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Introduction:

A demon is captured and studied in a top secret scientific facility.
*** A god forgotten church somewhere in the slums of a megapolis

Officer Sam and his colleagues bursted into the church to see two figures grunting in darkness. When his eyes started accommodating to the darkness, he distinguished a large silhouette of what looked like a demon. 3m tall, 1.5m wide in shoulders, a classical red skinned demon with wings and horns, horse legs and hooves in place of its legs. He was grunting and shaking, seen from his back. There where a slim leg flailing on his left and on his right, and female screams of pain coming from the front of the demon.

"Don't move, police!" - Sam yelled.

The demon stopped moving, but the agonised screaming didn't stop. He slowly turned around with a grin on its demonic face.

He was holding a female nun, her robe was torn to shreds and only the headpiece was intact. She was completely nude besides the headpiece. Her legs were bent so that they touched her shoulders, and the demon was holding her by her thighs, face away from him.

His penis was lodged in the nuns anal opening.

"Holy crap!" - Sam thought as the demon finished turning to them. Its cock was unnaturally thick, at least 3 inches in diameter. Considering its length, was not possible to determine as only about 2 inches was visible, rest in the nuns anal opening. The opening was white from stretching and the pressure.

The nun still hasn't stopped screaming, her cheeks were smeared with tears, eyes shut down and teeth clenched.

The demon was holding her and grinning at humans. He could disintegrate them immediately at the flick of his claw ending fingers, but was curious about what would they do.

******

The demon Caymxur has just entered this realm after roaming the void for several thousands of years. The last time he has seen humans, they were wielding sticks and throwing stones at him. Caymxur was immortal, his flesh was invulnerable and he had nothing to fear about, so he simply was curious and decided to play along.

He also wanted to see the look on other humans eyes as they saw the unbelievably sexy nun with a thick rail in her anal opening.

Caymxur has emerged from the void about an three hours ago in the church's catacombs, and felt presence of lesser minds immediately. He understood the change that humanity went from the last time he seen them, but he needed to obtain more knowledge.

This time he would not let himself be banished to the abyss.

Caymxur quietly followed the hallways of the catacombs until he reached the chapel. There were a lot of people and he just stood in the shadow, observing, invisible to the lesser minds at his will, sucking up their thoughts and immediately learning their new language.

A nun stood out among other nuns and people by her aura. He used his demonic powers to see through her clothes and understood why she caught his attention. Hidden under the robes there was a beautiful body, d cup breasts, tone thighs. She was wearing a lace black thong and a matching bra.

Caymxur never seen something like this before and he liked it. His cock immediately swells to its maximum 13 inch length and 3 inch width and starts painfully throbbing, driving the demon insane from lust.

After an hour the mess dissipated and only the nuns were left cleaning the hall. His lustful thoughts were making him restless and he mentally manipulated other nuns to leave and the one he liked to stay alone.

He had plenty of options. He could slaughter everybody in seconds, he could manipulate their minds so that they dont see him and freely walk among them, and many other options. But he liked the hunt. He liked to hide in shadows waiting for the perfect moment to strike.

Not hiding anymore, he rushed to the nun, his cock was hard as rock and trembling, precum oozing down the shaft. Reaching her in seconds her grabbed her by her waist and raised her in air like a puppet, as she started screaming from the horror! Immediately tearing off her robes and her underwear, revealing a neatly trimmed black 1 inch wide langing strip.

Turning her to to face away from him, bending her legs to her shoulders, grabbing her with both hands, pausing to admire her ass for a second, and thrusting her down on his cock, aiming at her anal entrance.

Failing to impale her in one go as she was completely dry and clenched from terror, his cock slips to front, going between her legs when her ass bumps against his lower abdomen with force. With this motion his cock smears all her crotch and lower abdomen with his precum.

The nun grimaces as the cock almost reaches her breasts and cries "NOOOO!!! BY THE LORD,
DONT DO IT!"

"Not so dry anymore, eh" - grins the demon, raises her above his cock once more and thrusts her downwards, simultaneously jerking his hips front and up. This time he doesn't slip and in tenth of a second his 3 inch wide shaft shoots in her ass, bottoming at 6 inches, pushing at a dead end and his cock painfully bends in an arc while he continues to push her down.

