Hidden Desire

by Flutterfan457

Rating: mature
Tags: Sex, Slice of Life, Anthro, Main 6, My Little Pony: Friendship is Magic, Spike, Romance, Fluttershy
Length: 4570

As Spike nears his 18th birthday, new events transpire that will decide his place in a certain pony's heart.

Spike is finally becoming a legal adult, and he plans to solidify his relationship with Rarity. Little does he know, Fluttershy has loved him for some time. When Spike plans to propose to Rarity, he wiill find things are not all he hoped them to be.

Published 2013-12-10 04:50:04 UTC
Last updated 2013-12-10 04:50:04 UTC

Chapter 1

Twilight Sparkle was out with her assistant Spike taking care of a few errands. She had kept him busy with deliveries all morning. This allowed her to keep him out of her friends efforts for his surprise. Spike's 18th birthday was coming up and Twilight intended to make it the best he ever had. As they came to Sugarcube Corner, Twilight pulled out an order form from her bag.

"Spike, can you take care of this?"

"Sure thing, Twilight."

Twilight handed Spike the order and he ran off. Twilight walked inside to see Mrs. Cakes behind the counter.

"Hi Mrs. Cakes."

"Hello Prin-er, I uh, mean Twilight dear."

Twilight rolled her eyes. Even after a few years, some ponies still weren't sure how to address her after she became a princess.

"Is my order ready?"

Before Mrs. Cakes could respond, Twilight was pounced on by Pinkie Pie. Pinkie held Twilight in a tight hug for a few seconds.

"Twilight, this is one of the best cakes we've ever made! I hope Spike likes it!"

Twilight laughed lightly as Pinkie broke the hug. Twilight noticed Pinkie's outfit seemed a little small for her, as usual. Her clothes consisted of a pair of light blue jeans covered with flowers and bright colored beads and her shirt was a tank top with 'Sugarcube Corner' written across the front in candy letters. The shirt did little to hide her large breasts, especially when she bounced.

"Pinkie, you should really think abut wearing clothes that actually covers you."

Pinkie looked over herself for a few seconds and smiled.

"Where's the fun in that? Besides, Mrs. Cakes appreciates when I dress like this, cause stallions pay attention to me instead of her."

Mrs. Cakes face palmed and blushed at Pinkie's statement. Ever since she had the twins, Cup Cake became very busty. It wasn't just her breasts, though they were certainly large, but her whole figure seemed to balloon. At first she was afraid Carrot Cake wouldn't find her attractive anymore. Thankfully, it was the exact opposite. Unfortunately, the other stallions and colts in Ponyville took notice of her as well. Thankfully, Pinkie had the idea to show off herself to take pressure off Cup Cake and it had worked for the most part. Cup Cake ceased her reminiscing and spoke to Twilight.

"I could show you how the cake is coming if you'd like, Twilight."

Twilight nodded and followed Cup Cake to the kitchen. Carrot Cake was for the order to finish. By his side were the twins Pound Cake and Pumpkin Cake, both energetic toddlers waiting to see the result of their efforts.

"Sweetie?"

"Yes, Honey bun?"

"Is the cake almost done?"

"Right...about...now!"

The oven dinged and Carrot Cake opened the oven. Using a pair of ovens mitts, he pulled out a cake that flooded the kitchen with colored lights. The cake was completely covered with all varieties of precious stones. It was ten inches tall and had a diameter of six inches. Carrot Cake set it on the counter for everyone to see.

"Spike is going to love this."

"We also have the double Decker marble cake ready too."

Twilight nodded in approval. Pinkie started rambling in joy.

"I can't believe Spike is gonna be a legal adult! Seems like it's been such a short time since he was just a little dragon!"

Pinkie continued on while Twilight was lost in her thoughts. She sincerely hoped this birthday would go right. Twilight wanted it to be as special as she could make it. Spike had been her assistant for his entire life and even now had no intention of quitting. She didn't show it as much as she should, but she was very thankful to have Spike and was very proud of him.

