Chapter 4: Sanctum Of Sin

HELICARRIER

5:24 PM

-

"I trust the briefing documents proved sufficient agent Romanov?", inquired Director Nick Fury as he sat in his desk within his office aboard the helicarrier, before him stood the beautiful red haired agent Natasha Romanov better known as Black Widow, "Your orders are clear director Fury, however this mission would be easier if the other Avengers were able to assist me", remarked Natasha as she finished studying the details of her mission, as the number of missing people rose higher and higher S.H.I.E.L.D and its agents were compelled to do something to stop it since the Avengers were having no significant luck.

"I understand agent Romanov but you need to realize that the Avengers have proven to be uncooperative with us in the past, while you may be a member you are still a S.H.I.E.L.D agent first, although we did get an Avenger to accompany you on this operation if she was willing to follow orders", explained Fury as he leaned forward in his desk and pressed a button on the computer console, the door opened and a graceful figure entered, her blonde hair and form fitting suit were the stuff of many fantasies held by young horny members of S.H.I.E.L.D Natasha rolled her eyes upon seeing it was her rival Barbara Morse, better known as Mockingbird.

Mockingbird

"Hope I'm not interrupting anything, cause if I am then I'm gonna ask if I can join", commented Mockingbird playfully and flirtatiously causing Natasha to roll her eyes, ignoring her comment Fury motioned for the graceful figure to approach his desk, once both heroines stood before him Fury spoke once more, "Do you know the details of the mission agent Morse?", inquired Fury to which Barbara tapped her index finger against her chin in a playful manner before replying, "Vaguely, me and Widow here go looking for several missing people and Spider man within the sewers and be back in time for tea".

Snorting Fury gave a mildly annoyed glance to Barbara before leaning back into his chair, "Thats pretty much it, Widow will be in charge of this mission so follow her orders and don't take any risks, there might very well be civilians involved here", declared Fury as Natasha nodded in acknowledgment, "Consider it done sir", she said in her usual thick Russian accent to which Fury nodded and wished them both good luck as they left the room and into the Helicarrer hanger in order to prepare for the upcoming mission, Natasha was known for being calm and collected but deep inside she was concerned as if the kidnapper could overcome Spider-man then they could easily overcome Widow and her team.

_

New York Water Treatment Plant

Two Hours Later

"Alright ma'am we've got the comms checked out and everything looks good", reported agent Vickers to Black Widow who was looking over a map of the sewers with Barbara who stroked her chin while her amused gaze fell on the electronic map, currently Widow and Mockingbird were inside a large S.H.I.E.L.D armored transport vehicle that was parked outside the New York water treatment plant which controlled access to the sewer system, within the vehicle were a squad of armed and armored S.H.I.E.L.D agents who were going to accompany Widow and Mockingbird.

"Good to hear Vickers, go ahead and take your post at the comms set", ordered Widow as she turned off the electronic map and turned to her team, Natasha gave them all a reassuring look and stepped before them before speaking, "Alright team, our mission is quite simple, search every nook and cranny of the sewers until we find something, stay together and keep within radio contact and we'll be fine", she said in an authoritative manner to which the agents gave a salute indicating their affirmation, Mockingbird rolled her eyes at this and turned to agent Vickers who she caught gawking at her ass which was highlighted thanks to her suit.

With a blush on his face he turned away only for Barbara to approach swiftly and whisper into his ear suggestively, "Don't worry kid, I like it when guys stare at this ass, when I get done you and I have some checkups to do in private", she said before licking his ear and going over to the team, Vickers mouth was agape at this and felt an erection form at the prospect of sex with her, once the team was ready Widow rallied the squad of agents and exited the armored car the night sky was cold and a few rain drops could be felt, once the last agent had exited the transport vehicle Mockingbird closed the sliding door with a wink to agent Vickers.

"So how do we know the kidnappings are happening in the sewers?", asked one agent as the team hastily advanced through the water treatment plant, the plant was closed off after the entire staff had disappeared one day and no one knows who or what kidnapped them, "When our team investigated the apartment building where spider man first went missing we found traces of an unknown entity from a large pipe that led into the sewers", explained Mockingbird from the front of the group, the team with Natasha and Barbara at the front made it to the entrance to the sewers.

As the team turned on their flashlights attached to their helmets they smelled an unusual aroma, "What the hell kind of smell is this? it smells......sexy", remarked Barbara with a look of desire on her face as she was certainly not expecting the scent of a sewer to be so alluring, while Natasha smelled it as well she had better discipline than Mockingbird and thus rolled her eyes, "Focus agent Morse, we have an investigation to preform", reminded Widow as Barbara focused her gaze and sighed in mild annoyance, "Gotcha miss joy kill", she replied before walking with the team of agents into the sewers.

