Spike walked into the townhouse he and Twilight shared with a tired groan as he slipped his bag off from over his shoulder and tossed it off to the side, "That's so much better... Man, Mrs. Harshwhinny's been riding us harder than ever over this upcoming test. And definitely not in the good way." he said with a sigh before grinning, "Speaking of a good ride..." He stripped his sneakers, socks and jeans off and proceeded to toss the abandoned clothing into his room, turning to go before stopping and tossing his underwear into his room as well and shutting it as he ran back downstairs and into Twilight's lab area.

He leaned out from behind the wall near the stairs to make sure she was alone and was pleasantly surprised to see the beautiful scientist working on something and completely bare of any and all clothing save for a pair of goggles over her eyes and a surgical mask over that, as well as a bikini top. Not sure what from how far back he was but it was definitely something she was paying all her attention to it. She was bent over a table of different chemicals and the like, bouncing her sweet, squeezable backside in ignorance of Spike's presence. Spike chuckled as he snuck over towards her, tiptoeing his way behind before reaching his hands out and quickly taking her breasts into his grasp before she squeaked and dropped a pair of test tubes that then both landed into a beaker that began foaming and bubbling up.

She groaned and turned her head to look at him, "Spike~!" She shouted sternly as he chuckled nervously. Before he could apologize the two had their attention stolen by the rapidly bubbling beaker before them, "... Well that can't be goo--" Twilight was interrupted as she was proven quite incorrect by being covered in a bright green goo all over her, Spike protected as he crouched slightly behind her. Coming back up slowly, Spike was met by a glaring, goo-covered Twilight who was in no way happy to see him. Seeing the look on her face, he chuckled nervously and began backing up with his hands held up in surrender to the angry scientist before him.

Spike groaned laying in his room staring at the ceiling, still completely bare of any pants or even underwear as he lay with a half-mast member. Twilight obviously wasn't in the best of moods at the moment and he knew when to keep to himself or out of her way, and right now was definitely one of those times. He sighed in disappointment as he took hold of the twitching dragon between his legs and gave it slow, even strokes as he gave a sigh, using his free hand to search through the web for something to get him off. 'Hentai? Nah, not today. Incest? Nah, it's obviously fake. Ponies? Who'd jerk it to ponies?' He thought as he kept flipping through categories before he landed on futa. He arched his brow in confusion, having never run into that one before as he opened it up and was surprised to see videos of girls with his kind of package ramming guys and girls alike, or even each other. It was weird but he found it oddly... Hot.

He licked his lips and began stroking with purpose as he watched the video, a hungering look in his eyes as he watched a guy be slammed against the wall by a well-endowed woman with a grin before he was pushed into, making him moan out in pleasure. The woman was really giving it to him, plunging his ass with all she could, holding his arms behind his back as she rammed him. Spike grew harder and harder watching this as he stroked harder, wanting so badly to release, envying the guy in the video before he heard a shout of his name from Twilight. He groaned and shot up out of bed rushing to the door and pausing the video as he tossed the device to his bed and rushing out.

Running across the hall to Twilight's room, he pushed through the door abruptly, "What is it Twi--Whoa!" he shouted midsentence as he was met with, what he could only put as, a shocking scene. Before him was Twilight with a big, twitching cock similar to his own. She had a blush on her face and a stern look on her face, "T-Twilight... You have a--"

"Yes, Spike, I am aware of this big twitching anomaly connected to me, thank you for reminding me!" She shouted back in irritation as she groaned and fell back, "I believe it might be because of the concoction that exploded on me earlier when you so abruptly surprised me." she said with venom dripping from her words as she connected eyes with him in a glare as he scratched the back of his head nervously, "But now, I have this thing to deal with!" She groaned before shooting up off the bed, I have to get to work on getting rid of this dumb phallus." she said as she began to push past him.

Not paying proper attention to it she brushed a bit against Spike's own member as she got in his face and pressed a finger to his chest, "Do. Not. Interrupt me." she said before walking past only to have him grab her hand.

"Whoa whoa whoa, Twilight, wait!" he said as she turned to look at him again, a flustered look on his face as he looked to her cock and chuckled, "W-Well, you can't possibly work with that big thing distracting you the way it is."

"I suppose... What are you getting at, Spike? I can't possibly bother our friends about this! I most definitely will not ask any of them to--"

"Nonononono! You won't have to bother any of them!" he said as he blushed and slowly turned and showed of his ass to her, shaking it for her to take a good look between his cheeks and at his puckered star, "Maybe, I dunno, I could uh... 'repay' you for earlier~?" he said with a grin.

