The next day was just like any other. Spike rode on Twilight’s back as she trotted along on her errands. Spike thought about what he’d done the night before and felt slightly ashamed. At least Twilight’ll never know, I just can’t let what I did change our friendship. Spike thought this to himself, but the fact was that their friendship had already changed. Maybe it hadn’t changed in Twilight’s mind; Spike still spoke to her the same way he ever did, but it was all a façade. Inside, Spike was having dirty thoughts about her almost nonstop. Even sitting on her back, something he’d done hundreds of times before was becoming strangely sexual in his mind. The feeling of his crotch against her bare back, the soft bouncing to the rhythm of her hoofsteps, it was almost like sex. Spike couldn’t dare let himself get aroused. If Twilight felt his hardness pressing into her coat he’d absolutely die, but it was hard to keep his mind clean.

Spike thought to himself about fucking the purple unicorn right there, in public. All he’d need to do was slide himself back to her flank, swing his foot around her backside, catching her tail between his leg and her haunch, and line his cock up with its final resting place and push. Spike thought about this over and over again, running the motion through his mind like a choreographer. One athletic maneuver and before she knew it he’d be inside her, he wouldn’t even need to let his feet touch the ground. I wonder what she’d do, would she keep trotting along? Was that even possible? To fuck a mare while she walked? Or maybe she’d collapse on the street in pleasure. The idea tantalized Spike, but he’d never follow through. Twilight’s friendship was the closest thing Spike had to real love, if he acted like a fool and somehow screwed that friendship up the heartache would be unbearable. As sad as he’d made himself last night, if he didn’t even have Twilight in his life he’d probably think of killing himself. These were just the dirty fantasies of a pubescent boy dragon, nothing more.

“Spike? SPIKE?!” Twilight’s voice snapped the dragon out of his erotic daydream. His heart stopped. Ohmygod! Did she notice something? Spike panicked, thinking his long-time friend had picked up on his shameful vibes. “Spike, I asked you whether you’d be willing to help me reorganize the library this weekend, I’ve got a plan that’ll make archiving new books a cinch.” Twilight spoke nonchalantly. Spike heaved a sigh and replied “No problem Twilight! You can count on me!” raising his thumb to his chest in a garish gesture. Twilight giggled. Spike and Twilight talked some more until they reached their destination, the Ponyville schoolhouse.

Rarity was out-of-town for the day. She’d been asked to join Sapphire Shores at the premiere of her latest concert, Zigfilly Follies, a concert for which Rarity had designed several gorgeous outfits. The premiere was in Canterlot, the hub of culture in Equestria. Due to her departure, Rarity had asked Twilight if she could watch Sweetie Belle for her while she was away and of course, like the friend Twilight was, she had said yes. Twilight Sparkle stood outside the bright-red building as the school bell rang and dozens of fillies and colts poured out excited to be done for the day.

“See yah later Sweetie Belle!!” Applebloom shouted followed by Scootaloo “Yeah, see you tomorrow!!” Sweetie Belle shouted back at her friends in her dulcet, young voice “Bye guys!!!” She ran over to Twilight and greeted her and Spike. The two ponies started off towards the library, Spike still perched atop Twilight’s back.

Not even fillies were safe from Spike's sick thoughts. It hadn’t escaped him that Sweetie Belle was Rarity’s sister and while the resemblance wasn’t perfect it was definitely there. Sweetie Belle lacked the finer details of her big sister. She had no blue eye shadow, her lashes weren’t so preened and prepared, and she did her hair up differently, like a filly who wasn’t so concerned with maintaining her appearance as she was with having fun playing with her friends. Even if she was different, Spike still managed to see her with lusty eyes. Somehow the fact that she was so young and innocent made it all the more arousing. He watched her as they walked home to the library and once there he stole glances at her whenever he could. Spike stood atop a small stepladder, shelving books as he thought twisted things to himself.