As the team advanced into the dark and damp sewers they noticed that the water flowing through the canals was unusually clean, normally it would be filthy but the waters were clean and had a strange glow about them, "Whats up with the water, isn't this kind of water supposed to be dirty?", inquired an agent as Natasha observed the water before ordering an agent to take a sample of the liquid, "This water will make the egg heads in the lab busy", commented the agent as she put the vial of sewer water into her pack, "Well lets keep on going, we won't find any missing people or a spider-man by sitting here", remarked Mockingbird.

Nodding in agreement Widow and Barbara led at the front of the group and continued onward, the farther they got into the sewers they noticed that not only did the seductive aroma increase they saw black slime covering the walls, floors and ceiling, slick tentacles spread the slime further and seemed to pulsate as if they were alive, the agents all looked at this alien resin with a mix of awe and nervousness while Widow narrowed her eyes, "Lovely whatever this stuff is it sure as hell isn't human", commented Mockingbird as she kneeled down and touched the slime on the floor.

While Widow gave orders to the other agents to gather samples Barbara felt the warmth of the slime and couldn't help but feel relaxed by its touch, even through her form fitting suit she felt its warmth and noticed that it was moving somewhat, smiling with a mix of lust and curiosity she wanted to see where this stuff was coming from, "Hey Natasha don't you think it'd be faster for our search if I went on ahead with a few agents while you did your sampling?", suggested Barbara to Widow who listened and thought about her proposal.

"Very well but keep in radio contact, we'll catch up to you soon", said Widow as Mockingbird nodded and motioned for a few other agents to follow her deeper into the slime covered sewers, placing her finger to her earpiece Natasha spoke to agent Vickers through the comm, while Widow remained with most of the unit Barbara advanced ahead with two other agents, they had to trudge forward as the slime stuck to their feet causing them to slow down, "Hey this crap is really sticky, what the hell is it?!", complained an agent who grunted as he pulled his feet from slimy floor.

""Keep it down will you, we have to maintain silence or else we'll loose the element of surprise", ordered Mockingbird to the two agents following her, they nodded as they followed her further until they heard a the sound of slime and tentacles behind them, darting their gaze around they saw that a barrier of tendrils and slime had formed behind them effectively cutting them off from Widow and her team, "What the hell is going on here!?", panicked one agent before the tentacles on the ground slithered around their legs rapidly and pulled them deeper into the sewers, Mockingbird would have tried to help them but she herself was wrapped in the slick tendrils that withered over her body's curves.

"Oh Fuck!", yelped Barbara as she felt a tendril slide in between her ass cheeks while two others coiled around her breasts, she should be trying to resist but instead she dropped her weapons and batons and opened herself to the slick, warm tentacles groping her body, "Yes keep going, fucking slide in my pussy and-", before she could finish a tentacle slid into her mouth and slithered into down her throat, she gagged in response before her eyes rolled into the back of her head from the pleasure, meanwhile the symbiote tentacles began to dissolve her suit and thrust into her ass and vagina causing her to gag in bliss.

As Mockingbird was being fucked by the symbiote tentacles a dark figure approached from the shadows and chuckled as he saw the S.H.I.E.L.D operative become a **** to the pleasure of the symbiote, "Truth is Mockingbird you never had the element of surprise but we don't think you care about that do you?", remarked a venomized Miles Morales as he stroked his slick symbiote cock, once Miles was bonded to the symbiote his body grew taller and stronger, motioning his hand Miles had the tentacle in Barbara's mouth slide out as he approached her and gently grasped her head in his hand.

"We are very happy you came here, especially with Black Widow, will you help us get her into our hive?", asked Miles with an alien effect to his voice, ordinarily Mockingbird was loyal beyond belief to S.H.I.E.L.D and her comrades but right now with the symbiote slime corrupting her mind and the pleasure of slick tentacles groping and fucking her Barbara would do anything to keep being fucked, "Y-yes I-I'll do a-anything just f-fuck me please!", begged Barbara as Miles gave off a chuckle before kissing her, she moaned softly into her mouth as she was kissed and submitted to his long tongues **** upon her.

Once Miles was done kissing Barbara he picked her up and carried her deeper into the hive to be bonded.