Twilight's face turned a deep red as she stared at it, her member reacting in turn and flexing as she grew a bit closer to it, only to back away, "No! A-Absolutely not, Spike! I-I, uh... Appreciate you trying to help, but that's most definitely out of the question! Now if you'll excuse me, I have to get to work on solving this dick-lema-- I mean dilemma!" She said blushing in embarrassment from the accidental pun she'd made as she covered her face and dashed away down the stairs to her lab.

Spike groaned as he turned back around and watched her run, "I will get that thing in me somehow, Twilight Sparkle... Just you wait..." He said as he tapped his fingertips together in a villainous fashion as he grew a scheming grin upon his face.

Twilight ran around her lab looking for any kind of hints on how this could've come to pass, or how it was even possible to have happened so quickly in just a matter of hours for that matter. Though as she walked it didn't help she wasn't used to working around something like this, knocking beakers off her desk and hitting it on things with pained groans or curses quickly following. Upon coming back to her experimentation table looking at a clipboard she felt it suddenly push into something and, with a groan, looked down to see that she'd accidentally pushed it into a knocked over boiling flask. Giving an angered growl, she placed the clipboard down and began tugging on it, trying to pull the bottle off withing breaking it, blushing a deep red at the situation she was stuck in quite literally.

She finally got somewhere when she began twisting the bottle and gasped upon receiving a sudden wave of pleasure that shot through her cock, biting her lip as she decided to turn it again, groaning from the tightness around her as she began pulling and twisting at the same time, sitting down in her computer chair as she began pulling it up and down harder, leaning her head back with slight gasps and groans.

She bit her lip as she felt a build-up forming in her loins before stopping and pulling the bottle away, 'What am I doing!? I need to get this figured out soon before I ruin all my equipment... Or embarrass myself further' she thought with a sigh as she placed the bottle in a nearby sink. She tuned her chair to face her station only to see Spike bent over, still completely bare, as he waved his oddly pluml ass back and forth, looking over Twilight's fallen clipboard before he turned to look at her.

"Oh, hey Twilight. I saw you were having some fun so I thought I'd help out." He said as he looked around the table, "So where's the chemicals?" He said as he bent down on all fours and began looking through shelves beneath her workstation, his ass firmly puckered and in plain view for her staring satisfaction. She drooled a bit staring at his backside with lustful intent, her aching, pulsing erection not assisting in her efforts to ignore it as she gulped and walked over.

She reached over him and pressed a button on a cabinet that opened up with a partial cold mist, revealing the chemicals that she used for experiments, "They're right here Spi--" she paused when she saw Spike's ass pressed firmly against her shaft where he was positioned, shaking it back and forth against her sensitive staff. She groaned and let him for a little bit, leaning her head back in a dazed state, 'Is... Is this what guys feel? It's... So good... Wait, no!' she thought as her blank mind finally reinstated control as she pushed away from him, "Spike, please! I need to get this thing under control so I can get rid of it for good!" She said as she began looking through the chemicals cabinet.

"Come on, Twilight! You can't possibly work with that thing slapping and bumping into everything. Not to mention with someone so willing to help~" he said as he leaned over the workstation and gave his taught ass a smack, Twilight watching it jiggle as her shaft twitched to life, harder than ever watching him give it a good shake for her awaiting, hungry eyes.

She bit her lip and blushed as she looked between her cock and Spike's ass which had a bit of a red hand mark where he'd given his ass a wallop, licking her lips as she came up to him and pressed the head to his puckered hole, "Fine... But only so I can relieve this thing and get back to work, okay? N-No other reason."

"Whatever you say, Twilight... Make sure to put it in deep~" he said as she blushed darker and gave a quick nod before sliding her insatiable shaft into Spike.

She went deeper, and deeper, and deeper still until she felt it tighten beyond anything she thought possible, Spike groaning in painful pleasure as he gripped the workstation hard, "W-What do I do?" She asked worriedly, scared she'd hurt Spike or just not be good enough before she felt one of his hands on hers that was firmly gripping his ass.

"Don't worry... I'll, ugh~ T-Talk you through... Okay?" He said looking back at her with a blush of his own, holding his reassuring smile through the aggressive amount of pleasure and immense pain. Seeing this, Twilight gave a nod and awaited his instruction, "Alright... Now, grab something to lube it up or something. It'll be easier on both of us." He explained through gritted teeth.

"A lubricant, got it." She said as she pulled back a little quicker than Spike would've liked as a yelp came from him, leaning over the sink as he slammed his fist to the table itself. Above him, Twilight searched for anything useful before finding a hand lotion. It was a bit high so she had to go forward a bit which meant shoving herself deep back into Spike, making him groan out in pain, Twilight groaning in pleasure as she grabbed the bottle and leaned over Spike who twitched with his tongue lulling from his mouth, his eyes rolled back as his ass squeezed tightly on Twilight's log, "G-Got it... What now?"