~

Spike had taken care of the package for Twilight, but he had one more thing to take care of. He was heading into the market area when he was called by someone.

"Spike?"

Spike turned to see Fluttershy towering over the other ponies. She walked toward him. Fluttershy had experienced a late growth spurt the past year. Because of it, she was now the tallest pony in Ponyville, beating Big Mac by a few inches. She also seemed to develop a bit more muscle and her shoulders broadened. This new growth helped her overcome her meekness a little but she was still a very kind pony. This earned her a reputation as 'The Gentle Giant of Ponyville.' However, this didn't change her natural bustyness or mild obesity. Fluttershy's breasts were arguably the largest in Ponyville, even before her recent height gain. Her weight problem had always been there for two reasons. One was she had poor metabolism, and two was she adored the food at Sugarcube Corner. Pinkie only made it worse because she knew this and gave Fluttershy free samples. Though her new height offset this a bit, she still had plenty of huskiness on her, mostly her bottom, thighs and a little on her stomach. Fluttershy smiled at Spike.

"What are you doing right now?"

"I just took care of an order for Twilight. I'm heading to Sugarcube Corner, but there's something I need along the way."

"May I come with you?"

"Yeah, that's fine."

The two walked together chatting pleasantly. Fluttershy had to walk slowly to allow Spike to keep up.

"So how's the new height been?"

"I like it very much. Though it's a little harder to find clothes now."

"Well, maybe Rarity could help you."

"She does, but what she makes is a little too fancy for my everyday clothes."

Spike looked over Fluttershy for a second. Her outfit was very simple and a little tomboyish. She wore a light red t-shirt under a button up blue shirt. Her pants were slightly worn but still in good shape. In a way, it suited Fluttershy well. She was a humble pony and didn't have many luxuries aside from her animals. Fluttershy put her arm around Spike and pulled him a little closer.

"You have a big day coming up, I hear. Do you feel any different being a full adult?"

Spike sighed in slight annoyance.

"Not really. Especially considering I'm still a runt."

"Spike, you're not a runt."

Spike looked up at Fluttershy and giggled slightly.

"No offense Fluttershy, but you're the last one I expected to say that."

Spike, there's nothing wrong with being short. In fact, I'd say you're a better man than a lot of stallions I know."

"Seriously?"

"Yes. Most guys in Ponyville are kinda lazy. But you're always working or helping somepony. It definitely shows too."

Spike mulled over this for a moment. He flexed his free arm, showing off his solid muscle. He smiled proudly.

"Well, it's about time!"

Fluttershy smiled shyly. Ever since puberty, Spike seemed to become more and more handsome. He had gone from an adorable boy to a handsome and even sexy young man. His frame was slim but well toned. Spike also kept himself presentable by polishing his scales and dressing neatly. This was always done with the intention of gaining Rarity's favor. Spike didn't realize more than a few mares in Ponyville were interested in him. The former cutie mark crusaders, Twist, even older ponies like Roseluck and Pinkie had taken a second glance at Spike. But if anyone truly was in love with him, it was Fluttershy. As Spike got older, Fluttershy spent more and more time with him, helping their friendship become stronger. Fluttershy never tried to make anything more of it. She knew how much Spike loved Rarity, even though it saddened her greatly, she refused to interfere with his happiness. If Spike was truly happy with Rarity, she would accept that. The two continued to chat until they reached the jewelry store. Spike's eyes lit up in excitement.

"Excuse me a minute Fluttershy. There's something I have to take care of."

Fluttershy looked at him curiously as he ran into the store. Spike saw a middle aged earth pony cleaning a necklace behind the counter.

"Excuse me."

The clerk looked up and smiled seeing Spike.

"Ah, my favorite customer. Got your order all set."

Spike's smile widened and he nearly bounced in excitement. The clerk reached under the counter and produced a small box big enough for a ring. He pushed it toward Spike.

"I'll let you do the honors."