It’d be just like Rarity. I bet she’d be even tighter than Rarity, being a filly and all. She’d have to be, and she is more my size, I wouldn’t even have to stand on my tippy-toes. Could I really have sex with Sweetie Belle? NO! It’s wrong, she’s so innocent. …but I do have needs. If I WAS to, how would I do it? I’d want to get her alone, that’d be first. Spike looked over his shoulder at the white filly who was sitting with Twilight, reading a storybook. She looks pretty bored, maybe I could tell her I wanted to play a game! Spike strategized a way to get with the young filly. He imagined luring her upstairs with promises of fun. I wouldn’t be lying, it’s always fun when I do it myself, I’m sure it’d be just as good for her. But how would I take the first step once I had her alone? I could show her my cock and see how she reacted, no, that’s too risky. I’d have to peak her curiosity. It’d be ideal if SHE was the one to start things… Spike thought about this a LOT more in depth than he should have; it was becoming realistic to him. He was genuinely evaluating the feasibility of his plans and trying to come up with the scenario that had the best chance of success.

What if I told her I thought I might be able to help her get her cutie mark? That’d sure get her attention. I’ll bet she’d be willing to do whatever I said after that. Ooooooooo, I’d tell her to show me her privates and I’d talk her through her first penetration. She’d probably whine at first, but I’m sure I could convince her everything would be alright. Spike imagined himself placing his slimy cock against the underdeveloped pussy of Rarity’s sister and pressing into her soft, yielding flesh. I’d be taking her virginity and losing mine at the same time. I might have to wrap my hand around her muzzle to keep her from screaming. I’d be gentle, but there might be no way around hurting her when I take her. But what if she didn’t want to? What if I couldn’t convince her it’d be worth it? I suppose I could always force her. I may be a young dragon, but I’m still strong enough to hold down a filly. I’d be doing her a favor, wouldn’t I? I’d be giving her the pleasures of sex. It would be like I was sharing a special experience with her, something meant for adults. Kids like being treated like they’re all grown up...don’t they? It’s like when you get to stay up past your bedtime, a special treat. No. If she didn’t want to and I forced her she’d surely tell Rarity and Rarity would tell Twilight and my life w-would be over!! Unless… maybe she’d feel too embarrassed and ashamed to come forward about it. That’s always a possibility. Still, it’s too risky.

Spike’s sick, pedophile thoughts made him excited. His penis poked out of his scaly belly as Spike stood on the ladder. Spike finished shelving the books and hopped down making sure to hide his erection from Twilight and Sweetie Belle who were too engrossed in their books to notice him anyway. He needed some release. It was still early for bed, even considering Spike’s latest habit of retiring early. He’d rather not alert Twilight considering his ‘predicament’, so Spike quietly backed up the staircase and ran to his room. He threw himself into his basket and grabbed his stiffy with both hands. The pressure made him moan. Spike began to fantasize. The idea of raping Sweetie Belle seemed more appealing as long as Spike would be fantasizing and no one could get hurt. Spike thought about Sweetie Belle’s marshmallow-like ass. He bared his teeth and bent over the poor filly, pushing her to the ground with a THUMP! Spike lined himself up; there would be no kissing or foreplay. He pictured her soft petals wrapping around his shaft, enveloping it in warmth. Spike almost came instantly, but he stopped his stroking and let his near-orgasm pass, he wanted to savor this. When he was sure he wasn’t going to cum yet, Spike picked up the pace with his hands again. His eyelids fluttered uncontrollably as Spike lay in his bed, lost in a sick world where anything he desired was the norm.

In Spike’s mind he was invincible. Drooling on the filly’s back, Spike took her innocence with thrust upon thrust. He didn’t imagine how much he’d be hurting her, that wasn’t part of his fantasy. Spike’s mind was using all its synapses to imagine the stimuli that he himself would be feeling. He slumped over the filly, wrapping his arms around her belly. He breathed hot, moist air across her cheek as he hugged his victim in a sweaty embrace. Spike’s brain was really outdoing itself with the detail of this fantasy. He could almost feel every curve of Sweetie Belle’s body, inside and out. Her pink and purple hair was becoming disheveled and damp with perspiration and dragon drool, and her childlike cries and sounds of panic reverberated in Spike’s mind like perpetual church bells. The pleasure Spike imagined as he closed his eyes was so amazing, it was like one of Pinkie Pie’s famous parties condensed to a single moment. Spike was lost in imagination. The truth is Twilight or Sweetie Belle could have walked in on him at any moment, but Spike couldn’t do anything about that; he needed this and he wouldn’t spoil the moment by being paranoid.