The nun screams through clenched teeth from the blinding pain in her anal entrance, all her anal cavity and the dead end of her colon, as Caymxur just holds her like that while he starts to suck everything she knows and has ever seen from her mind, gaining some knowledge of the world as it has developed.

******

Terrified at the sight, Sam yells: "Put your hands up in the air!"

Caymxur grins and does as he is said, letting go of the nun, while she limply slides of his cock, revealing some blood on it, and collapses on the ground.

******

A phone rings in a bedroom. Heidi wakes up and looks at the clock - 4:39. Who the hell is calling in the middle of the night?

*** Heidi Dowells' house

Heidi is a genius genetic scientist working for the government, temporarily working at a school, teaching biology while there are no serious projects that suit her profile.

She picks up the phone and sleepy says: "Hello??"

"Heidi Dowell, this is general Haffey. CODE PAPA DELTA.Pack up and get ready, a car will pick you up in 15 mins. Documents to the school of your departure due to sickness will be delivered to the principals office in the morning. You've got work to do!"

"Oh, okay" - she hangs the phone.

Her heart starts racing as she understands what has just happened. Code PD means "paranormal" and "demonic" activity. She was waiting all her life for this!

She jumps out of her bed and starts dressing up.

*** Facility P, 0530

As Heidi and some other scientists arrive, all hyped up, they are led to a briefing room, where the situation is explained to them, and some boring formalities and documents are to be signed by everybody, and protective suits are handled to everybody who will access the specimen chamber.

Then everybody leaves to their private lockers, where Heidi changes her clothes to a white, sterile, thick fabric protective suit. She was so rushing to dress that she didn't bother to put any underwear, so she just dresses it over her naked body.

Finally she gets to see the specimen. With a group of scientists she enters the hangar and they are led to a durable glass contamination chamber, where the demon is lying on his back on the floor, all his limbs chained to the ground and hundreds of sleeping darts stuck in his red demonic skin.

******

Actually he is not knocked out, he is just playing along. The darts didn't even pierce his skin enough to reach the blood flow, or what ever demons have there. He fell down on his back when a shower of darts shoot at him, pretending to fall asleep, sensing thoughts of the shooters, that those were sleeping darts.

******

"The specimen is unconscious for now. Your job is to take all needed analysis now and then remove the darts and observe until it wakes up"

There were all sorts of stationary turret type guns pointed at the demon, also a few tanks on standby just outside the glass chamber, aiming at the demon. Everybody was in tension, ready to fire as soon as they get the command.

******

Caymxur grinned at those weapons, but didn't show his amusement.

******

The team started to gather research data from the specimen. A bit of his fur, braking a few scissors in process, only succeeding with a diamond cutter. Also some of his claws, skin and other needed specimens were taken for research.

Heidi was not the only female scientist in the group, and she also noticed that other women were staring at the demons cock for some time while they were gathering specimens.

Then the team left the chamber for the laboratory to research their gatherings.

****** Morning

The team was working all night when they were alarmed that the demon woke up.

It just lied there and looked around, doing nothing.

Heidi asked if she could enter the chamber to attempt a contact with the demon, and was granted permission.

She was afraid, but also she was overwhelmed by what was happening. She would be the first human to contact another intelligent species!

Walking though the glass chamber airlock she stood for a minute watching the demon. It was watching her as well.

"You may approach him slowly" - she heard through her earpiece radio.

She made a step in his direction. Then another one. She walked slowly around him, admiring his physique. Listening how he was breathing and his chest raised up and down.

Then she approached his head and crouched to it. The demon was looking her in the eyes, doing nothing. Also admiring her gorgeous naked body under the protection suit and becoming aroused by her.

She noticed his erection starting to stiffen and gasped out of shock of such a sight. A tremendous huge demon dick was rising up to the sky, pulsating with blood and veins.

She stared at it, mesmerised by its size and also by the demons lust, that was now affecting her lesser mind.

