FSE

Furry search engine

formerly SoFurry search engine

Tags include the following:

Transformation, Wolf, Hound, Hell Hound, Brothers, Family, Bestiality, Rape, Incest, Demon, Male Lactation, Milk, Milking, Growth, Muscles, M/M, Blowjob, Cub, Puppy, Underage, Humans, Muscle Growth, Cock Growth, Hairy, Musk, Beard Growth, Body Hair, Body Hair Growth, Corruption, Ash, Soot, Strong Language, Cursing, Smoking, Orgy, Muscle Worship, M/M/M, Burning, Destruction, Violence (not in yiff),

WARNING! This is a crazy story! It has all sorts of violent, socially unacceptable, and explicit topics in it. I try to cover as many tags that fit the story, but I will probably miss a few. If you are sensitive about these topics please don't read this story. I have other more vanilla work that you might enjoy.

So, do you really want to read this?

If not that's cool. If so read on.

Bo

A slightly disgruntled teen found himself standing outside his own house at half past five that same afternoon. Bo couldn't help but frown as he realized his house key was gone. After a few hard pounds on the door a low masculine voice inside the house called out impatiently, "hold on a fucking minute!"

Bo could have sworn there was a soft growl to the tone of the voice. When the door finally opened he was surprised to see Hunter half naked and wearing a pair of Bo's pants. "Hunter?" Bo asked and looked at his brother in confusion. Not only did Hunter look a lot more muscular, but he was taller too. His chest looked like a suit of gladiatorial armor with a perfect set of abs to complete the picture. On top of that he was nearly even with Bo in height now. "When did you get so big Hunt?"

"Bo," Hunter said frantically, "you gotta come fast!" Before Bo could reply Hunter bolted into the darkened interior of the house. As soon as Bo stepped inside he realized he could still see even though there were no lights on. It was like seeing in black and white, only everything was red instead. "Bo, Hurry up," Hunter shouted as his brother looked around the front room.

Hunter had just stepped into the kitchen when he saw Rex sitting with his face in his hands. Bo instantly knew something was wrong with their younger brother. "Rex," Bo said and rushed over to the smaller male. He pulled the young man's face up to look at him and frowned as soon at what he saw. Blood was caked over most of Rex's face and on his hands. A steady dribble of blood was coming from the kid's forehead where it looked like something had broken his skin. "Rex, what happened?" Bo asked. He might have been talking to Rex, but he turned to Hunter and pointed to the sink. "Get me a wash rag Hunt!"

"I... I..." Rex said and sniffled as he tried to speak but broke down into sobs again. Bo felt something warm and wet press into his hand and he knew Hunter had handed him a wet rag. With a steady and surprisingly gentle hand Bo began to wipe the blood from his brother's face and hands. Eventually Rex managed to stop crying long enough to speak. "I got into a fight... on the way home from work today..."

"What happened?" Bo asked.

"He was walking with Spike when some kid came at them," Hunter spoke up, "I was there, but the kid couldn't see me."

"What do you mean he couldn't see you?" Bo asked angrily as a wave of heat swept through the room.

"I mean he couldn't see me!" Hunter said and gestured at the room around him. "I was fucking naked, and he couldn't see me."

Bo shook his head and turned back to Rex. He was just getting the blood wiped off when Bo noticed two tiny nubs on his brother's forehead. They looked like tiny black horns. "Tell me what happened Rex. I won't be angry with you. Ok?"

Rex nodded and wiped his nose before looking up at Bo. "There were some kids making trouble at the shop today, and I told them to leave before I set Spike one them. They left the shop, but when I was walking home with Hunter they jumped me. I tried to fight them off, but they were too strong. Hunter beat up a few of them, but the others ran off. Then my forehead started bleeding and Spike ran after them. I... I don't know where he is!"

"And how did Hunter end up naked through all this?" Bo asked in confusion.

"Spike and I were... messing around... and I sorta ripped my clothes up... or burned them... I guess..." Hunter said nervously.

"Whatever," Bo said angrily, but the sound of the front door opening and closing distracted him.

"Who turned out the lights?" A familiar voice called out from the front room.

Hunter frowned as he concentrated and the shadows around the house seemed to evaporate. Bo realized he had been seeing everything in complete darkness and hadn't even thought much about it. When Clay came into the kitchen Bo was surprised to see the man's eyes glowing red in the dim light of the room. Even more surprising was the sight of another man walking into the kitchen behind him. "Is everything ok in here?" The stranger asked.

... Spike...

For the first time since he had come to this strange world and met his mate, Spike was angry. No, he was furious! He had tried to scare off the humans hurting his mate, but they hadn't run off until one of Spike's pack mates had joined in on the fight. Seeing his mate hurt like that had set something off in the young dog, and now he wanted revenge.

The group of humans had splintered many times as they fled from Spike. He wasn't a small dog at this point, but as the sun set over the park Spike could feel his power growing. The end of the chase began as soon as the humans made the mistake of running into the woods. Once he was in the shadows Spike reached out with his mind and pulled the shadows around his prey. In moments they were stumbling through the sparse trees and bushes. Their weak human feet could barely keep them up and running as Spike slowed his pursuit.

At this point the alpha, who had led the attack against Spike's pack, only had three other young humans around him. They wouldn't be much of a problem for Spike. Eventually one stupid young man broke away from the other three. He thought he was safe in the darkness, but Spike fell on him with an unnatural fury. Unfortunately for the human Spike wasn't interested in killing him.

