Twilight noticed Spike hadn't been acting like himself lately. He seemed... Down, like he wasn't happy with his life. Being the caring friend she is, this disturbed her greatly, she felt the need to confront him about it.

"Hey, spike.." Twilight greeted.
"Oh, hey Twilight." Spike said.
"You've been acting quite strange lately.....is anything wrong?"
"Nope, Twilight! Just fine!"
"You just, don't seem happy Spike, and if you don't tell me what's wrong I can't help."
"But nothings wrong Twilight, I swear!" Twilight figured he would not be budged at this point, so she simply decided to let it go for now.
"...Alright...But if I see any more odd behavior, I may need to interfere. " Twilight said, with apprehension in her voice. "And if you need anything, just ask."
"Sure thing, Twilight!" Spike cheerily responded.

Spikes behavior seemed to get better for a bit after that talk. He helped around the library, did all his normal duties with no complaints, and even seemed to be in a better mood. One odd thing Twilight noticed, however, was the fact that spike had been reading a lot of books on pony anatomy, she figured she'd let this go, after all, what's the worst thing he could do with such books?

It wasn't until one night, about a month after their talk, that she noticed something that disturbed her...greatly. She had been awoken at around 3 in the morning by hideous moaning sounds. They were coming from Spikes bed. These sounds, she couldn't tell exactly what they were. Her immediate thought was to look and see if he's ok. She would have done so had another thought not occurred to her. What if he was...experimenting? There was no way she was gonna embarrass herself by walking in on him during that. Something about the sounds were terrible though, she may be a bookworm, but she knew what kind of sounds they actually made when entering their..climax. Spikes sounds were much different, they sounded almost like pain, but yet he sounded somewhat satisfied. She figured that maybe dragons were more vocal with this kind of thing, and attempted to drown out the sounds and go back to sleep.

Morning arrived, after a not so very good night of sleep for Twilight. She so desperately wanted to ask Spike what he was doing last night, but she avoided the subject, knowing the embarrassment it would cause to both of them. So, she tried to ignore the topic as best she could. This got more difficult however, because as the days passed, she continued to hear Spike doing this more and more frequently. Soon, she was not only hearing his sick, blood curdling moans, but also the vocal expression of his fantasies. He said some very disturbing things, and Twilight was far beyond embarrassed at this point, now she was flat out scared. It was like she didn't exist, he would do this all the time, in the open, she had to avoid him just to pretend to "not notice" it.

She continued to avoid the subject, until one day, when she saw something that crossed the line. Spike had awoke from bed, and went down to greet Twilight, and she noticed that near his groin, there were large, deep, scratches. She recognized these immediately as Spikes own claws (she was an expert at the claw marks, teeth marks, and footprints of many animals. Just like she was an expert of almost anything that could be researched out of a book) She knew now she had to confront Spike before this got more out of hand.

"Spike?" Twilight said softly.
"Yes, Twilight?" Spike said, a bit nervously.
"I've noticed some severe issues going on with you Spike, I've been trying not to mention it, but, it looks as if you're hurting yourself with this. This kind of stuff is not for a dragon your age and-" Spike cut her off.
"Look, Twilight, this is MY business here, and I don't need you interfering!" Spike was sweating at this point.
"Spike, we need to talk, this is unhealthy."
Spikes expression turned from fear and apprehension, to one of glee.
"Fuck....you...." Spike said.
"Spike, you're scaring me.." Twilight worriedly said.

Spike said nothing in response, but instead leaped across the room to the dining table. He tried ripping one of the legs of the table off, but wasn't strong enough, so, thinking quickly, he spit some fire onto one of the legs. It broke through the wood immediately, and he took the charred wood and ran to attack Twilight. Twilight was too dumbfounded to do anything at this point, she simply stood there with a shocked expression on her face as he drew the wooden board down upon her skull, successfully knocking her out.

Twilight awoke in Sweet Apple Acres, her head was in terrible pain. More frightening then the pain, was the fact that all around her, she saw her friends, who were all hurt. Rainbow Dash and Fluttershy's wings were cut off, with bandages around where they would be, Rarity was missing her horn, Applejacks legs were broken, and Pinkie Pie had an alarming amount of cuts and bruises. Not to mention every single one of them was tied up around their front and back legs. Twilight didn't even have a second thought, she knew she would be missing her horn too. All 6 of them were virtually defenseless.

"Well hello, my little ponies" spike said coolly across the barn they were trapped in.

Twilight spoke first, "Spike...why would you do this?" After she said that, Rainbow Dash, Rarity, and Applejack started yelling, they were yelling over each other, and Spike couldn't make out any of it, but it's not like he gave a shit. Fluttershy, Pinkie Pie, and Twilight were quietly weeping, and accepting the fate that obviously fell before them.

"Big Mac'll be here any second ta' kick yer ass!" Applejack shouted.
"Big Mac? Bah, he aint so tough." Spike responded.
"You think ya' can take 'im? I'd like ta see ya try!"
"Well, if I couldn't take him, I don't think his guts would be spilled all over the farm right now, now would they?"
Applejacks face twisted from anger to sadness. "You...didn't hurt Applebloom...did ya?"
"Of course not! Why waste such young, tight, pussy!" Spike retorted.

At this, Applejack struggled as hard as she could to escape her bonds, furious with anger. Spike walked over to Applejacks squirming body, and jabbed his claw in her eye. She let out a cry of pain, and spike breathed fire onto her face. The green flames quickly spread all over her entire body. She writhed around, and the smell of burning fur and flesh resonated throughout the barn. Applejack struggled in immense pain, and it took several minutes for her to finally die. When Spike was sure she was dead, he put out the flames with a bucket of water in the barn.