She started feeling warmth and slight tingling... at her anal opening. She was surprised, she never felt that feeling, but somehow subconsciously she felt this appropriate. Her mind was completely controlled by the demon.

She was hypnotised and blurry visions started running inside her hear. Her mind completely faded in the demons lust. The urge to have that demonic cock in her ass up to the hilt was the strongest feeling she had in her life so far. She imagined sitting on top of it and sliding all the way down, the pleasure in her visions was astonishing. Not seen, her anal entranse was spasming a bit and become very hot, almost burning with desire.

Then she snapped back hearing the screaming in her earpiece "HEIDI, FOR FUCKS SAKE, RESPOND!! BACK AWAY FROM THE SPECIMEN!!" As armed men rushed in the chamber and carried her away.

5 minutes after she only started to loose the glass-empty stare she had during this time, still having visions and flashbacks, a result of the demon tinkering with her mind.

She was lying on a couch, and a nurse was swiping her drooling salive from her mouth. The nurse did't know that there was another place drooling in Heidi.

Heidi shook her head and snapped back to normal, as the demon's mind link was broken, when Caymxur assured the success of his intrusion into Heidis mind.

From now on she had only one mission in her life. Nurse conducted that she is perfectly fine and Heidi then was asked a few questions about what the hell happened to her, on what she answered that she didn't know, she just lost track of time and what ever she could make up, wanting for this questioning to be over, as her anal heat still was obstructing her from seating calm.

When she was free she casually walked to her personal quarters, locked the door. Heidi ripped her protective suit from her, revealing her leaking vagina and anus. The air breeze felt orgasmic on her hypersensitive skin this moment.

She knew she need to relieve her lust or it will drive her mad.

She turned on the shower and nervously inspected the shower shelf, to find out a small rectangular shampoo bottle, about the size of her smartphone.

She was a bit upset that it was so small, but still she gushed some of the shampoo on her palm, quickly smearing it over the bottle and her crotch with hands shaking from the enormous lust and mental program that the demon has planted into her.

Then, making no more delays she spread her legs a bit, positioned the shampoo bottle at her anal opening and pushed as hard as she could.

******

A distant scream was heard in the glass chamber that made Caymxur smile. He knew that soon he would take Heidi.

******

Days passed by as the team was researching the specimen. Every day Heidi has seen the demon, refreshing and strengthening all the visions and desire he has planted in her mind. As she was working in the facility, she was patiently waiting for the perfect moment.

The team has made a breakthrough in research - based on demons skin they produced a chemical that appears to be weakening the structure of the demons tissues. They started producing weapons with this reagent, the reagent called anti-demon.

When Heidi casually passed by the glass chamber, as always staring at the demon cock, Caymxur read her mind about the reagent, and thought he had nothing to worry about.

Then work pace became less urgent and more relaxed and routine. Security measures were lowered a bit. Most of the team used the chance to spend weekends with their family outside of the facility. But no Heidi.

Passing by the chamber, Caymxur sensed that today would be the day. Heidi also knew that today would be THE DAY.

Somewhere at midnight she was nervously pacing back and forth at her room, waiting for the clock to struck 02:00 - the time when the guard at the chamber control room usually falls asleep. Today he fell asleep deeper than usual, with the help of Heidi's horse tranquilizer in his coffee.

She looked at the clock - 01:45. She cant wait any more longer. She was wearing only the protective suit, as usual at the facility, naked underneath.

She went out of her quarters, looked a bit around the living quarters finding nobody. Then she went to the lab and garage, also empty. Her smile was sidening and she started feeling heat. She prayed that everything went according to her plan.

She walked to the hangar. Noticed the guard sleeping very tight, she turned off all the cameras in the chamber and all the alarms.

***

Caymxur noticed the red light on the door became green as it unlocked. His shackles also unlocked, he grinned but still laid still just in case. He would not want to sabotage this.

After a minute she noticed Heidi walking in the chamber. She took out her earpiece radio and thrown it on the floor. Caymxur could feel her lust. Immediately he become hard as rock and beyond. Not fucked anything for a week, his cock swelled in size, now measuring at 3.5 inches in width and 15 in length.