Spike grunted as his huge foot-long cock clenched and sprayed acidic burning pre onto the grass below him. He easily pinned the human below his substantial mass and his pre soaked cock literally burned through the young man's pants. Spike growled low as he thrust into the young man who screamed out in pain. Not far from Spike's unfortunate first victim his friends froze in terror. Even while Spike fucked the first of his prey his control over the shadows grew stronger. Solid beasts began to form from the darkness around the three remaining humans. To the young men it looked like they had been surrounded by a pack of huge black-furred wolves with glowing red eyes.

Normally, when spike fucked his pack mates, he wanted to make them stronger, smarter, and more powerful. His goal for fucking this human was far more sinister. Humans should know better than to act like animals, so Spike thought it would be a fitting punishment to make this human a beast. As his corrupting pre soaked into the young man's ass a startling change began in the youth. Fur began to sprout across his body like rough black weeds growing from his skin. His bones cracked and shifted as Spike began to drool his unholy black saliva onto the young man's neck. In moments, and before spike had even cum into the poor human, his face was pushing out into a muzzle and his thoughts were beginning to dim. A blast of demonic cum sealed the poor boy's fate. Spike growled savagely as he filled the beast's ass with cum. It only took a few more moments for Spike to dominate the mind of the stupid animal below him. By the time he pulled out of the large dog-like beast it was already an obedient thrall to Spike's growing power.

After pulling out of the human Spike stepped back and looked at his work. The new thrall was muscular and thick. His broad shaggy muzzled drooled black slime onto the ground as he looked innocently at the creature that had created him. As dog-like as the new thrall looked he still had hands that could grab objects, and legs built to walk on either two paws or all four. He was more muscular than a human, but he was nothing compared to the beautiful muscular males that were part of Spike's pack. The stupid beast whined and lowered its ears as it looked at Spike expectantly. Its short foot long tail drooped as it sensed the disappointment of its creator.

Spike woofed as he looked through the shadows to where the other three humans were cowering in fear at his shadow hounds. Without needing to speak the new thrall knew what his master wanted him to do. Spike set off through the trees towards the humans with his thrall in tow. Spike darted through the shadows and targeted the two remaining humans beside the alpha who had attacked Spike's mate.

It didn't take much effort to drag the unfortunate humans into the darkness. While spike rutted with the second human his thrall viciously fucked one of his former friends. This time Spike didn't even have to cum into the poor teenager. His pre and saliva alone were potent enough to change him. This thrall was even weaker than his first, but that didn't bother Spike at all. He didn't want to make these humans stronger, he wanted them to pay for what they had done to his mate.

Just before he turned to the last of the humans a burst of pain made Spike pause as he decided how he would destroy this human. Two pointed bony growths began to jut out of Spike's head as he plotted the fate of the final human. He would have whined at the pain, but Spike knew somehow that it was proof that his powers were growing stronger. Each time he changed one of the humans into a thrall he could feel his own mind absorbing parts of theirs. Only the strong and useful parts of their human minds had been worth absorbing. Now that he was both stronger and smarter Spike knew what he wanted to do to punish this human.

Up until now Spike had only given his demonic essence to the humans. He had rewarded them for loving him, for feeding him, and for joining his family. Now it was time for Spike to take something from humanity for himself. Feeding on his pack mates made Spike grow a little, but changing humans gave him far more power. What if he absorbed a human completely? Spike was ready to find out.

The unfortunate human wasn't a weakling like the other young men who had followed him blindly. He was obviously a muscular and fit young man. A word swam through Spike's conscious as he circled the blind human. Football. This human was a football player... and also something called a jock. Spike growled as he stepped out of the shadows towards the large meaty human. There was obviously a lot of good material to absorb on this human.

"Oh shit!" The young man said when he saw Spike. "You're some sort of demon dog... a... a hell hound!"

An unnatural laughing sound rumbled up through Spike's throat. He couldn't speak human words yet, but those words seemed to fit him. He was a Hell Hound; Spike liked the sound of that.

The large teenager yelped as the three thralls grabbed him and wrestled him to the ground. Spike couldn't help but smile as the teenager looked at the faces of the thralls and barely recognized his friends. Granted, they were more dog now than human, but if you looked real hard you could almost see features from their past lives. "Oh god! God, please help me!" The words seemed to almost sting in Spike's ears. They might have held more weight if the young man hadn't been so vain and foolish.

Spike paused as he locked eyes with the frightened human. For a moment it was like he could see into the young man's soul. Spike saw hundreds of days spent bullying others, stealing from kids, and even beating kids up. Spike looked deeper and saw an abusive father beating this young man. Then the man was gone, but in his place was a familiar evil. If there was any hope for this mortal than it had long ago forsaken him. Before Spike decided to end the young man's life he looked towards the boy's future. All Spike saw was more violence and suffering. The world would be a better place without this human.

A bone chilling scream escaped the human's lips as Spike opened his snout and willed his jaws apart. To the human it was like watching a large black dog open its mouth like a hippo would, only instead of a throat there was a glowing red pit of lava inside the demonic dog's stomach. Spike closed his gaping maw over the human's head and began to swallow him whole. The scream was abruptly cut off as the boy's head hit Spike's stomach. Almost immediately a flood of knowledge rushed into Spike's brain. By the time he had swallowed the boy's shoulders Spike had absorbed enough of the human's brain that he could understand complicated language and concepts.