Spike wobbled a bit before he got back onto his forearms, still bent over by his nervous girlfriend and caretaker, "Okay... Pull out slowly and use whatever you got on your dick. Squirt some on, rub it all over and then try to push back in... And I can't stress this enough: go slow." He said sternly as she nodded and took her time pulling out from his tight cavern, squirting the lotion all over herself as she then began rubbing it all over before an idea popped into her head.

She stopped her rubbing and retook her firm hold on Spike's butt, "Uh... Twilight? What're you do-- ING!?" he shouted as he was forced into by her partially lubed penis, the pain outweighing the pleasure as he could feel tears rolling down his cheeks, Note to self: Never ask for Twilight to fuck you again... She's awful at pegging.' He thought as he panted to regain his lost breath that was just railed out of him.

Twilight, on the other hand, was basking in the smooth, soft heat of Spike's tight ass, moaning as she could feel his very heartbeat pulsing around her shaft as she leaned over and hugged him tight around his waist, pulling back and pushing back in as she thrusts like a dog in heat, "I need more, oh my gosh, Spike~! Why didn't you tell me things like this felt so amazing? So wonderful!?" She asked through grunts and moans of abundant pleasure, feeling her cock disappear in and out of Spike's hot, ravaged asshole.

Spike was in excruciating pain before but as his railing went on, he grew more and more fond to it, backing up into her thrusts as he groaned in pleasure, gripping the table as he was plunged into as hard as she could, spreading his legs a bit more like he'd seen in the video as he leaned his head back and closed his eyes, panting and grunting before he felt a hand gently wrap around his neck and tilt him backwards a bit as Twilight was seen over him, bigger than he'd remembered as he looked up at her in bewilderment, "T-Twili--" he was cut short as the bigger scientist kissed him deeply, spanking his ass as she continued to impale his ass repeatedly, her thrusts more melodic and powerful as he moaned and panted with need into her mouth.

She soon pulled out and turned him around, sitting him on her workstation as she then slammed back in with great force, making Spike cry out in a desperately pleasured tone as. He wrapped his arms and legs around her while bouncing over and over on her much bigger cock. Being lifted up as she took a strong grip on his ass once more, pulling him up and down into her thrusts. He couldn't hold back anymore as he let moans and cries of pleasure free, blowing loads of his own thick cum all over the both of them, covering her breasts and stomach as well as his own chest.

Twilight grinned as she pushed him down on what he could've sworn was once the workstation but was now her bed as she spread his legs wide and put him into, what Spike had heard be called on the internet, a mating press. She thoroughly railed his ass deep and hard, her cock bludgeoning his insides like a sledgehammer to a nail. His eyes rolled back in ecstasy and his tongue hung from his mouth as all that escaped him were weak yelps and grunts as well as the words, "Cum" and "Harder".

She must've heard him extremely well, because she picked up the pace and gave him something to yell about as she screamed out in ungodly amounts of pleasure with him, the two covered in sweat and Spike's cum. Spike could feel the excessive amount of pre-cum oozing inside of him as he was suddenly lifted upside down with Twilight over him, still stuck deep inside but positioned in a way that she was able to force Spike's own twitching member into her dripping cunt, making them both moan as she railed Spike and, in a way, herself.

Spike was in heaven, getting pumped by Twilight and doing some plowing of his own though he had no way to do it himself in his position so he simply let it be. The two plunged deep into each other before Spike finally felt her build-up and his own as they simultaneously cried out and let loose a wave of hot, sticky jizz into one another, the both of them twitching and shuddering in pleasure as Spike felt his stomach overflow, groaning as he was pulled out f and felt it all begin oozing from him, Twilight letting his legs drop as she leaned down to kiss him deeply before she called for him, her mouth moving but it was oddly muffled as she knocked on his head. He groaned and looked up at her confused as she did it again but louder and harder before she finally brought her fist down and--

Spike shot up from his bed with a gasp as he looked around to see he was still in his room, the video he'd been watching finished as he looked around and then to his door. He walked over and opened it up to see Twilight in a towel, "Oh, hey Twilight... What's up?"

"I was just coming by to say sorry for yelling at you earlier. I was frustrated by my experiment going up in... Slime, I guess? But it wasn't completely your fault so I'm sorry. Also..." She grinned as she opened up her towel, "Someone aced their trig test and deserves a reward~" she said showing off her beautiful body as she moved closer, Spike happily taking her into his arms as she kissed him passionately, pushing him back into his room and kicking the door open behind them.

Author's Note

This Bonus Chapter was a commission by the same person that requested the story originally, however they've asked to remain anonymous and I shall do so.

If anyone else would like to commission me for a story or even a reading at any time please do reach out to me. I'd be happy to oblige and negotiate payments. Now, enough shameless plugging! Onward to the story!