_

Black Widow's Team

"Hey Widow do you hear us? come in!", said the voice of Mockingbird through Natasha's earpiece, halting her teams advance Natasha replied quickly, "This is agent Romanov what's wrong?", spoke Natasha as she listened to Barbara speak, "Our team has been attacked and we're alone up ahead, please hurry!", urged Barbara over the comms, looking to her fellow S.H.I.E.L.D agents Natasha motioned them forward with a hand gesture as they continued ahead as fast as they could go with the black slime covering the sewers, not once did Widow even stop to consider why Barbara was using "we" and "us" as she was too focused on making certain everyone was fine.

Soon Widow and her team passed a corner and saw a shapely figure ahead, the figure was clearly female and appeared to be naked but her form was slimy, "We're so glad you could make it Natasha", said the voice of Mockingbird only now it sounded alien, behind her came the sounds of a orgy as loud moans of pleasure and sex could be heard, several agents felt their lust reach its peak and many began to shake with desire due to the symbiote pheromones and the sounds of sex, "Who the hell are you!?", demanded Widow as she raised her weapons at the figure.

Giggling the figure approached, her thick hips swaying and her massive breasts jiggling with each step she took, the male agents gulped as they felt pre-cum leak from their erections, once she was close enough her symbiote face retracted and the beautiful face of Barbara Morse was revealed, "Like our new look Natasha, you and every human on the planet will look just like this very soon", she said with a smug smile as Natasha held a look of confusion on her face while remaining steadfast despite her desire, "What happened to you Barbara?", inquired Natasha before she heard her agents yelp briefly before they went silent.

Turning around rapidly Widow saw her team wrapped up in symbiote tentacles and her mouth was agape as she saw them not even attempting to resist as their mouths were invaded by slick tentacles, "See what we mean Natasha, humans love sex and pleasure while denying themselves it, we symbioses will change that for the better, soon every human city will look just like this, slime and tendrils wrapped around buildings and streets, people bonded and gifted with bodies like these!", proclaimed Mockingbird as she rand her hands over her slimy hourglass body in front of Natasha.

"I-I won't allow it you've been corrupted!", yelled a defiant Natasha before attempting to strike Barbara, amused Mockingbird easily dodged the move thanks to the symbiotes power and reflexes while Natasha's feet were stuck to the ground, "Naughty naughty, seems like you need a taste of what we offer", commented Mockingbird as the symbiote covered her face again, her long alien tongue licking Natasha's face as tentacles held her arms in place but didn't enter her mouth, "Good to see you Widow, we were hoping S.H.I.E.L.D would come soon", said a deep alien voice from behind Mockingbird.

Turning her gaze to the source of the voice Natasha saw a tall and built figure approach, his powerfully built body was amazing and his thick erect cock made Natasha feel the temptation to give in increase, "You see with an agent as high ranking as you we'll be able to infiltrate S.H.I.E.L.D and spread to the helicarrier", explained Venom as he stood over Natasha as she gawked at the figure before her, she tired to putout words but failed as all she wanted was to be plowed by that slick cock, chuckling deeply Venom motioned his hand and the other agents were pulled by the tentacles back into the heart of the hive to bond.

"When we were Peter Parker we had so many fantasies about fucking you, now its about to become a reality", remarked Venom as he leaned down and kissed Widow, as he did so Mockingbird giggled as she watched the stone cold agent Romanov fall apart in Venom's arms, a part of Widows mind was screaming at her to resist or do something but it was too late, now she was giving in as Venom began to unzip her form fitting suit to reveal her amazing naked body, "You'll look amazing when you'll bond", said Venom as he lifted Natasha into his arms and carried her to the center of the hive whilst Mockingbird followed.

With her vision becoming dazed with pleasure Natasha tried to make out her surroundings and what she could see was beyond anything she could have expected, a massive chamber completely covered in slime and tendrils with countless symbiotes engaging in a massive orgy with each other, the smell of sex and symbiote slime was overwhelming her nostrils causing her to drool almost as she felt her body shift in Venom's arms, now facing him she wrapped her legs around his slick waist and moaned in blissful pleasure as she felt his cock glide into her pussy.

As Natasha felt Venom pound her vagina she could barely hold off an orgasm as the pleasure she was receiving was almost too much, feeling his powerfully thick cock thrust into her was amazing as no man she had ever had sex with before was able to make her feel this way, "OH YES KEEP GOING I NEED TO CUM!!", cried out Natasha as Venom increased his speed in response, "It'll be our pleasure!", he commented as his tongue licked her breasts and neck as he gave her one final powerful thrust, feeling her pleasure reach its peak Natasha screamed in delight as she orgasmed around Venoms cock still inside of her.

