Into the Darkness

by The Abyss

Rating: mature
Tags: Sex, Twilight Sparkle, Slice of Life, My Little Pony: Friendship is Magic, Fetish
Length: 5258

Twilight x Tentacles Clopfic - After returning Cerberus to the wall surrounding Tartarus, Twilight finds herself in heat. Fortunately for her, she discovers a rather friendly multi-limbed creature eager to help her with her problem.

When Twilight makes an unexpected trip to Tartarus with Cerberus in tow, she finds herself caught in an unwanted position: She's in heat, and in need of some good release after all the stress Future Twilight's visit has put on her. Fortunately, Cerberus' clumsiness leads Twilight to find some tentacles, who are more than willing to help her with her problem.

Collaboration with TittySparkles

Cover art drawn by JoeyH3 and edited by Selbi
Edited by Jake The Army Guy
Proofread by Knight of Cerebus

Contains: Tentacles and Cum Inflation

Published 2014-01-21 05:50:03 UTC
Last updated 2014-01-21 05:50:03 UTC

Penetrating the Walls

Ugh, how much further do I have to go? Twilight thought irritably as she galloped alongside Cerberus. She was on her way to return him to the gates of Tartarus in the hopes that the wall was still intact. She had no idea why Cerberus had left his position and had gone to Ponyville, so she was determined to find out. Maybe Future Twilight’s problem originates from beyond the walls of Tartarus!

Glancing up, she made sure that the ball that Cerberus was chasing after was still in position. All the way back in Ponyville, she had cast a spell that made it so that the ball would stay a good twenty hooves-lengths in front of the leading head at all times. She was only there to make sure that he would make it back to the wall and so that she could continuously add fuel to the spell. She was afraid that if the spell’s fuel ran out and Cerberus picked up the ball, he might return all the way to Ponyville, eager for somepony else to throw it for him. Twilight could not and would not take that chance; it was much too risky, and everypony was depending on her to succeed.

Twilight silently thanked herself for doing the Running of the Leaves several months back. If she hadn’t learned all about those breathing techniques and about pacing herself back then, she would have ran out of energy long ago. She had been breathing heavily for the past couple hours now, but she wanted to get Cerberus back to the gate as soon as possible. Gauging from the position of the sun in the sky, she knew that she had but a couple hours left of daylight.

But that wasn’t her only problem. She had felt it about an hour after she left Ponyville, and had hoped that it was just some passing feeling, but now she was completely sure.

She was going into heat.

Oh, why now, of all times? Twilight thought as she kept running, the burning sensation between her hind legs starting to drive her wild. Every step made the inside of her legs brush against her swollen lips, teasing them and driving her arousal higher and higher. Thankfully, they were running into the wind, so her scent drifted away from, and not towards, Cerberus. If he caught the scent of me being in heat, I have no idea what he’d do to me… Twilight shuddered, biting her bottom lip in fear.

Another half hour passed, the heat between her hind legs growing stronger every minute. All of her books about hiding and dealing with the symptoms were back in her library, many miles from where she was, leaving her in a bind. She could either turn back now and hope that the spell holding the ball would last long enough, or she could just try and wait it out.

Squinting her eyes, Twilight could barely make out the tips of the gray wall a couple miles away. Sighing in relief, she thought, Perfect! I’ll make sure Cerberus stays at his post, and I’ll be back in Ponyville in no time! Shaking her sweat-filled mane from her face, she put on an extra burst of speed, eager to make it to the wall before she gave in to her desire.

About twenty minutes later, the sun had finally set behind the wall, leaving her just a small amount of ever decreasing light. She was panting heavily now, both from her extended gallop and from the irritating yet pleasurable burn in her marehood. Thankfully, they were now nearing the base of the gates. Twilight slowed down to a leisurely walk and used her magic to toss the ball the remaining distance, letting it settle at the base of the wall to the right of the large, foreboding iron gate.

Sitting down, she wiggled her flank on the ground, trying to itch her burning nethers as she watched Cerberus close in on the ball. “Oh, yeah… Right there…” Twilight moaned softly as she started to grind a hoof against her swollen lips. She closed her eyes and tossed her head back as she started to enjoy herself. Her hoof ran gentle circles around her swollen pearl, finally bringing some relief to her aching nethers. As she felt more of her juices drip onto the dirt, she increased her speed and lit her horn, ready to cast a spell to help her get off and attain at least a small modicum of relief.

