His lips trembled as he opened his mouth, looking up at his master's face as the hot tip of his penis touched his lips. 

He wanted this. 
He actually wanted to do this. 
And try as he might, a small part of him still couldn’t believe it.

When Shadow suggested a new way of dealing with the tension between them, the last thing he expected was being jumped in Station Square and brought to Shadow's training facility at G.U.N. Even less being forced to his knees and made to "relieve" the stress he caused the black hedgehog. The memory had stayed with him, he spent a week thinking of his ordeal, and much to his surprise, he went to Shadow willingly and engaged in much the same activity.
A month later, it had become a regular session. They hadn't done anything else, save introduce elements of Shadow's more, restrictive, passions. Thus Sonic found himself once again on his knees before his rival and master. 

He turned his head, a last feigned defiance, as if he didn't want the hot rod to touch his tongue. He knew that wanted to, needed to, and so Sonic gave no resistance as with one thrust his mouth enveloped the rounded tip of Shadow's penis. 

He began to suck, feeling the pleasure from deep within his stomach as his mouth suckled on the glans, trying to draw out its hidden nectar. Rough hands gripped his head, and Sonic raised his eyes to meet Shadow's, who simply smirked as he began to pull his pet towards his abdomen. More and more of Shadow's cock disappeared down his throat, until he was an inch away from his master's white bush. It was then that a small gagging noise came from inside him, and with strained eyes Sonic looked up again. 

His master's smirk remained, and his gaze didn't shift as he slowly pulled out, removing the head of his cock from his mouth. No sooner had that happened that Sonic began to lick up and down his shaft, his eyelids closing as he focused on his hot, meaty treat. He heard a throaty moan, and he looked up in time to see the sweet - smelling hedgehog look down at him. He wouldn't admit it, but he really did find Shadow hot as fuck, and he wanted to please him, to please him in every possible way. 

Suddenly, darkness filled his field of vision. 
"Wha … what's happening?" he asked, "I can't see!" He could hear a deep chuckle. 
"Just a blindfold, my pet. After all, you don't need to see, you just need the taste of my cock on your tongue, and I know you can take every drop." 

Sonic groaned and twisted his head around, and through the red sash on his eyes saw the silhouette of his master towering above him, cock in hand. Not that there was much else to see. It was clear that GUN was unaware of their escapades, as Shadow had chosen a lockable cupboard inside his own living quarters to be their little dungeon. The metal room wasn’t small, but it was dark, and it was by chance that Shadow stood at just the right angle in front of the light bulb on the ceiling for Sonic to be able to see him through the red sash over his eyes.
His master began to stroke it back and forth, and said in a low, sultry voice 

"Say my name. Properly." 

His voice trembled as he spoke, using the ridiculous name Shadow had ordered he call him. 

"D-daddy Shadow." Sonic could practically hear the smirk in his master's tone. 

"Good boy." 

He drew in a deep breath, inhaling the hedgehog's smell, and then he slipped his lips over his cock. Shadow's musk may have been intoxicating, but his cock was to die for. Veiny and thick, several inches thicker (and longer) than Sonic's own, jet black save for a red stripe on the underside, and a tan head that matched his mouth. Sonic took his time suckling on the glans, occasionally prodding Shadow's slit with his tongue. 

"You're getting better at this." Shadow said, and Shadow didn't lie. Their last few encounters proved that the better Sonic sucked, and the more tenderly he blew, the faster Shadow came. But that wasn't his master's plan today, he wanted Sonic to worship his cock for hours. And when he came, he wanted Sonic to swallow every last drop. 