With his newfound knowledge Spike began to think of his mate... no... of Rex. He had heard the others calling his mate that word, and it was a name, not a word. Rex was Spike's mate, and Spike was Rex's mate. As Spike consumed the boy's chest his own body was beginning to crack and grow below him. His front two paws began to change shape into large muscular hand-paws. Spike's chest popped and stretched as his chest repositioned along with his shoulders and arms. In moments he was able to reach up with his new hand-paws and guide the last half of the human into his throat.

Spike continued to pack on muscle and size as he ate the human teenager. It didn't take long to add the boy's mass to his own. Once the human's shoes entered Spike's snout he quickly snapped his jaw shut and growled loudly as a pleasant feeling of fullness spread through him. He continued to pop and grow for a while, but eventually the human was completely absorbed, and in his place was a new and improved Hell Hound. One with thoughts and feelings like a human, but wild instincts and senses like a dog. Spike still looked canine despite his vaguely human upper torso. Sure his chest was broader, and he could stand on two legs, but he was still more canine than human. His head was also larger, but only because he needed more brain space for all his new thinking.

Looking at his obedient thralls made Spike laugh. In truth they weren't so different from him now, but they lacked his powerful muscles and the horns on his brow that marked him as a true demon. Now that he thought about that word it made sense to Spike that he might be some sort of demonic monster. Thinking of monsters reminded Spike of his mate. Through his link with Rex the Hell Hound could sense that his mate was in pain. "Rrrrex," Spike tried to say. It was still hard to speak human words, but Spike liked how his mate's name sounded when he spoke it. "Rrrrex... Rrrex... Rex."

... Clay...

After driving around the block a few times Clay and Mark spotted a medium-sized black dog walking along the concrete. Clay slammed on the breaks as soon as he saw the dog and jumped out of the car without even turning it off. Mark was smart enough to reach down and put the vehicle in park before he got out to follow Clay.

"Spike!" Clay said in a desperate and loud voice just before he tackled the dog. He didn't know exactly how he knew it was Spike, but something inside the man told him it was him. "Oh Spike, we've been looking all over for you!"

Spike seemed just as excited to see Clay as Clay was to see him. The dog eagerly licked the man's face and coated it with dark slimy saliva. Clay just laughed as he let Spike lick him and then hugged the dog to his chest. It was a little surprising to feel Spike hug him back just a little. "So this is the infamous Spike, eh?" Mark said as he walked up to his boyfriend and his dog.

"Careful he bites..." Clay was more than a little surprised when Spike tackled Mark and tried to lick the man to death. "He must like you..."

"I guess so," Mark said and laughed as he pushed Spike off his chest. Once the man was standing he put his hands on his legs and crouched slightly as he looked down at Spike. "Who wants to go home and see Rex?"

Spike woofed excitedly and ran around in a circle. Clay was shocked to see his normally docile canine companion acting so... dog-like.

"That's a good boy!" Mark said and reached down to scratch Spike's ears. When his hands found two large lumps jutting out of Spike's fur his smile faded a little. "Has Spike always had... ugh... horns?" Mark asked.

Clay looked down at the dog's head and ran his own hand through Spike's fur. "Not that I remember... but it might explain why Rex has them now..."

Spike whined at the mention of Rex. Mark seemed surprised, but Clay began to sense that his little doggy might actually be worried about Rex. "Let's get you home Spike." Clay said and patted Spike's horned head before dropping the tailgate. Spike jumped up into the truck bed like he had ridden in one a hundred times before. Mark didn't seem to think that was odd, but Clay certainly did. He couldn't help but to frown slightly as he got back in the truck and started to drive home.

The moment Clay arrived at his house Spike eagerly followed him through the door and into their home. Mark was right behind the pair smiling at how cute Spike was acting. He sure didn't seem to need a leash when he was around Clay, so why had the dog run off when he was with Rex?

Speaking of Rex, when Spike saw the young man sitting on the couch nursing his bleeding forehead the dog actually woofed in surprise. Everyone watched as Spike jumped up on the couch and gently pushed Rex's hand, and the bloody rag, away from his newly grown horns. Spike began to lick the wounds with his impossibly long black tongue. This was the first time any of the others had seen his demonic tongue instead of the regular one he had most of the time. As the black saliva was slathered over the horn nubs Rex couldn't help but cry out in pain.

To Clay it looked like Spike was encouraging the horns to grow. That was true to an extent, but everyone was too shocked to do anything but watch. Every time the huge black and red muscular tongue licked the horns they seemed to grow a tiny bit bigger as they extended out of Rex's head. In a few moments they were past an inch in length and the skin around them was beginning to permanently change color. When the horns finally stopped growing they were an inch and a half in length, reasonably thick for their size, and the skin around them was black with what looked like tiny hairs growing from it. The other males recognized the hairs because they looked exactly like Clay and Bo's body hair did. The hair was thick and black with a hint of red in it.

It was a little surprising to hear Mark speak up after watching such a strange thing. "This is incredible." He said in awe and surprised everyone around him. "I've been having these weird dreams about a dog these last couple of nights, but now I understand why I was dreaming about him. There must be some sort of bond forming between you guys. It must be like a family bond..."

