"So, I told Granite, if you ain't gonna give me at least the next two days off, you can forget about ever trying to get into my sister's panties!" said a royal guard.

The other guards all laughed at their comrade's story as they let out a hearty chuckle. The guards were in a bar; they sat at a table filled with drinks. One of the guards was Emerald; compared to his comrades, he just kept quiet and half-listened to his buddies telling stories about today's events.

"Em? Em!"

"Hmm, huh?" said the private, looking at his buddy Onyx.

"I said, tell us about today's day with the princess' pupil."

"Oh, you know. Same old, same old," said the guard to his Liuenetant and other comrades. "Managed to get through six books today."

"Eh, a new record, huh?" said a guard as he sipped his drink.

"Yeah, a new record," responded Emerald sheepishly, as he wasn't fully lying. Twilight did go through six books of sexual techniques for them to perform as it nearly left the private completely drained.

The guard downed his drink in one swing as he slammed his glass on the table.

"Another one, please?" said the guard as he signaled to the bartender for another drink.

"Damn, Em. That's like your ninth one already. I thought you were a light drinker." said a guard.

"Well... I've.... been practicing holding my drinking number," lied Emerald.

He didn't want to tell his buddies the truth, and that was because of all the energy elixirs that Twilight had him take during their experiments. Not only did it restore his vitality, but it built up his endurance and toxicity levels. In short, he'd gone from barely holding a drink to now being able to drink most of his friends and patrons in the bar under the table. It seemed Twilight's energy tonic didn't just affect Emerald's vitality but the cells in his body, which also affected his metabolism as he ate more than usual due to how it burned faster than his comrades.

"Anyways, your babysitter adventures are coming to an end. Tomorrow's your last day, bud. And I managed to talk with some folks, and guess what, you're gonna be guarding the castle's front gates." said Onyx as he managed to hook his buddy up by getting a position that was sure to get him noticed and promoted.

"Yeah, that's great," said Emerald as his drink arrived, and he began to sip it when it finally registered what was said and spat it out immediately. "Wait, tomorrow?!"

Emerald blinked when he realized he had sprayed his lieutenant with his drink.

"S-sorry bud, I..."

"No worries, Em. I was gonna take a shower tonight anyways," said Onyx as he began to wipe himself off.

Tomorrow, already? Has time really flown by?

It only felt like yesterday when he was caught with his hand in the cookie jar and was doing his job as Twilight's test subject for her independent study. And now... here he was... At the end. Emerald was caught off guard by that piece of information when he shouldn't have. But now, realizing that his time with Twilight was essential at its end, the guard had many thoughts running through his mind. The primary being of Twilight and how she would act knowing their independent study was reaching its end.

After their night of drinks, Emerald returned to his room as he looked to get some sleep. However, the thought that he would wake up and his final day as Twilight's guinea pig plagued his mind. It plagued his mind so much that he couldn't sleep properly; Emerald should be happy that he managed to tough it out and honor his responsibility of being Twilight's bodyguard for the moon after their incident in the library and that he would be getting a job that he could finally get recognized to be promoted after being a private for three years. Yet... why wasn't he? It wasn't something he just thought of; this was something he'd been thinking about since he agreed and signed the contract with the bookworm.

---

The start of Emerald's final day was different than usual. Upon getting whatever rest he could, the guard was contacted by Twilight through a scroll that she wanted to meet him at Donut Joe's for some breakfast. Other than a curious look, the guard complied as he soon arrived at the establishment and saw the bookworm at a table, reading.

"Hey!" called out Emerald to get the girl's attention.

"Hey," responded Twilight as she lifted her head from the book to acknowledge her test subject.

"So, why did you ask me here to come her-"

"Hold that thought," said Twilight as a plate of donuts arrived and was seated before the pair. "Hope you're hungry."

Before Emerald could say anything, his stomach began to growl as he was reminded he hadn't eaten yet. Feeling betrayed by his stomach, Emerald remained quiet and complied as he began munching on his donut plate. He didn't pay attention to Twilight, but he would have seen the studious unicorn smiling at him if he had. And it wasn't a smile she often wore as a mask during their experiments; it was a genuine smile.

"So, did you enjoy it?" asked Twilight as she sipped her tea.

"Yeah. It was delicious," stated Emerald.

"Good. So let me ask you: are you good at escape rooms?"

"Hmm."

Emerald's response was clarified when Twilight brought them to their destination. A building that had a glow-up sign on the front with several puzzle images on it. The guard was confused about why the lavender unicorn wanted to bring him here, but she was giddy like a filly and grabbed his hand to drag him inside. The two were given a room upon entering, and the door shut behind them. The guard approached the door to open it when he found it locked.

"Um, hello? The door's locked!" shouted Emerald.

"Of course it is," said Twilight as she stood without a care in the world. "We can't leave until we solve all the puzzles in this room to get the key for that door."

"And why did you pick this activity!" shouted Emerald as he looked at the mare.

"Because... I wanted us to do something fun."