"You're making me hard." Shadow gasped. "You're going to make a wonderful cock sucker, lucky you like what you're good at. But don’t get complacent, it's not over yet." Shadow growled, slipping out Sonic's mouth and moving towards a bench that was placed against the wall. On the bench was a collection of naughty toys and accessories, as well as some items that would be useful for aftercare later, but on this occasion his prop was fare more mundane. After a few minutes he returned, his cock slowly re-entering Sonic's mouth. His hands went to Sonic's, and Shadow quickly bound them with a length of rope while gently bucking into his pet's mouth. 
Once the knots were tight enough for Sonic to give the slightest yelp, Shadow moved away, leaving Sonic in a mild sensory deprivation, which made the tight grip of his master’s fingers on his own cock even more shocking.
“What are you doing Sha-,” he cringed slightly, “Daddy Shadow?” all he got was a dark chuckle.
“Just kicking things up a notch, my pet, based on previous experience.” Suddenly, a cold feeling brushed his slit, and then he felt an intense burning, centred in his dick, but travelling in waves through his body,  causing him to writhe under his master’s hold. Through the blindfold, the faint outline confirmed what he felt, Shadow had inserted a sleek metal bar into his urethra, and he could make out the sadistic smile on Shadow’s face as he slowly pushed down on the sound, penetrating Sonic in perhaps the most dominating way he could. The feeling was completely alien, but as the sound stretch his dick open and reached towards his balls, it was honestly amazing. Once only about a third of an inch was left outside, Sonic felt a slight pinch right of his slit. He couldn’t make it out, but Shadow had screwed on a metal ball to the sound, completely blocking his pet’s penis.
“Just a precaution to make sure you don’t end the fun to soon, Mr Fastest Thing Alive.” A blush spread on Sonic’s face, well aware that Shadow was not referring to running.
"On your back." Shadow commanded as he fell forward, taking Sonic with him, which gave him no time to get used to the way his dick felt wrapped around the sound. Sonic could do little else, as Shadow’s falling weight took him down too, falling to the floor, his head between his master's legs. Shadow meanwhile caught himself on his hands, and was now further up than Sonic, his raging hard on level with his pet’s head, and in fact the thick shaft was smearing a mix of dick sweat and spit on Sonic’s face. He pulled back, lifting his cock off of Sonic, letting it hang above him. He knew Sonic couldn’t see him, but if his blue bitch had learnt anything, he knew what to do next without a word. And sure enough, once the cock lifted from his face, Sonic opened his mouth to form an ‘o’, eager to take his rock hard member. In a way Sonic really was a pet, like a dog he knew his tricks so well his master need say no word. Sonic didn’t need to be told to suck Shadow’s dick, he knew to become it was there.
As his manhood passed back through those lips, he watched as those big blue eyelids flew closed, and the lightest moan came from his throat. Of all of Shadow’s victories, turning the loudest, cockiest hedgehog on Mobius into his own personal cum dump had to be up there. The said blue blur shivered a little at the feeling of his owner's cock head back inside his mouth, slowly working it's way down as Sonic took the cock deeper into his throat with each thrust. 

After several thrusts, Shadow picked up the pace, forcing Sonic to deepthroat his member. It was overwhelming, and so Sonic tried to focus on breathing, a task that was easier said than done with Shadow's big cock in his mouth. Shadow's pace quickened yet again, slamming into Sonic's throat, occasionally pulling out to the ridge of the head, but always returning until all Sonic could smell was the musk of Shadow’s thick, white pubic bush. 

Shadow chuckled as he heard Sonic choke every so often, and took the chance to humiliate the hedgehog by staying ball deeps and grinding his crotch on his face, smearing it with sweat before slamming his member in and out of Sonic's mouth again. The blue blur gagged more and more as Shadow impaled him, but Shadow didn't care, as long as he took his time fucking Sonic's mouth and ensured he didn’t actually suffocate, he could do anything he wanted with his blue pet.

"This is...a long time coming." Shadow moaned, his breathing quickening as he neared his climax. 

Shadow's blue bitch started to choke heavily, his hands still bound behind his back and his mouth still stuffed with Shadow's cock, and he let out a gargled moan. Upon hearing this Shadow, ever the sadist, gave Sonic's balls a few good kicks whilst indulging in his pet's muffled whines. He had noticed the little boner Sonic had when one of their fights ended in a swift kick to the groin, and the fact such an emasculating thing turned Sonic on was very amusing. Shadow groaned as Sonic's throat tightened around his shaft, sending waves of pleasure through the ebony dom. With another thrust he exclaimed 

"Glad I found a good use for your mouth, you've no idea how long I've wanted to shut you up with a massive cock!" 

He laughed, thinking back to all the times he'd daydreamt of facefucking the blue annoyance when he wouldn't stop talking. A thousand times in his mind he had cornered Sonic in some alleyway, sent him to his knees with a good kick, skullfucked the attitude out of him, and made him take an ultimate protein shake off the tap. Shadow's thrusts seemed to get ever faster as his orgasm drew near, spurred on by his mental images and the fact he’d made them real almost a dozen times. Sonic was overwhelmed, his own dick twitching like mad while he remained tense from Shadow's harsh treatment. 

But the main thought on his mind was the thick cock that was cutting off his air and turning his mouth into a fleshlight. He could feel it almost vibrate against his tongue, meaning a flood of warm seed would soon be on the way. His balls ached in pain and anticipation, but the thick sound, stretched his urethra and dashed any hope of orgasm. 

Speaking of, Shadow began to quiver as his orgasm neared, a white flood down Sonic's throat close at hand. His pants grew heavier, and, then with a final thrust, cried out, making a noise between a moan, a scream, and a cry one might make when in pain.
Shadow then came, a stream of cum pouring down Sonic’s throat, slopping over the sides of his mouth and dribbling down his neck. He could barely breath, and he began to feel the burn of hot cum in his nostrils. 

Shadow smirked as his seed bloated his blue bitch's cheeks, no thanks to him still being balls deep in his mouth. 

"Better swallow before you drown!" Shadow ordered whilst slowly pulling his cock from Sonic's mouth. He then raised Sonic's head slightly as he gulped, to make sure he was finished, then let go, and Sonic coughed and began to breathe. 

Shadow pushed himself off and presented his cum covered dick, his expression neutral. 

"Clean." He said. 

Sonic slowly leaned forward and began to lick up his master's spunk. Shadow watched amused as Sonic worked his tongue up and down, tasting the salty, tangy cum on his tongue, the taste more clear than in one big gulp. 