Hunter smiled at the mention of a family bond. "When I was heading home this afternoon nobody could see me because of the shadows, but Rex and Spike noticed me right away. I felt so lonely and out of place until I was with them..." Hunter blushed as he looked at his brothers. I also met someone at school... His name is Neal, and I think he's really into me."

"I also met someone, but I have another confession to make," Bo said sullenly. "The reason I wasn't home today was because I was messing around at the pool hall with some guys. We were... smoking some cigars... and doing other stuff all day today."

"You mean you didn't go to school!" Clay shouted angrily.

"No." Bo said softly and guiltily shook his head.

Clay groaned as he looked around at his brothers. "I don't know what to say..." He paused before he continued. "I try to be a good role model, but look at how everyone turned out?" Clay growled as he rubbed his own forehead. "From now on Rex stays home or he comes to work with me and Mark. Spike can't be running around all day at school, so someone has to stay and watch him during the day. Bo, since you don't want to go to school anymore you get to watch your brother and Spike on the days he can't come to work with me..."

"Ok," Bo said submissively.

"And Hunter... I know this new shadow stuff makes it hard for people to see you, but please try to go to school during the day and let the teachers know you're there. I can't handle explaining why all three of you are missing classes at once. For now, at least, we are going to have to work together and try to get by until we can figure everything out. Ok?" Clay finished and everyone nodded, even Mark.

After his talk with the boys Clay and Bo cooked up a huge dinner for everyone except Rex and Spike. It was a little surprising, but Mark offered to feed the two while Clay handled dinner. Rex was a little shy about sucking on his brother's boyfriend's teats, but milk was milk and he was always hungry these days. Spike, however, had no qualms about feeding on this new member of their pack. In fact, as he fed, the dog eagerly drooled thick black slime all over Mark's chest. It didn't take long until the man's whole torso was lovingly coated with the black slime.

Mark had to eat shirtless that night because of his slimy chest, but nobody really cared. Clay was secretly proud of how hot and muscular Mark looked with his chest painted black and his nipples bulging outwards like inch-long mini-cocks. Dinner was meat loaf, which Clay was actually pretty good at making, and despite making four loaves it all got eaten between the four hungry males. Bo ate first because it was his turn to feed Rex and Spike next. After dinner Rex found himself laying across Bo's chest on the couch while he drank from his brother's teats. Bo didn't seem to mind, and just like with Mark, Spike was more than happy to slobber all over the young man while Bo fed them.

Once everyone was done eating and the dishes were put away Clay led the family into the gym where they all ran through a strict exercise routine. Even Mark was encouraged to challenge himself. He turned out to be pretty strong, but nobody could outmuscle Clay. Long after the other males had retired to the living room Clay continued to pound out reps and sets on the weights. He was already maxing out their bar and cable machines, but it wasn't the weight that made Clay enjoy exercising.

As it began to get late Mark told the boys that they needed to go to bed. He made sure every male was settled into their rooms before he went to the gym downstairs and found Clay still hitting it hard. Clay's body was insanely ripped, and since he was shirtless it gave mark a great view of his torso. Every tiny muscle on his titanic frame stood out in detail against his skin. His chest was rippling with sweat and thick wet hair. Mark couldn't resist the urge to interrupt the man mid rep and extract a long moaning kiss from him. "That was hot..." Clay said as he held no less than five hundred pounds over both of their heads. His arms didn't even quake as he proceeded to finish pounding out an impossibly heavy set of shoulder exercises. When he was done with his set Clay put the weights down and growled softly as he looked at Mark's black and bare chest. "Fuck, you're so damn sexy Mark."

"Now that the cubs are in bed maybe we can have some private time?" Mark suggested.

It seemed so natural to call his brothers cubs. Why didn't everyone call their brothers cubs? Clay grunted as he pulled Mark into his arms. He gave the man a long kiss and then sighed softly. A distant part of Clay knew he shouldn't fuck mark again so soon. The man had only barely recovered from his first fuck with Clay. Who knew what another blast of cum would do to the man. "You remember how you grew last time we fucked?" Clay asked.

"Hell yea," Mark said excitedly. "That was hot as hell!"

"What if there's some negative side effect to growing too much?" Clay frowned as he looked at the man in his arms. "I... I don't want to hurt you Mark, and you've already been dragged into this mess..."

Mark leaned up and planted a kiss on Clay's lips. "I understand better than you think Clay, but don't think that I didn't decide to be here with you. I know something crazy is going on with you guys..." Mark paused as he looked down at the huge bulge in Clay's pants. "How about I come over tomorrow and we can work on this thing together?"

Clay nodded and growled softly as he pulled Mark into a musky muscular hug. He couldn't help himself as he buried his face in the other male's neck. Mark's scent was so strong and relaxing to Clay. In a way it felt like Mark was everything Clay wanted in a man. He didn't know how powerful his own ability to corrupt was, but at the rate Mark was changing he wasn't that far from being exactly what Clay wanted. More than anything Clay wanted a man who could love his family as much as he did. Mark knew it would take time to earn his place beside Clay, but he was willing to wait and see how everything turned out.