By the way, Heidi didn't know that he was unchained now, as he lied still. Single thing she was thinking about now was his demonic enormous cock, that had to be inside her anal cavity as deep as she could take it.

She started to fall into trance like state again by its appearance and the incredible lust radiating through the demons mental energy, influencing and succumbing nearby lesser mind of Heidi.

She stood there mesmerised by the demons lust, feeling as the urge overtakes her completely, her tummy started trembling and legs weaken. Very strange feeling she felt at he anal entrance. Heat and tingling, pulsation and waves of pleasure. She desperately needed to mount that cock.

The carnal energy radiating from the demon and flowing through her body was so immense, that she almost collapsed to the floor. Now completely succumbed to the demons will, Heidis body started walking to the lying demon. Heidi was not controlling her body anymore, she was only observing through her own eyes, as her body crouched to the cock with her back and started grinding it between her butt cheeks, moaning from crazed lust.

The cock was long covered with demons precum, now smeared all over it and Heidis suit.

Heidis body was grinding an enormous demon cock, lusting to feel it inside her ass. When she went down the shaft, she tried to slap her ass against the demon's balls, imagining that she took the whole cock, and the idea was driving her insane. At that moment Heidis mind was beginning to panic, after observing and feeling the length and the girth of the cock. Most shuddering was that Heidi felt everything that her body felt, she somehow understood that her body was not completely animalistically devoted to getting as much of the demon cock in her ass as it could, and that started to frighten Heidi. While the feeling of lust and urge grew in her body, also grew the understanding what she has done. She turned off all security systems, she was now completely alone in the facility. Well, except a small swat team in the other building, but they would never be alerted as all alerts and warnings and cameras are turned off.

Caymxur smiled at that thought of Heidi. "Little woman, i shall take you and you will be mine for eternity. I will possess your body and own your soul till the end of time" - Heidi heard in her head to her horror. This was the first contact that ever happened.

As her body grinded up the shaft, it tried to sit down on the head of it, trying to feel the tip with her anal entrance. The suit obstructing the way, it failed and motioned downwards the shaft, repeating this, raising her anal heat to maximim.

At one moment, the body released almost a crying sob from the urge, stood up, ripped the suit of her completely and thrown it in a corner of the glass chamber.

She was standing with her back to the demon, between his legs, demon still lying on the ground. The demon cock was almost reaching her knee!

Her body now was completely reprogrammed. All basic instincts were replaced by the urge the demon has put in her mind. Heido saw in horror now, as her body positioned her legs on the left and on the right of the cock and crouched to touch the tip with her ass. It started pushing down a bit, gyrating her hips and grinding the tip with her anal entrance. Moaning with urge and desire, she saw her body making attempts to sit on the cock, unsuccessful due to its girth.

Heidi observed as her body put both hands on the cock, stabilising it, pointing at her tight sphinxter and pushing her body down. Gyrating her hips and humping the tip, Heidi felt that her asshole started to give up under the pressure and dilate. Her body started desperately dropping all its weight on the cock, and the tip of the cock head started entering her. When her asshole was dilated about 2.5 inches in diameter, the pain came. Heidi felt it all, and her body too. It shook and grunted from the pain, but continued its desperate attempt to impale itself.

Heidi felt that little by little, her asshole was taking in the head, as the pain tripled with every half of an inch. Tears were rolling from her eyes, her body started gasping and crying out between her desperate grunts, forcing herself on the cock with doubled urge.

At three inches the pain become so unbearably blindning and Heidi understood that she was hurting herself. Physically injuring her anal entrance, as it stretched far beyond its safe limits. Heidi's mind now was fighting hard to regain control of her body, she completely abandoned all the crazy ideas and was now fighting for her life.

Unthinkable mental effort from Heidi's mind caused her body to break her chains for a second and make a step forward to collapse on the ground, heavily breathing, and her asshole spasming from the tearing that has stopped now.

"WHAT?" - she heard firs physical sound leaving the demons mouth. Caymxur was outraged. He slowly stood up, removing himself from the open shackles and throwing them aside.

"WHAT!!?" - gasped Heidi, understanding that in her transe state she also released the shackles locks.