Spike held the box in his palm and slowly lifted the top open. Inside was an exquisite engagement ring. The band portion was polished gold with a serpentine dragon engraved into it. On it's top was a large purple gem identical to the element of Generosity. Spike looked over the ring for a full minute, taking in every detail.

"Absolutely perfect. Just like her."

"I don't think I've seen anypony go to such lengths for an engagement ring."

"If you knew her, you'd understand."

Spike shut the box and put it in his chest pocket. He thanked the clerk and walked outside to Fluttershy who smiled at him.

"Are you planning to propose soon?"

Spike jumped a bit at her realizing his purpose for the jewelry shop.

"How did...?"

"You've been talking about it for a long time. I can't think of another reason you'd come here."

Spike fidgeted awkwardly and rubbed the back of his neck. Fluttershy put a comforting hand on his shoulder.

"I think you would make a wonderful husband Spike. Anypony would be blessed to have you."

Spike blushed and smiled shyly. The two continued to walk and chat until they reached Sugarcube Corner. As soon as they entered, Spike was pounced on by Pinkie Pie, who snuggled him in a tight hug.

"Ooh, Spike! I can't believe you're already 18! I promise I'll make this the best birthday you ever had!"

Pinkie continued on and on, Spike simply enjoying the attention. He wouldn't tell anyone, but he did enjoy getting hugs from Pinkie for less than innocent reasons.

"Oh, lemme give you one of your presents now!"

"One of-?"

Spike was cut off by Pinkie planting a playful kiss on his lips. She repeated this, counting off each time. Twilight simply watched in amusement. Pinkie was always looking for an alternative to birthday punches. She had done hugs, snuggles, tickles and razzies. However, for her closest friends, she had always given kisses, which had never changed. Pinkie finished giving Spike kisses, making him blush brightly. Pinkie placed both hands on spike's cheeks.

"And a big hug!"

Pinkie pushed Spike's head down and literally buried his face between her breasts. She giggled and held him close while Spike held his hands away, completely uncertain how to act. Pinkie had flirted with him before, but never like this. Fluttershy watched in surprise as well as jealousy. She wished she could be as open about her feelings as Pinkie. Fluttershy wanted nothing more than to be in Pinkie's position. She ceased her pondering as Twilight pulled Pinkie and Spike apart.

"Pinkie, why do you always do that?"

"It's fun to flirt with your bestest friends!"

Spike cleared his throat and wiped his face, trying not to look embarrassed.

"Do you ever plan on acting on all this flirting?"

Pinkie thought about it for a second and gave Spike a very sultry look, making him step back slightly.

"Maybe..."

Pinkie gently wrapped her arms around Spike and pulled him close. She gently nuzzled his nose with hers while gazing into his eyes.

"Would you like to be Pinkie's special somepony?"

Spike stumbled over his words trying to respond. Pinkie leaned her mouth next to his ear and whispered.

"I'd love to know how you taste..."

Pinkie lightly licked Spike's ear and wrapped her tail around his. Spike's face was bright red as he stood completely dumbfounded. Fluttershy pulled Pinkie off him, looking somewhat upset.

"He's not an adult yet, Pinkie. You have to wait a little longer."

Pinkie noticed the slight anger in Fluttershy's voice and backed off. Twilight looked perplexed by it but decided it was time to leave.

"We need to get going. We'll see you later everypony."

She and Spike wished Pinkie and Fluttershy a goodbye. As soon as they were gone, Pinkie questioned Fluttershy.

"Are you and Spike dating?"

Fluttershy blushed at Pinkie's statement. She fidgeted with her hands, uncertain how to respond.

"W-well...it's just...I..."

Fluttershy sighed, feeling hopeless and defeated. She sat at a table and buried her face in her hands. She closed them into fists and pressed them into her mouth, showering her very sad eyes. Pinkie sat beside Fluttershy and placed an arm around her shoulders. Fluttershy took a deep breath before speaking.

"He's going to ask Rarity to marry him."

"How do you know?"

"He bought an engagement ring on the way here."

Pinkie continued to watch Fluttershy as she looked depressed.

"Why don't you tell him how you feel?"