After a long passionate kiss the two lovers smiled big goofy smiles at each other. Clay led Mark to the door and gave him a steamy goodbye kiss. It wasn't until Mark's truck had pulled out of the drive way that the sweaty muscular man felt like he could control his sex drive. Clay had been afraid that if Mark did stay he wouldn't be able to resist the urge to fuck him all night long.

... Spike ...

From the darkness of Rex's room Spike could sense everything in the house around him. His mind was slowly absorbing information from the human in his muscular canine arms. As Rex unknowingly shared his knowledge and memories with Spike, the Hell Hound's mind began to slowly meld with Rex's. Instincts flooded the young human's brain as he slept. By the time Clay, Bo, and Hunter were asleep Rex was beginning to think like a dog would. Spike couldn't have been happier. In the darkness of Rex's room the hound tenderly pulled the human into his arms and began to slowly make love to him.

Rex woke as the arms of his canine lover wrapped around him. Spike felt more like a furry young man than a dog, and in the darkness of his room Rex could see his dog's human-like features. Spike growled as Rex woke up. "Rrex," Spike said with a heavy growl to his inhuman voice.

"Spike!" Rex gasped when he heard his dog trying to speak. "Did you just say my name?"

"I roove rooo Rex!" Spike said quickly as his ears went down in shame. He wanted to talk to Rex earlier, but the others didn't seem ready to see Spike's new human-like form. As long as he was out in the light Spike couldn't quite hold his new form. In the darkness of Rex's room it was easier to hold this new shape.

A soft chuckle escaped Rex's lips as he nuzzled Spike and whined softly. The gesture meant more than words ever could. Spike knew his mate had accepted his new form just like he had accepted Spike when they had first met. It seemed like such a short time ago, but Spike already knew he had always been meant for Rex. "I love you too Spike... I loved you from the moment I first saw you."

Spike pulled Rex into his arms and began to push himself down onto the other male's growing wolf cock. A moan of lust escaped Rex as his lover's ass closed over his red wolf cock. As Rex sank into Spike their connection grew even stronger. The horns on Spike's head cracked and began to glow red in the darkness. Rex's horns also began to glow as the two males were joined together.

Unlike the other times Rex had fed Spike his seed, this time he could feel his human energy feeding the beast in his arms. The urge to feed Spike's growing unholy power consumed Rex's mind. In moments his cock began to piston in and out of Spike's burning ass. Each time Rex pushed his cock into Spike a small blast of pre would shoot into the young hound. Rex growled in lust as the sensation of feeding Spike's power made him groan uncontrollably.

A soft crackling sound came from the horns of the two males as they fucked. Spike's horns had just grown past their fifth inch of height when Rex's horns caught up to his. Spike eagerly licked the blood from his mate's forehead as his horns grew, but after a few minutes of fucking the black flesh on Rex's forehead became tough enough to withstand his horn growth. When their horns reached six inches Rex cried out softly as he slammed into Spike and spilled his load into the canine. Rex's cum was pitch black now, and as he pulled his cock out of Spike's ass it was a deep blood red in color.

Spike whined as his mate gave him the biggest load he had ever managed to date. As he held Rex in his muscular arms a soft crack came from the Hell Hound's body. Spike could feel his body feeding on the demonic seed of his mate, but to Rex it felt like the muscles of his lover's arms were growing larger and firmer. Spike growled as he sensed the desire of his mate flowing into his body. Rex wanted Spike to be huge like Clay was, but they both knew that the oldest member of their pack was destined to be far larger than Spike would ever be.

Eventually Rex fell asleep in Spike's arms. The industrious Hell Hound would have loved to stay with his mate, but the urge to feed was just too strong now. Rex whined as Spike slipped away from him. Spike reached out through the shadows and wrapped his mate in a blanket of warm shadow energy. The whines stopped as the shadows enveloped Rex. It wasn't like being held by Spike, but the shadows were as much a part of Spike as his own body. It would have to do for the moment.

For the first time in his short time living with the humans the young Hell Hound walked on two legs down the hall towards Hunter's room. The second youngest of Rex's brothers was coming along nicely. His room was completely dark, and his growing power seemed to reach out into the night and drink in the lights well beyond their house. Rex could see easily in the unholy darkness, but the shadows seemed to almost welcome the powerful Hell Hound. Hunter moaned softly as Spike crawled onto the hard black surface that had once been the young man's bed.

Unlike the other objects in the house the beds each male slept on were subjected to a huge dose of unholy energy every night. For hunter that energy had begun to turn the bed solid and black like a huge obsidian stone. The petrified surface of the bed might have been uncomfortable to a normal mortal, but to Hunter it was like sleeping on the softest most luxurious shadows. Spike couldn't help but growl as his long black tongue snaked out in the darkness and found Hunter's proud shaft waiting for him.

Hunter had a full blown wolf cock now, and Spike found that he preferred the young male this way. It didn't take long for Spike to suck down most of Hunter's huge twelve inch shaft into his maw. As he sucked on the huge wolf cock Spike drooled buckets of black slime all over the human. Hunter eagerly spread the soothing black goop over his body. Before he could completely cum into Spike Hunter began to moan in pain. It was his turn to feel the pain in his forehead as two nubs broke his skin. The more pre Spike drank the more the two nubs grew and pushed up into the air. Spike and Rex's horns had stopped growing at six inches, but Hunter proved to be a stronger male that night. Just before he exploded into Spike his beautiful ebony horns peaked at seven inches.