"THERE WILL BE NO MORE DELAYS!" - Roared Caymxur so loud, that the walls of the glass chamber started vibrating. Little did he know that his roar was heard a few kilometers away, also alerting the swat team.

But the swat team needed a least 10 minutes to reach the glass chamber. Anti-demon loaded RPG-7 were grabbed and swat team as on the way. It consisted mainly of male soldiers, but there were a few females also.

This was Caymxur's single mistake made in his plan, but he didn't care now. He was himself engulfed in his lust and outraged, his eyes burning with fire, veins boiling and saliva with white foam dripping from its mouth.

Heidi turned on her back and tried to sprint to the door, but Caymxur's speed was unmatchable. The demon grabbed her by the waist and pinned her down on the floor with her ass up and her face pushed against the floor. Some demonic magic restrained her body and she couldn't move a muscle, laying ass up in front of him completely vulnerable.

"NO MORE DELAYS, I SHALL TAKE YOU NOW!" - roared Caymxur, positioning his hoves near her legs, crouch-lowering himself for the dreaded penetration. Heidi knew that he would not tinker around, she sensed it.

Caymxur held Heidi by the waist with one hand and guided his dick with his other hand, aiming at her asshole.

With a motion that was not so gentle from a demons perspective, but a violent and a brutal assault from a human perspective, roaring Caymxur penetrated Heidi with rage, shoving 10 inches of its demonic cock in her ass in one dreadful thrust.

Somewhere outside the hangar the swat team was breaking through a jammed door, when they heard a desperate soul shattering scream. They knew somebody was in grave danger. Hearing this commander ordered to blow the dor to fucks with c4.

They ran to the glass chamber, finding it locked up from inside. No way they could crack the lock, and stood there observing the scene,

Prof. Heidi was standing doggy style, with her face showing a horrible grimace of pain. The demon was behind her, slowly and steadily fucking her ass. Demon has already extracted all the information from her mind via this bonding, and now he had another goal.

Reprogramming her mind in such a way that she perceived pain as pleasure, Heidi's high pitched screams of pain became lustful moans of pleasure. For her mind, but not for her body. In some time the swat team watched as Heidi started to thrust back, meeting demons thrusts with desperate moans, still full of pain. She gritted her teeth and pushed her hips back, her body desperately needing the pain, as the demon cock was plunging now 11 inches deep in her anal entrance, and then almost fully withdrawing.

The demons precum was acting like a anaesthetic, and also applied some demonic healing to her anal cavity. This allowed the demon not to hold back and fuck her with rage, knowing that she would survive full penetration with the healing magic.

Demon was roaring, and pulling Heidi hard with both his hands on her waist, and Heidi was desperately pushing back. The length of penetration increased steadily, first to 12 inches, slamming into Heidi's anal cavity's dead end with such force, that the remaining 3 inches were bending in an arch, causing Heidi to gasp from pain and dreading the full penetration, but still not being able to fight demons supreme mind, affecting her body.

Then the demon roared: "DO YOU WANT TO CUM, MORTAL?". Heidi screamed immediately: "YEEEEES PLEASSSEEEENGGHH" - meeting another powerfull thrust. "SWEAR YOUR SOUL TO ME, MORTAL". Heidi not thinking a second responded through her gritted teeth: "YESSNGGH, I SWEAR, TAKE MY SOUL YOU MONSTERNGHH!!" - where the "NGHH" parts indicate moments of maximum penetration.

Caymxur grinned, for a moment stopping his thrusts, raised Heidi in the air like a toy puppet. Bending her legs to her breasts and spreading them apart, holding now her by her thighs, she roared and viciously shoved her on his cock, fully penetrating her, slamming his balls against her pussy lips, entering her 15 inches deep, producing a constant agonising scream form Heidi. He would definitely tear her anal cavity without the healing magic with such depth. Not pausing for a single second, he fucked her, withdrawing almost fully and then slamming balls deep, almost whipping her inner organs to a porridge, if it wasn't for the healing magic, now fucking her with all his speed, making about 5 full amplitude frictions in a second, making Heidi desperately roar and sob and gritting her teeth with such strength, that her teeth and jaw started to crunch, with saliva and foam coming from her mouth, her eyes rolled back - only white parts visible, and tears gushing like a river from her eyes. And then Heidi started cumming, so hard like she never came in her life, now completely understanding that she now belongs to the demon.