Whilst Sonic slurped up and down the surprisingly still fully erect dick, Shadow reached behind him and grabbed a pair of scissors and a cool, damp flannel. Once the shaft was clean, Sonic finished the job by squeezing the head slightly with his lips and swallowed the last little dribble of cum. Once done, Shadow got up and cut the bounds on Sonic's wrists, and proceeded to wrap them in the flannel. 

"Hold them in that and they shouldn't hurt much longer." Shadow said. Sonic obeyed, and Shadow stood turned back to the bench. He turned on the lamp and approached a plate of chilidogs and then placed them in front of Sonic. 

"You've had more than enough protein tonight, but I'm sure you'll love these. After all, I'm a responsible pet owner." Sonic, now sure they were out of character, began to eat, and dared to quip. 

"If you were you'd give your pet a reach around, or maybe even have a taste of his dick." To this, Shadow replied, 

"I'm afraid it's only you who can't resist the taste of good cock." Shadow smiled teasingly, a smile that Sonic matched.
“And a responsible pet owner doesn’t kick his pet in the nuts,” Sonic looked downward and lowered his voice,  “no matter how much he enjoys it.” A slightly cruel look crossed the ebony hedgehogs face.
“You’re right, responsible pet owners get their pets neutered. But in this case, I guess you've earned a little orgasm." 

Once the chillidogs were gone, Shadow leaned over, pulled the sound out, and proceeded to place his hands under his balls and began to massage Sonic's scrotum. 

Sonic let out a moan as Shadow kept managing with one hand, and began to jack him off with the other. 

"What are you doing to me?" Sonic moaned, his voice much higher and more feminine than usual. 

Before these sessions, Sonic had always assumed he was quite vanilla, though in fairness defeating Dr Robotnik gave little time for sexual escapades to test this. But now, with his muzzle still stained with cum and Shadow's vice like grip on his cock, he was quite sure that it was the stripping of his heroic status that submission gave that turned him on. No Robotnik, no people to save, no overwhelming expectations. All he need do was obey, the jizz on his face and in his stomach the only rank he need get. So simple, so freeing. 

Sonic's face began to contort, pure bliss finally igniting in him. 

"Oh please Shadow, let me cum!" Sonic begged. 

"Wh-when I'm with y-you, I've never cum so hard in my life!" Shadow stroked his cock tightly, not breaking his rhythm as he watched Sonic trying to orgasm, which seemed to amuse Shadow.

"You can't keep trying to force it, Sonic,” he smirked, “this little cocklet knows who it belongs to now.” Shadow’s words weren’t helping, and soon Sonic's whole body was trembling as Shadow's pre soaked hand practically crushed his cock as he beat it. 

He couldn't hear anything, but he felt Shadow's strokes all over him. It was even harder than normal, long, thick and muscular. Shadow stroked it faster, and whispered in Sonic’s ear, after which, finally Sonic could hold on no longer.

“Cum for me, faker.”

He screamed and threw his head back as his climax raced through his body, his balls tightened up in an instant, his cum shooting out of his cock like a sprinkler going off. Rope after rope of slick white fluid flew from the stretched slit, landing with a just audible tap on the floor. Shadow continued to pump him as a came, almost impressed by the total amount.
"Damn, Sonic, you'd think you liked being my plaything, huh?" Shadow teased as he continued to jack him off, sending Sonic quite delirious. 

"Please, I've earned a real cock!" Sonic begged, all while moaning and whimpering as he came down from his orgasm. Shadow chuckled and raised an eyebrow. 
"A real cock? Again? Well, I'm not called the Ultimate Lifeform for nothing." Shadow huffed amusingly to himself. Shadow then removed his hand, Sonic's cock now limp. He gave the head a few licks, to taste the cum on his lips and then let it go. Now back in character, he yanked Sonic’s quills and threw him on his hands and knees. Before him was the pool of his own cum, quickly cooling on the cold floor. Shadow stood, and spoke in a level voice.
“You’ve made a mess, clean up after yourself.” He smirked as Sonic bent down further, licking the floor to collect his cum with his tongue, which incidentally put his still unconquered rear on full display. Once a last little gulp came from Sonic, his rather humiliating task complete,  he turned around to Shadow, still on his hands and knees. He broke character though when he noticed that Shadow was already at full mast, whereas he was definitely going to be ‘down’ for a good while.
“You’re hard already!?” to this Shadow only laughed.
“I’m the Ultimate Lifeform, don’t you think Professor Gerald knew to phase out one or two biological barriers?” he asked. Sonic was in awe, Shadow needed absolutely no down time, no refractory period. Satisfied with Sonic’s look of shock, Shadow slowly walked towards the kneeling hedgehog, throbbing and erect, ready to take that annoying mouth again and again. Shadow’s plan hadn’t changed, Sonic was going to worship his cock non-stop for hours and hours. How many loads he’d have to take before they were done though was anyone’s guess.
"Now then pet, let's have some more 'playtime'. 

THE END