Hunter's horns were comprised of pure demonic shadow, and they were even black to Spike's eyes. Once the young male was completely empty Spike released his cock and looked at his handiwork. The Hell Hound hadn't noticed it, but Hunter was drooling midnight black slime from his mouth now. Hunter hadn't grown much as he fed Spike, but his horns looked amazing! Thinking of how sexy Hunter's drool-dripping mouth would be when it was a fully developed snout made Spike growl in lust. He was happy with how Hunter was turning out.

After draining Hunter's cock Spike quickly drank his muscular pecs dry. It was the first meal Spike had indulged in since being fed for dinner. Admittedly the young hound was pretty hungry, but he knew where he could get more milk and another huge dose of cum. One benefit of feeding on Hunter's seed was the increasing power Spike felt in his new form. He couldn't help but feel like this new form was the natural progression of his own changes.

Before he even opened the door to Bo's room Spike could feel an intense heat radiating out from it. Upon entering the room Spike's shadow powers were unable to suppress the light coming from Bo's slumbering body. Dark red flames whipped around the young man as he slept on as large molten slab of black demonic stone. Lava lines constantly cracked through the slab of rock as Bo slept upon its surface. Spike felt invigorated by the inferno of heat raging in the room, and Bo groaned softly as his bedmate for the last few nights wandered in. He had always been the lightest sleeper of the four males. It didn't surprise Spike to find Bo half-awake and waiting on his molten alter of sex. "Mmm... Spike... Come here boy."

Spike woofed happily as he walked over to Bo and watched as the male sat up on his demonic bed. Bo still looked mostly human despite how powerful his control over heat had become. The whole room was beginning to look more like a tiny pocket of hell now. The walls were growing into solid slabs of molten stone. Spike decided he liked the new décor. It suited Bo's rough fiery personality.

Bo surprised Spike when he looked at the partially anthropomorphic beast walking into his room and smiled. "I was wondering if you were changing like we are..." Bo said and grinned as he held up his huge thirteen inch cock. The large slab of meat was already drooling pre, but unlike the dark black pre the other males had Bo's pre was actually glowing like molten rock.

Spike growled as he crawled up on the burning alter of fire and sex. He eagerly took Bo's cock in his snout and began sucking down his unique seed. Bo's burning hot pre was extremely potent. Spike felt the heat coursing through him like an explosion of energy. It was time for Bo to be rewarded for embracing his new powers. The young man groaned in lust as the cock in Spike's maw began to change from a human cock to a wolf cock. It was almost amusing to watch Bo's face as his pleasure doubled in intensity. As his cock changed it began to grow larger and harder than before. It quickly surged past fourteen, fifteen, and then sixteen inches of wolf meat, but unlike Rex and Spike, who had blood red cocks, and Hunter, who had a black cock, Bo's wolf cock began to look more like a glowing slab of molten rock. It certainly seemed to gush pre just like a volcano would, so the solid stone-like look suited the cock perfectly.

Bo's moans of pleasure were broken by a growl of pain. His forehead cracked open and glowing red lava-blood flowed from his wounds as two monoliths of demon stone pushed up from the young man's forehead. In moments the two stone horns had surged past six inches and were creeping up past seven and then eight. Just like his brother before him Bo couldn't hold himself back anymore, but his horns had grown to eight inches before he exploded into Spike's snout. As the Hell Hound fed on the magma flow of demon spunk his own power over heat began to grow stronger. A fire was ignited in Spike, and before Bo was finished pumping cum into his mouth Spike was beginning to enjoy the unholy heat.

Bo happily nursed Spike after feeding the dog his spunk. The two of them laid together for a while before Bo fell asleep. The heat in the room faded a little as the male slept, but it was still far hotter than any normal human could have survived. Spike eventually rose from beside the passionate hot-head and snuck out of his tiny pocket of hell. There was still one more male who was waiting for Spike's attention.

Clay was only barely sleeping when Spike entered his room. The male growled in lust as his nose picked up Spike's scent. Of all the four brothers Spike felt like Clay had come the furthest in his transformation, but tonight it was time to take things to the next level. Clay was already painfully hard as he slept upon his coverless bed. The surface was already changing into demon stone, but something interesting was happening to the slab of rock.

It was painfully obvious to Spike that the male sleeping in this room was beginning to exhibit a unique set of powers. The surface of Clay's bed was indeed turning to a solid block of demon stone, but unlike the other stone beds in the house it looked like some sort of root-like growth was beginning to spread across the base of the stone. A few tendrils of the black plant-like growth had already started creeping up the side of the demon stone bed Clay slept on. Tiny black hair-like filaments were growing from the unholy plant sprouting at the base of Clay's demon stone bed. His stone was the largest in the house so far, and to Spike that just showed that his powers were growing the fastest.

When Spike hopped up onto the stone alter of sexy demonic muscle he found that Clay's cock was already rock hard and drooling black pre like an open faucet. The man groaned in his sleep as the proximity of the nearby Hell Hound stirred his instinctual need to fuck and feed his pack mates. Clay growled like a wild beast the moment Spike leaned over his pre soaked cock and began licking at the impressive member. As much as Spike wanted to feed off Clay's potent cock he needed to bath him in black drool first. Clay woke for the first time since this nightly ritual had started just as Spike began slathering his ebony slime onto his body. "Fuck yea boy..." Clay moaned as his eyes opened and he saw Spike drooling and licking his body. The strange ritual was so sexy to Clay and Spike that they were both hard by the time Spike finished painting the muscular body of his growing alpha Hell Hound. Spike took extra care to guide Clay onto his stomach so the young hound could coat his back in a thick layer of drool. Instinct told Spike that Clay's body was almost ready for the next level of his transformation. He wasn't quite there yet, but the oldest brother was certainly exhibiting the physical and mental signs of developing into a powerful alpha hound.