Opening her eyes, she saw Cerebus still running at full speed towards the ball. Growing a little concerned, her eyes widened as she suddenly realized that he was going to run straight into the wall full speed.

“Cerberus, stop! Uhh… Halt!” Twilight called out in a weak voice, but it was all for naught. A moment later, she watched in horror as the beast slammed into the wall, making three dull thuds echo in quick succession throughout the area. “Oh no no no… Please let the wall still be structurally intact…” Twilight said in worry as she stood up on shaky limbs, gingerly making her way towards where the three-headed beast was lying limp.

A few minutes later, she walked past the unconscious form of Cerberus and gawked at the full extent of the damage. There was one rather large crack slightly bigger than she was right in front of her. Panic began to creep up on her, but she took a slow and deep breath to calm her nerves. Okay, Twilight, you can fix this… The wall itself was still in one piece, and it seemed to be holding. Taking a few moments to collect herself, Twilight sat down on her haunches and took several deep breaths as she tried to ignore the heat between her legs.

Just as she was was about to light her horn to repair the damage and head home, she saw the crack widen just a little bit. Twilight thought her eyes were playing tricks on her, so she shook her head and looked back up. A moment later, she saw the crack grow ever so slightly bigger. Oh, no… Her eyes widening in fear, she looked back towards Cerberus and noticed that he was still out cold.

Before she could do something to try and revive the wall’s guardian, the crack grew wider and a small green tentacle forced its way through the wall. A few moments later another tentacle appeared, helping the first one widen the opening. As the tentacles slowly but surely chipped away at the hole, a swirling light-blue mist leaked out of the hole, filling the air with an oddly sweet smell.

As Twilight stood frozen in place, she noticed that the air now smelled like honey, and the smell seemed to be coming from the mist flowing all around her. Lowering her muzzle, she took a deep sniff of the light blue-colored haze. Yep, that’s definitely where that’s coming from… Mmm… it sure has been a while since I’ve had some honey... The more of the mist she breathed in, the more she relaxed, her fear melting away in the presence of the calming scent.

The pressure in her legs didn't seem as greedy, and her sweat seemed to slow to a standstill where before it had been cascading along her fur. The tendrils swayed in the wind, her open lips widening at their gesture. Where before she had needed release, now she simply wanted it. Another spray of the blue mist, and Twilight suddenly knew what the creature wanted. Her mind felt very clear. She remembered everything that she had done since waking up, and became hyper aware of the air, the drip of a liquid down the tentacles, and, above all, an awareness of just how lonely her previous times in heat had been. She gave a sigh, then turned to look at the tentacles, which were hanging a distance away from her. They could both sense and smell her need to be fulfilled, and it was more than happy to accommodate her needs in return for a small fee: a night of fun. Twilight kept breathing it all in, unaware that she was falling into a small trance of sorts.

Twilight made to approach the tentacles, an awkward shuffle in her gait. She couldn’t help but imagine what her friends, her mentor, her family would say about this encounter. But that thought of how alone she truly was in these times pushed her on. She just wanted something, somewhere to hold her for once. Even if it was only one night of her life, for once she wanted to share her pleasure with another living thing. Her legs had ceased shaking, and her heavy breathing had slowed down to small pants. She felt unnaturally calm when she should have been panicking. The only thing that held her in place was the fact that she so desperately wanted to be rutted, and that strange need for fulfillment and company she had always buried so deep behind a scholarly facade. As she watched, the tentacles started to slowly wave about in the air in an almost playful manner. They were acting in a non-threatening way, so Twilight didn’t fight back when a few small tendrils gently wrapped themselves around her legs. They caressed her fur soothingly, and even though her mind was screaming at her to turn away, her body was screaming even louder at her to stay and get rutted, to fulfill her desire.