"Because we're just friends."

"But....you love him, don't you?"

Fluttershy put a hand on her forehead, looking like she wanted to cry. Pinkie gave her a comforting hug. Fluttershy took a moment to control herself before she spoke.

"This is something he wants more than anything. I can't...I could never keep him from being happy."

"But what about you?"

Fluttershy covered her eyes with her palms as her lips started to tremble. Pinkie tried to comfort her with a hug, but Fluttershy felt completely hopeless. Spike was her best friend, and she wanted nothing more than to share her life with him. But it was common knowledge Spike only had eyes for Rarity. Even after so long, he was still completely devoted to her. Fluttershy saw how much joy it brought Spike just thinking about Rarity and she refused to ruin it. No matter how much it hurt, Spike's happiness meant more to her than anything.

~

That night, Spike and twilight had settled into the library's den, enjoying each other's company. Twilight wore a white t-shirt and boxers while Spike wore a pair of pajama pants. Twilight took a small sip of wine and smirked at Spike.

"A few more days, and you can have as much of this as you like Spike."

Spike gagged and took a sip of cider. He had only tried alcohol once and detested it. He didn't understand how Twilight could enjoy it so much. Not that she was a heavy drinker. Twilight never drank more than a few ounces at a time. She only drank to take the edge off at the end of the day. Twilight playfully twitched Spike's head spines.

"Is their anypony special you have your eyes on?"

"Yeah, Rarity."

"What? I thought you two weren't going out anymore."

"No, that's not it..."

Spike rubbed the bridge of his nose. Twilight looked concerned and gently squeezed his shoulder.

"A while back, somepony accused Rarity of being a pedophile."

"What? Wait, how did I never hear about this?"

"It was some kind of small town religious nut. I can't remember much about him, just that he was an old nut job."

"What happened to him?"

"Well, I tracked him down and threatened to have him arrested."

Twilight cocked her brow.

"And that made him back off?"

"I did tell him I was friends with a princess."

Spike smiled smugly and took a sip of cider. Twilight smiled amicably and patted Spike's shoulder.

"That wasn't the end of it though. He'd stirred up enough rumors that a lot of ponies were getting suspicious. We talked about it and...we decided to wait till I was a legal adult."

Spike sighed wearily.

"Unfortunately, a few ponies thought we split and decided to move in."

Twilight smirked slightly in amusement.

"I'm assuming that's why the crusaders had you bound in their clubhouse."

Spike groaned and buried his face in his hands while Twilight rubbed his back. That was a day neither of them would forget. Applejack had sought out Twilight, telling her she needed to come to the farm. When she arrived, Granny Smith was busy scolding the crusaders while Big Mac comforted Spike. Twilight didn't believe what she was told. Apparently, the crusaders had tricked Spike into coming to their clubhouse. Once inside, they stripped him down to his boxers, tied him to a chair and took turns making out with him. It might have gone farther if Applejack hadn't arrived when she did, finding Applebloom sitting on Spike's lap with her tongue down his throat. The crusaders explained they were very curious about boys, which there was a lack of in Ponyville, and they all had big crushes on Spike, despite being a few years older than him. Thankfully, Spike wasn't traumatized, only embarrassed , and accepted their apology. Though it was a while before he went back to Sweet Apple Acres. Twilight took another sip of wine.

"Honestly Spike, there aren't many stallions in Ponyville as good looking as you. You and Big Mac are the best looking guys in town."

Spike had a good hardy laugh.

"I still can't believe that. Ponies are actually comparing me to Big Mac. He is a literal mountain of muscle bound manliness."

"Just because you short doesn't mean your not handsome. Besides, you've got plenty of your own muscle."

Twilight playfully rubbed Spike's pecs and abs, making him smile shyly. It was a bittersweet feeling for Twilight. On one hand, she was very proud of the amazing young man Spike had become. On the other, it reminded her how much time had passed. It made her feel nostalgic and a bit depressed. She set her head on his shoulder and continued to caress him. Spike noticed her sudden change in mood.