Once his entire body was painted black with Spike's deadly black saliva Clay rolled over and smiled at the dog sharing his bed. He didn't need to tell Spike to wrap his long demon tongue around his cock and slurp him down. The hound eagerly did the deed without a second thought. Clay had been oozing black pre the whole time Spike had been slathering his sexy slime all over the man's body. Even with a coat of black ashy drool Spike could tell something amazing was happening to Clay's cock. Just the contact of Spike's body was causing the member to slowly pulse and pump every couple of minutes. Clay was already starting to react to the demonic power growing inside his body. His cock was slowly gaining length and thickness as it steadily fed Spike a rich diet of demonic seed.

Spike's horns began to glow in the darkness of the room, and in response to the hound's increase in power Clay cried out in shock. His brow began to ooze thick rust-brown blood that smelled strongly of corrupted earth and ash. In a few seconds two beautiful red and black horns pushed out of the man's forehead and rose into the air. The wounds at the base of the horns smoldered and smoked as Clay's body began to grow hotter. In seconds the blood coming from the base of the growing horns was more like molten metal than blood. It was still a deep red-brown color, but it was more like liquid iron than blood.

The change in his blood composition had an instant effect on Clay's physiology. He felt like his body was being filled with liquid heat. In a few moments he was growling in ecstasy. His cum quickly grew thicker and hotter as well, but it wasn't quite like the lava cum Bo had. Clay's cum was the thickest and densest so far. To Spike it was like the changing human had grown ten times more potent in the space of a few seconds.

As more and more molten pre pumped into Spike his power over the human before him grew. Clay began to grunt low and heavy like an animal would as his skin began to itch in a terrible way. The hair on his chest began to grow incredibly dense and in a few short moments it was far thicker than any fur on any mortal creature on earth. Only Spike seemed to possess fur half as thick as Clay's and Spike was just a cub when compared to the elder beast he was trying to turn Clay into.

As the sexual encounter continued Spike began to pour even more demonic power into the human. Clay's eyes shot open and revealed a new change that was taking place. The whites of his eyes were now midnight black, and his irises were now a metallic golden color. Lines of glowing red energy flowed through the black of his eyes like little rivers of molten metal flowing over an ebony sea. An unholy red light came from the pupil of his eyes now, but to Clay it was like his whole vision had exploded with detail. Even Hunter's powerful sight couldn't compare to the eyes Clay now had. His new sight was so powerful that he could actually perceive the lines of demonic energy flowing between himself and Spike.

As his powers to perceive the demon energy grew stronger so did his ability to manipulate it. Clay reached into the air and seized the lines of power flowing from Spike into his body. It wasn't a physical gesture so much as it was a spiritual one. Somehow Clay knew where he wanted to direct the energy flowing into his body. He pulled the lines up to his brow and grunted a low inhuman grunt as all of Spike's power began flow into his horns.

The two pillars of demonic might cracked loudly as they began absorbing all the energy Spike could give them. The horns were already four inches long, but they quickly shot up to a mighty eight inches and thickened substantially. Clay was using all his power to keep himself from exploding into Spike. Somehow he knew when he lost his load his opportunity to grow stronger would be over. The second Clay's horns reached a foot in length he roared out in lust and his cock began shooting pure unrestrained demon seed into Spike's hungry body.

Spike began to grow and shift as he drew a massive amount of human energy out of Clay. A strange exchange of thoughts and emotions began to flow between the demon dog and the changing human feeding him. Clay's mind was filled with alien thoughts and instincts while Spike gained even more knowledge of the human world from his pack mate. To Clay it was like Spike was filling his head with Hell Hound thoughts and instincts. While the human spewed more and more cum into the hound below him the demonic dog began to shift into his human form. Clay could only watch in mute fascination as Spike became more and more human by the moment. He still had a very distinct canine body, but after absorbing so much mortal energy from Clay and his brothers Spike was starting to gain features similar to their own.

Spike's human-like form was starting to mimic the broad shoulders and muscular torso that ran in Clay's family. He still had a dog head, but his face looked more human now than it ever had been before. Nearly a half hour passed as Clay and Spike shared thoughts and feelings with each other. To Clay it was really a very beautiful experience. He had never looked at his brother through Spike's eyes. It was pretty clear that Spike loved Rex more dearly than any human could have ever loved him. A primal bond began to form between Spike and his new alpha. The more they shared their minds the more demonic Clay's thoughts became. Before too long he was actually thinking like a Hell Hound instead of a human. That was the most beautiful part of the exchange for Spike. For the first time in his short life he wasn't quite alone anymore. He had a true brother in Clay, and the newly created alpha hound wanted nothing more than to become even more powerful.

