube in the other. Their purposes were self-explanatory, and so the horse leaned back to allow Beckett to position the pillow under his hips, knowing that he would have the perfect angle of entry now. As for the lube, Beckett pumped an unhealthy amount directly onto his cock as it slid against Santino's exposed hole. The cool liquid spilled over the sides of his shaft and dripped down onto the horse, in turn draining down the gentle gape of his ass and into his innards. The feeling of slickness swilled inside Santino as the lube slowly pooled into him, a sensation that only intensified with the sound of Beckett's paw working a liberal coating across his erection.

Getting himself poised at Santino's ass, Beckett knelt over him with the head of his cock ready like a spear at his rim and once more they locked eyes.

"You ready, baby?" He asked in a rare moment where all the dirty talk and power play was put aside, "Because once I start, I'm not gonna stop until the knot's in. No matter what, okay?"

"Yes sir."

Beckett flashed a beastly grin as the moment passed.

"Good faggot."

Barely able to take a breath and brace himself, Santino felt every fiber of his being tense up as Beckett pivoted himself back before thrusting forward. That leaking cock tip pierced easily through the horse's hole and sunk just as quickly inch by inch into his deepest folds. The sensation was one Santino knew all too well as a feeling of belonging and fullness ran through him from the bottom up. It was far more intense than just the plug alone, and feeling the very weight and force that pushed that flesh into him was a greater gratification. Beckett slid in as far as the stallion could take, reaching a point where the tightness began to set in in spite of all their preparation.

From his perspective, Santino could just about see his straining rim as it enveloped the fat shaft of the Doberman's cock. But it was not Beckett's initial length that didn't concern him, as his eyes traced back to the waiting, taunting knot that swelled almost angrily at its root. With the stretch beginning to hold and the horse now finding himself tested, he felt his nerves flair anew as he realized Beckett was barely half buried in his ass.

The dog's paws took hold of Santino's ankles, using the leverage and weight to his advantage as the horse found himself otherwise immobile. With only his own arms curling around his knees to help with Beckett's efforts, the Doberman sidled back and forth to get his hips in just the right position with half his cock impaled in those guts.

"Remember," Beckett said with stern clearness, "No stopping until the knot's in."

There was nothing else to say as with no further warning the Doberman recoiled his waist. Pulled back and suddenly shoved forward, he fucked the length he had into the horse's ass. Santino let out a guttural groan that shook and fractured as Beckett slammed in and out of his hole. It felt as if he was pulling out right to the very tip only to thrust back in with wild abandon. But with the erratic jostles of the bed shifting beneath them and the speeding flurry of Beckett's cock rolling back and forth into him, it was impossible to tell.

Yet Santino swore he could feel the Doberman digging his way deeper. It was like he was hollowing out his guts, Beckett churning through the lube and flesh with just as much dedication as Santino showed worshiping that same cock now drilling inside him. Looking up at the Doberman's expression he could see the furrows of concentration and resolve etched across his face, as if their sex was about anything else but carnal pleasure. For Beckett, it seemed he was applying himself to finally achieve his exact goal, apparently regardless at this point of whether the stallion wanted that goal or not.

However, while Santino was as keen to overcome the last barrier to his full submission, it was still by no means easygoing. As that hard shaft of male flesh carved its way inside, there was a growing sense of discomfort and pressure that made his skin crawl. Yet somewhere hidden between the two were the sparks of something pleasurable. Santino did his best to cling to those fleeting sensations, breathing with strained pants as he surrendered to the dog's invasion. He was along for the literal ride, sweat beading down his brow as the physical exertion took its toll and the exhaustion started to creep over him.

That was why it was perhaps a reprieve when Beckett's thrusts suddenly drew to a stop, but without the momentum disguising the sensation Santino felt as though he was about to split open. Glancing down at his ass was all he needed to realize why.

Pressed right against his rim was Beckett's throbbing knot. The rest of his cock was nowhere to be seen, buried in the horse's guts with Santino feeling the head sunk somewhere past his second ring and then deeper still. He felt impossibly full, but pinned in place by Beckett's paws at his legs and dick impaled up his rear, the stallion could do nothing but squirm and writhe from it all.

"It's time."

Beckett said nothing else. He didn't need to. But his eyes were fixed on Santino's as he began to fuck the horse once more. The stallion felt compelled to gaze back, even though he shook and shuddered from the force of every thrust into him. It was perhaps just as overwhelming as the cock burrowing through him, as the Doberman's face was a dark, primal sight to behold. Santino felt himself sink away as Beckett took over him, where whatever was left of his former self bled into nothingness. All that was was Santino, obedient and willing, as it pleaded for Beckett to stake claim to the last part of him no other had taken before.

With a loud, feral howl that was joined by a shrill whinny, the Doberman slammed himself against the stallion's ass one final time. There was a sickening slurp of foaming lube as a large mass forced its way into a space it had never been, all while a hole was brutally stretched to a degree that shouldn't be possible. Then, as Beckett's knot slid over its fattest point, the horse's anatomy took over and feverishly swallowed the rest only to then suckle at the very base of the dog's cock.

True to his species, with his knot planted deep inside his mate, Beckett was just a hair trigger from an orgasm as he panted hard. But for Santino, pushed to an all-new limit with his guts stuffed with more cock than he'd ever taken in his life, there was no stopping his climax. Even with the cage keeping him constrained, the horse breathlessly whimpered and tossed from side to side while his dick limply spat jets of cum from the plastic's slit. There was little pleasure in the sensation, just the feeling of mild relief as some inner pressure was released.

Yet in turn, with his hole clenching from each weak spurt of seed, Beckett was likewise pushed over the edge. As his knot swelled to an even larger size and ultimately locked their two bodies together cock to ass, the Doberman snarled as he began to pump his load deep into the horse. Thick ropes of dog cum marked the stallion's guts deeper than they'd ever reached, sealed there by the very knot that caused everything in the first place.

Throughout it all, Beckett had held the stallion's gaze, so that during every moment between Santino's ruined orgasm to the Doberman's triumphant own, the bond between them had been tied in every sense. There was quiet, disturbed only by the pair's haggard breaths, where neither said anything. It was Beckett, however, who took charge as always, and with his cock knotted in the stallion's rear he did his best to lower down onto Santino as gingerly as he could. His muzzle found the stallion's own, their lips meeting in the dark with tongues sinking into one another.

There was no turning back, Santino accepted, as he gave himself to Beckett. Taking his knot would only be the beginning of a longer, deeper road...

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