As the tentacles continued to carefully wrap around her, Twilight felt a stray tentacle, much smaller than the rest, slither its way across her lower barrel and to her pussy. Once more she was confronted by a stray doubt, but as the little tendril brushed playfully against her slit, her response came to her with a bite to her lower lip and soft moan. It slowly ran itself up and down her slit, teasing both her swollen lips. The tendril pressed its tip against her entrance and playfully squirmed there for several seconds before it went back to running up and down her slit, softly pressing itself up against her clit.

Twilight’s eyes widened as a bolt of electricity shot down her spine, making her entire body tremble. It was getting hard to stand now, both from being pleased in such a way and from the long trip. Her legs quivered, and she wanted to sit down, but she didn’t do so in the fear that it might make the tentacles think that she didn’t want them. They hadn’t done anything hostile to her. If anything, their gentle yet insistent ministrations were exactly what she had hoped for.

“Do… do you smell the need on me?” she asked, a bit embarrassed that the slimy appendage was touching her where no one else had before. The tentacles moved themselves away from her pussy and rested on her butt cheeks, before giving both a light tap. Twilight took that as a sign that it knew and understood what she was saying. Another part of her wondered if the tentacles would be able to sate her desire. She desperately wanted them to; the phallic shapes were almost made for her needs.

The little vine moved away, and as the tentacles gently tugged on her body, Twilight wondered where she was being led to. A quick look forward at the dark hole from which the tentacles were coming from made her grow slightly fearful.

“Wait, you’re not pulling me into there... are you?” she asked with a shaky voice, causing her captor to stop pulling on her for a moment. One of the vines unwound itself from her front left leg and slid along her body up to her face. It spoke to her voicelessly, trying to tell her it was safe and she had nothing to fear from the unknown. It rubbed her chin, hugged her cheek, and pulled away before it waved at her, beckoning for her to continue on. As she debated what to do, the tentacles around each of her legs let go, giving her the choice to enter of her own free will. She saw the tendrils droop as she cast a glance back, and she found herself drooping a bit internally, too. The tendrils slowly retreated back into the hole, beckoning for Twilight to follow.

“I should probably tell somepony where I am...” Twilight muttered to herself even as her nethers urged her forward. There was no way that she was going to make it back to Ponyville now, and the tentacles were offering her a tantalizing solution to her little problem. “Oh, the things I do to get off...” Stepping forward cautiously, she placed her front hooves on the opening in the wall and peered inside. Complete and utter darkness met her gaze. While that wasn’t totally reassuring, the urge coming from her mind and nethers demanded that she follow the tentacles inside. “Well, here goes nothing… I guess…”

She stepped forward again, and this time there was no pause as she descended into the darkness. Once she was fully in, the light behind her quickly closed off into blackness. She stood in place, quietly wondering if she had made the right choice in trusting the tentacles. As if they sensed her doubt, her new friends came back to her and gently started to wrap themselves around her legs once more. That same sense of security came back to her troubled mind, and she closed her eyes and relaxed. The tentacles gently wrapped around her legs and barrel, massaging her aching muscles and easing her pain. Once they had a firm hold on her body, they slowly lifted her into the air.

For something that lives behind the walls of Tartarus, these vines are rather caring and careful... Twilight opened her eyes to try and see the vines around her, but their green bodies blended in perfectly with the darkness. Being touched by unseeable beings in complete darkness slightly worried her, but the vines seemed to pulse and ebb away her fear little by little.

Twilight had no idea how high they were in the air, so she tried her best to remain calm as a much smaller tentacle–the same one from before–brushed against her stomach and slowly moved down towards her heat. She bit her lip as its smooth end touched the area where her winking clit was, and she let a moan escape as it pushed itself between her lips. Much to her disappointment, it didn’t slide inside her pussy. Instead, it rubbed her outer lips gently in a teasing fashion. At first, Twilight was annoyed as it wiggled between her swollen, soaked lips, but she soon figured out that it was waiting for her to speak, to give it her permission.

“Wh– what are you waiting for?” she impatiently asked as her legs fidgeted in the grasp of the other vines. “Don’t just sit there and tease me… I want you to fuck me!”

Upon hearing Twilight beg for it, the vine lined itself up to her sopping opening and slowly pushed itself in, making her gasp and tense up. The slimy appendage wiggled deep into her flaming sex, letting her warm, wet juices coat it. The pulsing tendril bathed in the juice of her fruit, making it much easier for it to slide in and out. Feeling Twilight tense up, the tentacles in whose grasp she lay started to rub back and forth in a reassuring manner, trying to make her relax.