"What's wrong, Twilight?"

"I...I miss the days when I could carry you on my shoulders."

Twilight remembered those days fondly. Spike was always her number one assistant, an adorable pudgy little guy who followed her anywhere. Back then, she took it for granted. Now she wished she could live them again. Spike smiled mischievously.

"Well, I could carry you on mine."

Before Twilight could question him, Spike stood up and lifted Twilight high in the air, making her scream in shock. Spike set her on his shoulders. Twilight placed her hands on his head and flared her wings to keep her balance.

"Spike, put me down!"

Spike lifted Twilight off his shoulders and set her on the ground. She playfully punched his arm as she laughed.

"Are you crazy?"

"Hey, don't be jealous that I'm the strong one now."

Spike crossed his arms and smiled smugly, but Twilight gave him a knowing look.

"Oh really?"

Twilight tickled Spike's stomach, making him howl with laughter and beg for mercy. No matter how much he grew, Spike would always be very ticklish. Spike fell to the floor and lay on his back ,completely at Twilight's mercy. Twilight was not satisfied with just tickling though. She pressed her lips into Spike's stomach and blew a big razzie into him.

"No! Please! You win! I give up!"

Twilight continued for some time, despite Spike's pleading. Twilight did it partially to remind Spike who was in charge, but mostly because she was having a bit of empty nest anxiety. Twilight didn't know how much longer Spike would live with her and she wanted to enjoy it as much as she could. When she did stop, Spike was ready to pass out from laughing so hard. Twilight let him catch his breath for a moment and levitated their glasses to the kitchen. Twilight helped Spike to his feet and kissed his forehead.

"Goodnight Spike."

"Night Twilight."

Twilight went upstairs to her bedroom while Spike went to his own near the den. When Spike became a teenager, Twilight noticed he seemed less comfortable sharing a bedroom. Twilight understood it was just Spike growing up and wanted some independence and privacy. With some help from her friends, Twilight had built a decent size bedroom for Spike. It didn't have much. A double bed, two cupboards and a nightstand. Though Spike did ask for a large closet, mainly to put his emergency gem stash. He went to it to check how much he had. Spike's sack was about halfway full with many different varieties of precious stones.

"Hmm. I'll have to get more soon."

Not many knew about Spike's stockpile. He rarely needed to use it. Though he made sure never to keep more than his sack. Anymore would make it a horde, and Spike had no intention of doing that again. Spike tied the sack shut and climbed into bed. He put his hands under his head as his thoughts went to Rarity. Even though they hadn't dated in a while, they still talked and Spike was certain Rarity felt the same thing he did. He drifted off to sleep, having happy dreams about his dream mare.

~

Fluttershy spent her evening tending to her animals, as usual. Most were sleeping soundly after their dinner, but others like owls and raccoons were enjoying the cool night air outside. Once her work was finished, Fluttershy sat on her couch and reclined for a bit. As much as she loved her animals, Fluttershy wished she had someone to live with her. when she was younger she was more than content to be alone, but only because her shyness made living with another impossible. Now that she was a little more confident, she was surprised to realized how much she wanted a special somepony. Though there was one young man she wanted more than anyone.

Fluttershy sighed. Even after all the years she'd known him, nopony could compare to Spike. Not just in looks, but he could be like a fairy tale prince; so charming and polite. Rarity was very lucky to have won him over for so long. Fluttershy felt a mix of jealousy and concern at this thought. Ever since his first day in Ponyville, Spike had been at Rarity's beck and call nonstop, but Rarity never seemed to take it seriously. Most of the time, she took advantage of Spike's feelings, using him like a puppet. Although they had been dating until recently. Rarity explained to Fluttershy why she wasn't seeing Spike at the moment. Unfortunately for him, a lot of mares decided it meant he was single. Fluttershy could never do that. Even though she loved him with all her heart, she didn't dare try anything with him. Spike was happy waiting for Rarity, and obviously wanted to spend his life with her. If that was what made him happy, Fluttershy would accept it. Even if it broke her heart.