"HE IS KILLING HER!" - Screamed one of the swat female soldiers, named Julie, rushing to the tank, getting in and shooting the tanks turret in to the glass wall. Glass shattering all over the room, glass debris injuring some of her team mates.

Standing up from the tanks hatch, she watched the hole in glass chamber wall, as smoke was dissipating away. Next thing she noticed was a huge portal opening on the wall just behind her tank and the demon, holding Heidi's limp body in his one hand, rushing to the portal.

"FIRE ANTI-DEMON, done let him get away!", immediately following the command, a soldier aimed an rpg-7 at the demon and pulled the trigger. A rocket launched at the demon, winglets deployed, it was a standart RPG-7 green colored single stage heat rocked, with a conical in front and rounded at the back warhead, filled with anti-demon. 2.6kg and 93mm in its widest part, it propelled at the demon.

Having reached almost half the distance to the wall with the portal, and the tank with Julie just in front of the portal, demon sensed the rocket, shielding with his wing. Explosion. Demon roars and falls to the ground, dropping on Heidi's limp body, with his forearm slamming the ground and by accident her thigh and breaking it just in half with a loud crack.

Swat team watches in fear as the smoke settles down to see a lying demon. A moment of celebration as they understand that the anti-demon reagent is working! Then Caymxur slowly raises from the ground, with a bit of amusement in his mind. The rocket didn't harm him, but it did weaken him.

"Fire another one!" - soldier loads another rocket and aims at Caymxur, while the demon grabs Heidi, noticing her right thigh flailing at a strange angle in the middle, and dashing in the direction of the portal and Julie.

"Must hit the demon for the rocket with antidemon-to explode. The detonator is set to explode on contact with demonic flesh." - thought the commander. "Oh really?" - thought Caymxur. Sensing the soldier pulling the trigger and sounds of the rocked releasing its winglets and igniting the little rocked engine it it. The portal already started to close, its energy weakened by the first anti-demon hit to Caymxur. He could not allow to be hit another time. So the rocked must not touch his flesh. He observed the rocket flight and deducted that he cant dodge it as it was heading directly to the portal. If it hits the portal, it will cease to exist, so Caymxur needed to stop the rocket without touching it. He was some 10 meters away from the portal, and just a few meters away from Julie, watching from the tanks hatch. Caymxur had a genius idea.

What happened next was in demonic super speed. He throws Heidi's limp body in direction of the portal, now having both hands free. Grabbing Julie by her chest, he rips off her bottom part of her swat uniform, revealing her naked athletic legs and butt, crotch and her week old pubes neatly trimmed. Caymxur then spits on her crotch, lubricating it and holds Julie's legs bent and wide spread, her body positioned between him and the rocket. Summoning his remaining power, he slows time down for him enough to position Julies tight-looking ass perfectly in the trajectory of the rocket. Moving her and angling her waist correctly just in time as the rocket reaches Julie. The rocked darts into Julies anus, tearing her sphincter, in a hundredth of a second plunging all the 89mm thick warhead in her anal cavity with a loud "PLOP", so that only the winglets are left outside, the tip of the warhead slams at Julies anal cavity forming a bulge on her muscular abs and the rocket stops it motion, stuck deeply in Julies anal entrance, as all the swat team watches.

"HAHA, DIDNT EXPLODE" laughs the demon, still holding Julie, now shrieking, trembling and screaming from pain.

Caymxur then grabs the rocket end with his mouth and rips it out of Julie with another loud "PLOP", with a grin wanting to yell "Fire in the hole" and to throw Julie at her teammates, but reconsiders, as her better take her with him to the Abyss, having compassion for her and wanted to heal inner cavity later, after all she kinda saved his ass.

He spits out the rocket and hearing Julies renewed agonising screaming, and feeling her convulsions in his hand, he jumps into the portal as it collapses right behind him.
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