When the feeding was over Clay groaned and rolled over. He didn't know why exactly he was so excited about what was about to happen next, but his subconscious mind was telling him Spike was ready to feed him more demonic seed. A soft groan of pleasure ripped through Clay as Spike mounted his beautiful ass without even bothering to lube him up. The pre drooling from the hound's cock did the job well enough, and in a few moments Spike was thrusting into Clay with wild passion. Unlike the nights before Spike was aware of a much deeper connection with his human brother this time. The hound began to slow his pace and really enjoy how erotic it felt to fuck Clay's ass.

In response to Spike's slowing pace Clay began to buck against him in eager anticipation of the burning hot rod invading his depths. A low popping sound came from Clay's body as he began to absorb more demon cum into himself. Once again Clay's body began to grow larger and more muscular in response to the demonic infusion. The most pleasurable change was happening to his cock, which was pulling into a fleshy sack that was growing at the base of his cock. As the newly grown sheath surged larger it swallowed more and more of Clay's human cock. The Sheath stopped growing when it was positioned just below Clay's navel. The thick red and black fur that had covered the sheath began to spread rapidly as it met his chest fur on his stomach and then spread over most of the man's ass and groin. Clay began to groan just like a real Hell Hound might as his new cock started to emerge from its new home.

In a few seconds a huge rust-red wolf cock emerged from the sheath and surged out into the air below the crouching human. Lines of glowing molten metal coursed along the cock just like blood veins might do across a human's skin. The cock glowed slightly in the dark of the room, but Clay could see it in a level of detail that no mortal creature could have ever achieved. He knew that the lines of red energy were pure demonic blood unique to his own body. Spike was slowly changing him into some sort of monster, and now that they had shared their minds Clay had an idea of what sort of beast he was destined to become. The vague image of unrestrained power and sexual dominance was like a drug to the human. His ass began to pull the demon behind him deeper into him in an attempt to milk more seed from the young hound. Spike couldn't hold himself back anymore. He tilted his head back and howled glorious release as he exploded into Clay and filled him with the seed his body craved.

Clay's growth exploded the moment Spike came into him. He began packing on mass like crazy, and in a few short moments he had reached 6'9 in height and he had packed on nearly a hundred pounds of additional mass. His muscles and body weren't the only things that grew either. His cock, which had already been more than sixteen inches long, grew along with his body. It surged in length until it had reached a healthy two feet in length. A knot the size of a large melon bulged at the base of the demonic wolf cock, and the thought of hilting his knot in Mark's ass when he arrived that morning nearly drove Clay to another orgasm.

When his growth was done Spike pulled out of the human who fell to the warm embrace of his demon stone bed. Spike growled as he looked down at Clay. "You are beautiful Clay..." Spike said in perfect English with only a strange accent to give away the fact that he was speaking with a wolf mouth.

"You can talk?" Clay asked as he rolled over and sat up to look at the half-human Hell Hound sharing his bed.

Spike chuckled at Clay's question. "I know everything you know, and now you have all my memories too. It's your right as my alpha to know everything I know, after all." Spike stretched his new beautiful half-human body and admired himself. He was about as big as hunter now, but that didn't make him any less of a cub in Clay's eyes. "Could you feed my mate Alpha Clay?" Spike asked in a whiny voice. "I have been keeping him asleep with my shadow powers, but he needs to be fed constantly if he's going to survive his transformation. He's... not as strong as your other brothers."

Clay growled as he got out of bed and made his way through his room. Spike followed close behind him as they made their way to Rex's room. Just like Spike had said, Rex was looking much weaker now. "What's wrong with him?" Clay asked as he scooped his brother up into his arms.

"His body is linked directly to mine, and when I use my demon powers it drains him too. I wasn't expecting it to take so much power to turn you and make you as you now are..." Spike sounded a little upset at his own lack of foresight.

"You need to be careful Spike." Clay growled as he scooped his second cub up in his arms and carried them both to his room. "I expect you to feed and help restore some of our brother's energy. He's going to need it tomorrow..."

Spike cocked his head to the side and looked at Clay who had just reached his own bedroom. He didn't need to ask a question because Clay understood his body language now.

"We're going to make another Hell Hound tomorrow when Mark joins us in the morning." Clay explained. "I can't be the only adult demon around here looking after all you cubs..."

Spike growled out his lust at the thought of helping Clay turn Mark into a sexy half-demon beast just like his alpha was. The thought of having another huge muscular alpha to feed him made Spike drool hungrily. When Clay settled into his bed the tainted human reached into the shadows and drew them over his brothers and himself. Rex unconsciously latched onto his brother's right teat and Spike eagerly took the left. Clay had a whole night left to feed his brothers, and he wanted them to be strong for their task tomorrow.

Now that he could feel the demon waking up inside him Clay knew why Spike had accepted Mark into their pack. The more humans the demon turned the more powerful they all became. It would take a massive amount of demonic seed to turn enough humans to complete their transformation into true demons, but Clay was filled with a new unholy desire to see Spike's demonic mission fulfilled. An unholy chuckle filled the room as Clay felt a surge of demonic power inside himself. He knew somewhere deep down inside that some terrible power in the depths of hell was working its way into his body and mind. Any normal human would have resisted the demonic intrusion, but Clay gladly welcomed the demon into his heart. He wanted his brothers to be even closer to him. He wanted them to feel the same incredible lust and power he now felt. If turning into a demon was what it took to keep his family together it was a small sacrifice for Clay to make.