Fluttershy looked at a clock to see it read 9:45. She walked upstairs to her bedroom, ducking to avoid hitting her head on the support beams. One disadvantage to her height gain was her home was harder to get around her home. She even needed a larger bed to accommodate her size. Fluttershy stood before her mirror and undressed. When she was down to her underwear, Fluttershy took a moment to look over herself.

Fluttershy felt very self conscious about her weight. Although being taller had changed her figure from rounded to an hour glass, she still had a pudgy stomach, which still brought out her natural shyness. But the worst case was her bottom, thighs and breasts. Ever since puberty, they'd always been very big and her growth spurt only exasperated the problem. Fluttershy had to wonder if that was why Spike never took a second glance at her. Probably, considering Rarity had a perfect slim figure. How could Fluttershy compete with her? Fluttershy sighed sadly, feeling very lonely at that moment.

She ceased her inner brooding and removed her underwear. Fluttershy quickly went into her routine, brushing her mane and tail and brushing her teeth. Her regiment finished, Fluttershy walked to bed but stopped at Angel's basket. She smiled softly and very gently scratched his back, making him shift slightly. Fluttershy slipped under the covers of her bed and got comfortable, but she didn't fall asleep. Thinking about Spike made her want someone to hold. Fluttershy snuggled comfortably into her bed , but sleep would not come. Her thoughts went back to Spike, though now Fluttershy fantasized about him with her, nude as she was and cuddled together. Fluttershy moaned happily and hugged herself at the thought.

She started to play with herself, imagining Spike kissing and licking her breasts. Fluttershy cooed and squirmed at the thought and tugged and squeezed her large puffy nipples. As they became fully erect, little drops of milk started to flow. Shortly after puberty, Fluttershy discovered she was able to produce breast milk, which added to her large bust. She never had need of it, and kept it a secret from others, wearing padded bras to keep it contained. Fluttershy licked her nipples, tasting the sweet milk. She took one breast in her mouth and began to suckle with vigor while groping the other. In her mind, Spike was roughly twisting both her breasts while shoving his tongue inside her mouth. Between her fantasy and touching herself, Fluttershy shivered from head to toe, ready to burst at any-

Fluttershy suddenly stopped and crossed her legs as tight as she could, holding back her orgasm. After a few moments, the feeling of sexual eruption subsided, but her clitoris and pussy remained swollen and wet, needing a release. Fluttershy looked over the edge of her bed to check on angel. Thankfully, he was still asleep. fluttershy needed to be careful. Her orgasms tended to be loud, and messy. She quietly walked into her bathroom and locked the door. Fluttershy checked her hamper and found two large towels. Fluttershy did one last check to make sure it was locked. She lifted the seat of her toilet and set herself so it would catch most of when she came. Certain she was ready, Fluttershy returned to caressing her breasts as well as paying with her clitoris and pussy. It didn't take long before the feeling climax built up inside her. She started to rub herself harder and faster, sweat forming all over her and fluids falling from her pussy.

As climax came closer and closer, Fluttershy moaned loudly and cried out to spike, imagining him having intense sex with her, penetrating her and as his mouth and claws molested her. Fluttershy finally hit her limit and covered her mouth in a towel as she screamed in bliss and her pussy burst with fluids like a geyser. Her orgasm barely lasted three seconds, but it left her whole body feeling worn and drained, but she had a feeling of warmth and tingling. She lay back and panted heavily, barely able to move. After several minutes, Fluttershy wearily stood up and looked around. Thankfully her plan worked and all of her fluids were caught by the toilet. She looked in the mirror and had to laugh at herself. After she'd worked to clean her hair before bed, now she was a frazzled, sweaty mess. She didn't care, it was worth it. Fluttershy used the second towel to wipe off her perspiration and returned them to the hamper. Fluttershy checked on Angel once more, relieved to see him still asleep. Fluttershy carefully climbed into bed and was asleep less than a minute later, having happy dreams about the young man she adored.

End of Part 1