"You mean for you," the guard bluntly responded, as he wasn't having fun.

"Yeah. So let's get started," said Twilight as she turned to begin to work on a puzzle.

"Oh, gees," sighed Emerald after facepalming and approaching the mare.

"I have a face and hands, but no fingers or arms? What am I?" said Twilight as she read the initial clue they were given for the room.

"Mmm. Well, I'd say a clock, but I don't see one in here," said Emerald as he looked about the room to see any sign of a clock to answer the riddle.

"I'm impressed you solved that riddle," said Twilight.

"Yeah, turns out not all royal guards are dumbasses," snickered Emerald as Twilight rolled her eyes at the guard for calling her out on saying that all royal guards were all muscle and no brain.

"Well, we may not have a clock, but... oh, we have a sundial!" said Twilight excitedly as she approached a sundial in the corner.

"Why didn't they just say that on the clue?" complained Emerald, wanting to escape this torture as quickly as possible.

While it may not have been Emerald's first idea of having fun, he just chose to play along with Twilight's idea. Little did he know that it wasn't just one single escape room they were doing, but several that were all connected. It was a miracle that he survived with the nerdy mare as she was having a ball.

While he may have let Twilight's mind run free and do almost all the work, he did find her energy and enthusiasm to be rather cute. Seeing the gears work in her brilliant mind and how it translated on her pretty face was a sight to behold, the way her eyes sparkled upon solving a puzzle and moving on to the next like it was nothing. After today, Emerald would miss seeing Twilight's face lit up in moments like these.

"Alright, last room," stated Twilight as they passed through a door leading into the final room.

The final room was, go figure, a library as it was filled with books. It was a small room with shelves on the walls; the wall in front of them had a cabinet and a portrait of Princess Celestia hanging. Emerald took it all in before looking at a table next to the door as it was a clue as to how to escape the final room.

"They say knowledge is power. But to leave this final room, you must find the correct book. Within is the key."

"Okay, so among these thousands of books, one of them must be the way out. Now the question is, which one?" wondered Twilight as she began to think.

Emerald just looked at the portrait of the ruler of Equestria as he noticed something off. He squinted to see that the eyes weren't looking at him but angled upward as if pointing at a certain section of the room. The guard approached the portrait and looked in the direction of the eyes as he noticed a nearby ladder.

"So, obviously, the key is a book. However, there's tons of books here," said Twilight as she began to ramble on.

"Yup," responded Emerald as he pulled the ladder; he saw the spot where Celestia's eyes were pointing and began to climb while not paying much attention to the bookworm.

"So, if I know my teacher as I do," boasted Twilight, "it means that one of these arcana books must be the key.

"Yeah, sure," responded Emerald as he reached the top of the ladder and looked about.

"But only narrows it down to 10,763. How else can we narrow it down?" wondered Twilight.

Emerald scanned the books near his level while looking for something related to the princess. He soon stopped as he noticed a book with a sun emblem on its side as it got his attention. The private pulled the book when he heard something click; he looked at the portrait as it began to lift, as behind it was a small tunnel.

"So, Emerald, I figured it out!" said Twilight, unaware that the guard already solved the puzzle. "It's..."

"Solved it!" shouted the stallion.

"What?" said Twilight as she turned to see the portrait of her mentor lifted and the tunnel. "How did you..."

"It was easy. Now let's get out!" stated Emerald, as he didn't want to explain.

"Ugg, fine!" groaned Twilight as she exited the tunnel with a grumble.

"Alright, are we done with this, 'cause I'm hungry?!" stated the guard as he had enough escape rooms and just opened the door to the end and walked out.

Twilight growled at Emerald's antics. The pair soon stopped by a Hayburger joint as the guard was amazed at how much the bookworm had ordered. If he thought she could eat before with the donuts, he was impressed again by the ten bags of food that the unicorn ordered, as almost everybody in the joint was amazed.

"Damn! I never pictured you to be the type to pig out," said Emerald at how Twilight immediately opened one of the bags of food and began to down the hay fries and hayburger in minutes while making noises.

"So good!" stated the mare with a mouthful of food as she walked out.

Emerald tossed some extra bits on the counter as he went after the mare with her pile of food. The pair made their way toward Twilight's tower as they passed by many ponies in the street who were stunned by the many bags of food that followed Twilight, who was enjoying her happy place. By the time they arrived, Twilight had finished her last meal and was licking her lips for any leftover sauce from the many hayburgers she had eaten.

"Thanks for lunch!" said Twilight.

"Yeah, just next time, tell me you're gonna eat like a pig, so I make sure to stock up on bits!" said Emerald as he had to pay a pretty big tab for all the hayburger deluxe that the studious mare ordered. "So... Twilight, we need to talk?"

"About what?" said the mare as they reached the top, with the unicorn heading over to her desk.

"Well, I'm not sure if you've been paying attention, but... today's my final day of being your bodyguard."