Before Twilight could start to enjoy the new sensations, the vine slipped back out and used only the very tip of its being to touch and prod her inflamed pussy. It was toying with her, wanting her to get so aroused that she would be begging for it to fuck her. Almost in a licking fashion, the vine circled its tip around her hotness, making her whine pathetically.

Nnng… is– is it trying to find my sweet spot? Twilight thought as it continued to feel her up. “Yeah– right there…” she moaned as the tentacle brushed against her clit. The tentacle paused for a moment before going back to her clit, prodding and rubbing it in a teasing manner. “Ahhh… you seem to react better to words. I wonder… Do you have more vines that could join in?”

A second later, the tentacles around her legs started to slither up her body, moving towards her slit. She felt them pull her hind legs further apart–not too much, but just enough so that she was fully and completely exposed. One of the more smaller tentacles gently wrapped itself around her tail and pulled it back, leaving her plot in plain view. Normally she would have worried about being exposed like this, but nopony was around, so she didn’t mind one bit. The tentacle pinning her tail back wrapped itself around her barrel, ensuring that it wasn’t going to be in the way anytime soon.

A moment later she felt another tentacle brush against her butt cheeks. Before she could utter her next command, the small vine playing with her swollen lips stopped and pulled away, only to be replaced by a bigger one. Wondering what it was doing, she was about to command it to continue when the first tentacle moved to her puckered asshole. Slightly confused, Twilight stayed silent as she felt it just barely slip inside her, teasing her backdoor open. As the new, thicker tentacle at her pussy’s entrance remained firmly pressed against it, she felt the one at her rear entrance inject something warm inside her; no doubt some sort of lube.

Suddenly, Twilight felt another tentacle brush against her face, causing her to look forward and barely make out the outline of the slithery vine. The tip of it tickled her lips, wanting her to open her mouth. A little curious as to how it tasted, Twilight stuck out her tongue and licked the slimy vine, causing it to shake in an excited manner. “Mhm… not that bad,” she spoke as she licked her lips, finding that they had a slightly sweet taste to them. “You kinda taste like watered-down honey, just without the stickiness.”

Licking her lips again, Twilight smiled as she grew eager to taste more of it. Parting her lips, she gave off a soft aah and waited for the tentacle. A few moments passed without it doing anything. Just as she was beginning to wonder what was taking it so long, she felt it prod against her lips, slipping inside her mouth a second later. She felt it explore her, excreting more of that lovely honey-tasting substance. The more she swallowed, the sweeter it became, and the more she craved it.

As the tentacle in her mouth started moving towards the back of her throat, the tentacle at her butt started to apply pressure to her backdoor. It teased her incessantly, only pushing just the tip of itself in before retreating. It repeated that action over and over, letting it get soaked with the lube inside her ass.

With more of her attention focused on the sweet taste in her mouth, Twilight felt more annoyed than anything that her ass was being played with instead of her pussy. She was in heat, so why weren’t the tentacles tending to her desires? Even though she wanted to get rid of being in heat more than anything, having something wiggle up her butt and squirm around freely made her even wetter. Desperate for her pussy to be pounded and stuffed full, she tried to thrust her hips back to penetrate herself on the tentacle poised at her sopping entrance. She felt herself tense up just short of the tip, its edge playing with her in a way that made her wriggle in a futile attempt to break its embrace and end the teasing.

Pulling her head back off the tentacle in her mouth, she swallowed the sweet tasting liquid before yelling, “Gah! Come on already! Fuck me!” The tentacles holding her up suddenly flipped her onto her back, making her let loose a small eep! of surprise. Her front hooves were pinned to her chest, and the tentacle at her mouth thrust itself back in a little rougher than before. It quickly slid all the way to the back of her throat, and another tendril pulled her head back, making it so that her throat was now a straight passage.

Without wasting another moment all three tentacles thrust into her, penetrating her throat, pussy, and ass all at the same time. Her eyes shooting open wide, she moaned loudly around the tendril in her throat as all three tentacles slid deeper into her, going further and further with every thrust. As they settled into a steady rhythm, the one in her pussy started to alternate thrusting with the one in her ass.