Back in Spike’s thoughts, his fantasy was growing out of control. The dragon wrapped his hands around Sweetie Belle's smooth neck and choked her as he sped up his thrusts. She gagged and struggled for air, her hooves scrabbled on the hard floor. Spike choked her ever harder as he neared his climax. The thought of cumming on her flank and telling her it was her cutie mark put a wicked smile on his face while he masturbated, but that wouldn’t be his plan, no, no, no. She was a filly; she wasn’t sexually mature and hadn’t started her estrus cycle. Spike would take advantage of this. The boy wasn’t sure if dragons and ponies were biologically compatible, he wasn’t sure of much of anything when it came to these matters, but he did know that fillies couldn’t get pregnant. Still choking the unicorn who was turning blue in his fantasy, Spike slammed his cock into her to the hilt for three final slapping thrusts as he filled her full of his seed.

Spike opened his eyes as the final tides of pleasure receded from him; he was lying in his basket in his dark room, covered from head to toe in semen. It was concentrated around his wilting cock where thick puddles of the substance collected, but strands of his seed had leapt from the boy and fixed themselves to his body in sultry splashes. Blood still pumping, Spike closed his eyes again and tried his best to imagine the aftermath of his perverse mental act… first he imagined a sobbing Sweetie Belle, grasping at her bruised neck. This was the first time he’d tried to put himself in his victim’s shoes and take a guess at the emotions she’d be feeling. He imagined she’d feel used, sore physically and mentally, but content that it was finally over. He didn’t linger on trying to decipher her emotional state before a sicker thought crossed his mind. He pictured her slumped posture, his warm cum, draining out of Sweetie Belle’s distended vagina. It dripped from her inner thigh like a leaky faucet and pooled underneath her lifeless body. Spike had choked her too long. The brightness left the child’s skin, replaced by a dull, grayish white indicative of a corpse. She stayed motionless… dripping with sexual fluids, completely used up and frozen in a disgraceful position, her ass pointed to the heavens, haunches splayed open, head pressed tilted against the floor, her eyes cold and glassy. The thought gave Spike a painful, stinging erection. Spike let the image loiter in his mind, he held it there, keeping all other thoughts out as if by sheer willpower he could extend his pleasure and never let it end.

Spike snapped to his senses at the sound of hoofsteps coming from the library downstairs. Two sets of hoofsteps. “Twilight and Sweetie Belle!!!” Spike said panicked in a breathy voice. “I can’t let them see me like this!!!” He bolted from his bed and sprang into the hallway, still covered in crusty jizz. Spike sprinted to the bathroom so fast he thought he almost could’ve caused a Sonic Rainboom. Slamming the door shut, Spike turned the faucet to draw himself a bath and walked to the vanity. He pondered how he’d explain such a late night bath to Twilight. Maybe, she won’t ask? …and if she does I can just say I felt like a bath! After all, it’s my home too! Since when do I need an excuse to take a bath in my own home?! Spike grew indignant at Twilight, before she’d even had a chance to say a word to him. The purple dragon looked himself over in the mirror while the sounds of rushing water drown out everything else. Spike stared into his eyes then examined his body, then looked back into his eyes. He felt ashamed, deeply ashamed. He was splattered with cum like some cheap whore, and he’d just pleasured himself to horrible, immoral thoughts. He knew they were immoral thoughts. Spike watched as his likeness grew blurry; tears were welling up in his eyes.

No.. don’t cry Spike. The boy tried to comfort himself, shaking his head and closing his eyes tight, squeezing the tears into twin streams that rolled purposefully down his cheeks. It’s just a fantasy, nobody’s hurt, there’s nothing wrong with fantasy, it’s what you actually DO that makes you a good or bad person. Spike tried to find solace in his inner-voice, but he wasn’t sure anymore. The image of the dead, pasty unicorn filly snapped back into his thoughts, a grim reminder of the twisted sickness Spike had just immersed himself in. It instantly caused his eyes to fill with tears again. Spike turned away from the mirror with his head held low, weeping, sniffling. He sauntered over to the tub and, closing the faucet, plopped himself into the warm water and began cleaning his shame. His hormones were killing him. His horniness had taken over his mind, jeopardized his friendships and his sanity. He wanted to stop these thoughts, end the fantasies, but he couldn’t just quit. His young body outright demanded the pleasure and it was taking more and more depravity to satisfy him. Spike scrubbed his scaly body with a sponge, making sure to wash the cum-trails off his face and shoulder. As he cleaned his body Spike had an epiphany. If only I could have sex with someone, it might lose its mystery and I’d be myself again…