"Oh yes, I-I love it, p-please give me m-more pleasure!", begged Natasha as any resistance she had left in her totally crumbled, feeling pleased with himself at fucking away Black Widows ice queen persona Venom nodded as he released her from his grasp after pulling his cock out of her, "Go to the pod, it will bond you with one of us and you will be reborn!", he assured as a pleasure drunk Natasha walked over to the symbiote pod in the center of the hive, she had a look of pure happiness on her face as her mind was totally corrupted by the symbiote.

Once she was in front of the pod it opened and its tentacles quickly wrapped around Natasha's naked body and pulled her inside, once she was in she was quickly drenched in slime and felt tentacle invade her body from the mouth, ass and pussy as it quickly bonded with her, with her desire to resist already crumbled Natasha opened herself to the pod and began moaning loudly with bliss as she was gradually reborn a symbiote, once the bonding was done the pod opened and out came a gorgeous hourglass figure, with massive breasts and expanded ass cheeks Black Widow was no more.

_

S.H.I.E.L.D Transport Vehicle

One Hour Later

"Agent Romanov come in! where are you!?", yelled agent Vickers into his comms set within the transport vehicle, it had been over two hours of no radio contact with the team sent into the sewers and he was beginning to grow increasingly concerned, Vickers was about ready to call the Helicarrier for backup when he heard a knock on the vehicles sliding doors outside, surprised by this Vickers stood up and walked over to the doors and opened them from the inside, as the door opened he saw Mockingbird and Black Widow standing there but no other members of the team were there.

Furthermore they were different, their breasts were huge and their bodies had an hourglass shape to them with curvy hips and plump asses, "I-Its good to see you both but where is the rest of team and what happened!?", inquired a flabbergasted Vickers whilst trying to not get an erection from their massive "assets", the two said nothing as they stepped into the vehicle and closed the sliding door behind them, "Are you both okay?", he asked in concern only for Mockingbird to smile as she approached him and pulled him in for a kiss.

He initially tried to pull back but soon gave into her kiss as he wrapped his arms around her voluptuous body and slid his hands up and down it, meanwhile Black Widow walked over to the communication set and typed up a message reporting an all clear to the Helicarrier assuring them that there was absolutely no missing people in the sewers, meanwhile Vickers was so focused on his kiss with Mockingbird that he didn't notice pitch black slime over her body until his hands felt a slick naked body, opening his eyes he saw that Mockingbird looked like she was naked but her skin was black slime.

He tried to pull back but he felt her long alien tongue go down his throat feeding him symbiote slime to corrupt his mind and make him a **** to their pleasure, once he had ingested enough Mockingbird finally pulled away and Vickers fell to the floor of the vehicle, "W-what the h-hell did you d-do to me?!", he asked as he felt his mind fail to make any cognitive thought other than how badly his cock needed to be pleasured by Mockingbird, "You can't resist us Vickers, just take off that suit and let us fuck you", ordered Natasha from behind in an alien sounding Russian accent.

Quickly turning his head around he saw Natasha was the same as well, her body was pitch black and slimy causing Vickers to gawk at their beauty, he was already horny but this was too much, he knew he had to do something and stop them but his mind was already being coated in symbiote slime, "Go ahead, we won't even try to stop you from calling in to the Helicarrier, but if you do that you'll never get the chance to have such blissful pleasure like what we offer", said Mockingbird as Vickers stood up and looked to the comms set, he knew what he had to do and he made his move!

Vickers kneeled down before the venomized Black Widow and shoved his face in between her massive slimy ass cheeks, the temptation was too great and his lust was undeniable, both Widow and Mockingbird laughed as he licked Widows symbiotic pussy, "You made the right choice Vickers, now relax and enjoy the pleasure we have to offer", she said in a congratulatory manner as Widow moaned in delight from his tongue, soon she pulled his face from in between her ass cheeks and with the help of Mockingbird tore off his suit, now naked Vickers laid on the floor of the vehicle as Mockingbird sat on his face whilst Widow rode his cock.

As Vickers gave off muffled moans of pleasure from underneath Mockingbirds ass she kissed Widow passionately while she bounced up and down on his erect cock, the sounds of her fat slimy ass slapping against his naked waist filled the vehicle as Vickers soon shot load after load into Widow and Mockingbird over the course of their threesome, eventually he was bonded like all the others when the two female symbiotes wrapped him in tentacles and he was cocooned, with the seduction of the strike team to the symbiote S.H.I.E.L.D has lost two of its most valuable agents whilst the symbiotes now have access to the Helicarrier and large enough numbers to spread to the surface.