Twilight suddenly felt small bulges spread her lips again and again as something was pumped through the tentacle and into her stomach, filling it with a warm liquid. Oh, it’s probably the honey stuff again… She opened her mouth a little more, not wanting to impede the process in any way. The tentacle in her mouth pumped shot after shot of its fluid into her stomach, giving Twilight the necessary nutrients and energy for the many orgasms that she would soon experience over the next several hours.

The feelings that Twilight was experiencing right now were incredible. Every time that the tentacle in her ass slid out and the tentacle in her pussy slid in, she felt them push against the wall separating the two passages as if they were trying to touch, eliciting untold feelings of pleasure within her.

Deciding to just let go, Twilight went limp as she let the tentacles have their way with her. They now no longer needed her guidance and they continuously pumped away into her, finally fulfilling that which she so desperately needed. The tentacles thrusting away between her outstretched hind legs showed no signs of slowing down inside of her. And thanks to how badly she needed to cum, her orgasm was building up rather quickly. All she could do was moan like a proper mare in heat as the sweet sensation filled all her holes at once, and it only got better as another vine sprang up out of nowhere, joining its brother at her slit. This new tentacle waited for the one in her pussy to pull out nearly all the way before it joined in on the fun, and it sure was eager. Both tentacles pressed and squirmed against her sopping entrance as they both tried to slip inside at the same time.

Twilight’s eyes widened as she felt pussy slowly but surely stretch to accommodate the newcomer. As the tentacle in her ass kept pumping away into her, she felt the new tentacle press forward into her pussy, leaving the other one behind. Feeling a bit disappointed, Twilight pouted for a second, but the newcomer quickly pulled out, soaked in her juices. Like before, both tentacles pressed against her entrance and pushed, trying to slip back inside. Twilight moaned as her pussy stretched even more, and a few moments later the two tentacles succeeded, squirming and wriggling inside her.

Ahh! Oh, Celestia! I didn’t think that second one would fit! Twilight thought as she moaned in ecstasy, nearly biting the tentacle in her mouth.

The pumping at her rear started to become erratic as the vines flailed about inside her, doing their best to get the heat-driven mare off. It was starting to become more than she could handle, and she felt that much needed release finally start to swell up deep within her. The tentacle in her mouth suddenly left, making her let off a whine at the empty feeling generated by the sugary appendage slipping away. When she felt it brush against her stomach and move down to where the real action was going on, her eyes widened as she realized what it was doing.

“Wait… I don’t think a third one wi- AH!” Twilight screamed as the tip of the vine nestled against her clit, rubbing it furiously and matching the speed of the vines pumping into her. That was the final straw, everything became too much for her to take. Her body writhed and twisted in the tentacles’ embrace as extreme amounts of pleasure rushed through her. Eventually, she couldn’t hold back any longer, and with a loud shriek, she came.

The vines didn’t cease their thrusting as Twilight’s body spasmed and rocked in an orgasm. Her hot cum soaked the tendrils, making them thrust harder and faster inside of her. “Please… don’t stop!” she begged, not wanting the sweet and blissful sensation of sex to end. “Oh– please don’t stop!”

That’s exactly what they did. For Twilight, minutes felt like hours, and endless amounts of pleasure flooded her sexually deprived mind. The tentacles never ceased, never slowed down for her. They kept giving her orgasm after orgasm, and only when they felt like they had given the mare enough pleasure would they finally do what they had planned all along.

Twilight had lost track of time long ago, losing count of how many orgasms she had had after her fourth one. The tentacles had never ceased their thrusts, but they had varied the speed and the force behind them, switching things up and keeping her guessing what was coming.

After so long, the tentacles were nearing their own climax. They had put Twilight through so many blissful orgasms that it felt that things should come to an end. They increased their pace, thrusting harder and faster than ever before. Leaving her winking clit alone, one of the smaller tentacle slid its way back up to Twilight’s mouth and poked at her lips. Desperately wanting to be stuffed completely full, she parted them, allowing the honey-flavored tentacle back in her mouth. It quickly slid over her tongue and squirted some more of its liquid at the entrance to her throat. When Twilight swallowed, it pushed forward and slid several inches down inside her. It released more of its fluid inside her hot, tight throat to use as lube and started thrusting back and forth.