Spike spoke up, "I hope you all see now why you should just SHUT UP!Now, you deserve an explanation as to why I'm doing this, and I will surely provide one." Rainbow Dash, Rariry, Fluttershy, Twilight, and Pinkie Pie listened quietly, for fear of death in doing otherwise. "You see, you ponies always ordered me around, told me what to do, and what did I ever get for it? Payed? No. Hell, I didn't even get respect, Twilight, you fucking treated me like a kid, and got into my personal business. I was nothing more then a pet to you guys, you treated me like a slave. Not to mention Rarity, who completely ignores my affections. I'm sick of it, and today, we're gonna have a little role-reversal."

"Spike..I'm sorry..." Twilight said genuinely, despite the horrible actions before her, she still considered him a friend.

"Sorry? You're fucking SORRY? Well, I really don't believe that. Sorry is something desperate people say when they realize they're fucked, and use it as a last resort," Spike ranted. All the ponies stayed silent. Spike continued, "Anyways, now, you're going to be my pet. I've been studying pony anatomy, and I think I know how I can create something I like to call a "centipony". It was originally going to have six segments, but then Applefuck wouldn't shut her mouth" Twilight did not like the sound of this at all. The rest of the ponies had no clue what he meant by a "centipony" but Twilight knew, and she knew it wasn't pretty. " I am going to link all of your digestive tracts, ass to mouth. Before I do that though, I'm going to need to break all of your legs." The ponies were shocked, and squirmed trying to escape any way they could, but it was no use. Spike, one by one, broke each of the ponies legs using the wooden board he had used earlier. Sometimes, the legs just broke, but sometimes, the jagged bone stuck out of the muscle and flesh.

After Spike had finished massacring their legs, he moved on to his next step. "Now, I'll need to sew your mouths onto each others asses. Hmm...fluttershy, you'll be in front, becuase you're the most likely here to actually keep your mouth shut, and I think I'll put Rarity in back" Spike said slyly. The ponies were in too much pain and shock right now to even think about what he was saying, so they silently weeped, hoping for it to all end as soon as possible. However, it was not close to over for Spike, he pulled out a sewing kit and some string he had stolen from the Carousel Boutique. He sloppily cut up the sides of their mouths using his claws, and sewed them to the next segment ponies ass. The needle burned as it connected their cut flesh to the rump of another pony, the string drawing their faces closer and closer, and their lips ripping open further. When it was finally complete, he had a real centipony, he couldn't believe he managed to pull it off, and he was quite proud of himself. Fluttershy was at the front, Twilight next, then Rainbow Dash, then Pinkie Pie, and Rarity was at the rear.

Spike's new pet was barely alive, but it didn't change how much he loved it. It was a bloody mess of mutilated ponies. He needed to test his new creation, and in order to do that, he needed to feed it. Then he realized that he himself was hungry, but where would he find any gems in sweet apple acres? Suddenly, an idea hit his mind. He walked up to Rarity, and stared at the delicious diamonds embedded on her. He took a big bite, tearing muscle and flesh off of Rarity with his sharp teeth. Rarity screamed in pain as spike loudly crunched on her meat.

"Oh, no, I'm being selfish," said Spike. "I need to share this with my pet!" So, his mouth still full of meat, he walked up to Fluttershy, and planted a big kiss. He pushed the meat into her mouth with his tounge, and she was forced to swallow every bit of it. Spike was getting very excited by all this, and soon his dick extended out of his scales. He eagerly ran off to the back end of his pet, but then he realized that he needed to make this special. He took a rusty knife he found in the bark, and stuck the blade into Rarity's vagina, she barely made a sound, as she was already on her way to death. After thoroughly cutting her vagina, he went inserted his dick into it, as it was already slumped on the floor at his level. The feeling was amazing, and the blood made it so much better. He thrusted back and forth, and quickly picked up the pace. He wasn't used to this kind of thing. After about 2 minutes of furious fucking, he was about ready to explode, but he didn't want it to end that fast. He pulled his dick out, and looked at it, it was covered in blood, among other fluids.

He realized it needed to be cleaned, so he ordered Fluttershy to do it for him, her being at the front, she was most alive. He shoved his dick in her face, and she nervously placed it in her mouth, fearing more torture if she did not do so. She bobbed her head back and forth as Spike instructed, and after a few minutes of this spike was ready to explode once again. This time, he was ready, and before Fluttershy knew what hit her, he came. Green flame emitted from the tip of his dick, and scorched Fluttershys head, he then pulled out. Upon death, Fluttershy released her bowels, and Twilight was forced to swallow the shit that came out of her ass. Spike was satisfied by this. His pet collapsed, Rarity had died, Fluttershy had died, and the rest were on their way. It was mission accomplished for him.

He walked out of the barn to see Applebloom.
"Wow, Spike! That was amazin'!" shouted a happy Applebloom.
"Haha, thanks." Spike said, modestly.
"SPIKE! LOOK! I GOT MY CUTIE MARK!" Spike looked at Appleblooms flank to see a cutie mark of an apple being cut by a knife.
"Wow, that's great Applebloom!"
"Hey, I just got the bestest idea Spike! Now that I have MY cutie mark, we can go kill those other cutie mark crusaders bitches!"
"Great idea Applebloom....."

Author's Note

I take inspiration from the classic "Sweet Apple Massacre". You know the one.