Just as Twilight teetered on the edge of yet another orgasm, another tentacle rose from the darkness and wrapped itself around her lower barrel. It tightened its grasp, showing Twilight that it was the one in control, making her feel slightly submissive. The tentacles holding her hind legs spread them apart even further, and the one in her throat increased its pace, eager to get her off.

A few moments later, Twilight felt the tentacle around her barrel slowly but surely slide down towards her hind legs. She prayed that it was going to her clit, because all she needed was just that one little push to make her fall into another blissful orgasm. All four tentacles had been pumping away at her all while the new tentacle was teasing her. It was as the tentacles wanted her to beg for it, but Twilight’s mouth and throat was stuffed full.

“Mmphm mmph cmm!” Twilight tried to say around the tentacle in her throat, utterly failing in her attempt to say ‘Make me cum’. Thankfully, the tentacles seemed to take the hint, and to her disbelief they started fucking her even faster and harder. The new tentacle suddenly wrapped itself around her throbbing clit, rubbing against it for the grand finale.

Twilight’s mind just about exploded from the sheer amounts of pleasure that flooded it. She cried out as loudly as she could around the tentacle in her throat as her entire body bucked and shook in her orgasm.

Right as Twilight came, so did the tentacles. They shot load after load of their cum into Twilight, filling the mare up with their juices. The tentacle in her ass pumped so much of its hot liquid up Twilight’s ass that it slipped past her rectum and into her intestines, quickly filling it up. Moments later, Twilight’s entire rear passage was completely full of cum, and she couldn’t get enough of it. The tentacle in her throat had stopped thrusting, choosing to pump the mare’s stomach full of its cum, to the point that it had started to swell. As her stomach ran out of room, the cum started being forced up Twilight’s throat and out of her mouth. The tentacle, not wanting to drown Twilight in cum, quickly pulled out and let the rest of its load shoot onto her face and neck.

Twilight moaned loudly as she felt her stomach start to expand. After years of relieving her stress in a dusty corner of her bedroom, at last she truly felt the warmth of something wanting her spread throughout her body. The tentacle rubbing her clit had kept her in a perpetual state of orgasms, giving her one right after other, never giving her a chance to relax.

The tentacles in her pussy had stopped thrusting as well, keeping their heads pressed firmly against the furthest recesses of Twilight’s pussy as they came. They shot burst after burst of their cum inside her, filling and expanding Twilight’s womb as they quickly filled it up. They formed such a tight seal in her pussy that almost none of the cum leaked out, making sure that it was all kept inside. The tentacle rubbing against her clit sent her into yet another orgasm, sending her overexerted body well over the tipping point. Her mind completely overwhelmed by the sensations and her exhaustion, Twilight fainted, falling limp in the tentacles’ embrace.

A minute later, all three tentacles between her hind legs slowly stopped cumming, leaving the unconscious mare completely filled with a cocktail of their cum and hers. As the tentacles slowly and gently slid out of her, a massive torrent of cum flowed out of Twilight’s holes, soaking the ground in a huge puddle of mixed fluids.

Reopening the crack in the wall, the tentacles gently deposited the spent mare on the other side of the wall before repairing it, making it look like it had never been broken before.

Sunlight hit Twilight’s caked and sweat-drenched face with the crack of dawn, waking her up. Stretching herself out, she rolled over and found the dried remains of the sweet fluids from last night. Her eyes widened in confusion, before narrowing and looking at the ground as she tried to remember what happened last night.

Lifting a sticky hoof to her muzzle, she took a deep whiff of the substance covering it. The sweet smell sparked her memory and she remembered all of the blissful sensations that the creature had given her a few hours ago. A wave of shame enveloped her as images of what happened last night flowed through her mind. She couldn’t imagine what her friends and family would think of her if they ever found out. Twilight stood up, suddenly realizing that the burning heat in her nethers was gone. A moment later, she found a small smile creep across her face, along with an accompanying blush.

Sheepishly, she slunk away into the breaking dawn as she looked back at the wall with a twinge of regret, knowing that she would never be able to have an experience like that again.