Twilight approached her desk and was going to go over some assignments for her mentor when she heard Emerald mention today being his last day serving her. While the guard didn't see her expression, Twilight was shown having some disgruntled.

"Yeah, I know," responded the mare calmly.

"So, as you know, that means I'll be moving on to my new assignment tomorrow. And... I just want to set the record straight between us. Make sure that we part ways on good terms and that there's nothing left between us that needs to be resolved." said Emerald.

"Part on good terms, huh?" said the studious mare as she was shown writing something down.

"Yeah. So, I want to talk about the independent study. With all the experiments that I've been performing for you and obeying the guidelines of the contract, it's clear you got enough data for this project, right?"

"Y-Yes," responded the unicorn a bit hesitantly.

"Yes to that, we're good, right?" asked Emerald for some clarification.

"Yes," answered the unicorn mare.

"Yes, to that question, right?"

"Yes."

The guard was confused as he didn't seem to understand what Twilight was saying. The mare sighed as she turned to look at the guard; the two ponies looked at each other as Twilight made some chairs appear by the table.

"Have a seat," instructed the mare as Emerald sat down while Twilight sat in the chair facing him.

The two just sat and didn't say anything as they just looked at each other. For Emerald, he was waiting to see what the mare would say, while Twilight was wondering how to put into words what she wanted to say.

"So, about the study. I appreciate all you've done to comply with it. Some of the things I instructed you to do were rather... unusual. But despite all that, you kept your word and fulfilled them. So, on that front, I am grateful that you helped me with my study. And that you fulfilled your job as my test subject despite me blackmailing you."

"Yeah, it... was challenging, I'll tell you. But, I'm a stallion of my word. It's how I was raised; my father said if I commit to doing something, I see it to the end. That and, well... you had me by my balls. Literally." stated Emerald.

Twilight cracked a small chuckle, hearing Emerald mention the blackmail.

"You wanna know a secret?" asked Twilight. "I wouldn't have told on you."

"What?" said the guard, flabbergasted at what he heard.

"I wouldn't have told. Don't get it twisted; just because I wouldn't tell that doesn't mean I could forget what you did. I set that punishment to help make sure you stuck to the guidelines. A bluff. But... really... it was moreso for me to make sure that I kept you here to do all those experiments. I... wanted you to be the subject." confessed Twilight as she looked away.

"Wow, I just... I don't know how to respond to that," said Emerald as he didn't know if he should be offended that Twilight tricked him or honored that the mare wanted him to be the core focus of her project.

Another moment of silence filled the void as the two ponies exchanged glances at each other.

"So... are we good? No tension between us?" asked Emerald, wanting to end this relationship and project on good terms.

"Well..." said Twilight as she stood up and turned her back to the guard; the mare made a scroll levitate near her as she looked at it. "There's one little thing left for the study to be completed."

"What's that?" asked the private.

"It's... something that requires both of us being... close. Very close."

"What is it?"

"Are you sure? This one, you... you can say no, and I would be fine. Mostly." mumbled the mare that last word to herself.

"Well, in that case... what do you need me to do?" asked Emerald.

"You're... you're gonna go through with it," asked Twilight.

"I said I'm a stallion of my word. Plus, you said the study isn't over yet. And the day isn't over yet, either. So..." said Emerald as Twilight had a tiny smile on her face. "Do you need me to start undress or what?" asked the guard.

Twilight made the scroll disappear as she took a deep breath. The mare turned at her guard before approaching him; she stood before Emerald, bent over, and grabbed both sides of his face. The studious unicorn then pulled him in as she pressed her lips to his; Emerald fell under Twilight's spell as he pulled the mare in to sit on his lap, which resulted in her putting her arms around his neck as they continued to kiss. They began to turn off their brains and let their emotions take control, as evidenced by their making out while embracing each other. After a few minutes, they separated to catch their breath.

"Wow..." said Twilight, placing her fingers on her lips.

The two ponies locked eyes while stroking the other's cheek. The look in both was different; it was a look neither had in the past or for any other of their experiments. For Twilight, she felt comfortable. She felt safe being in Emerald's touch. How he held her made it seem like he could absorb any pain and hurt she may have had. Looking at the guard, she had one thing that flooded her mind. Her brain now took control of the mare as, almost in a trance, she got off the stallion's lap and was on her hands and knees in front of him. She then found her target as she reached Emerald's shorts and fumbled with his zipper.

The guard saw the mare pulling his cock out as he expected Twilight to suck him off like usual. However, she didn't. Instead, he saw the lavender mare removing her panties under her skirt as she slid them down her legs. She stepped out of her underwater, but it still hung around her left boot. Twilight then got back on Emerald's lap as she grabbed his shaft with a free hand while positioning herself. It was then that Emerald knew what the mare was talking about: there being one final experiment. The studious unicorn wanted to cross the line that they set for themselves.

The guard looked at the mare, wanting to see her response. The look in her eyes reassured him that she did indeed want to go forward. She did want this. She wanted this. He couldn't resist it anymore. All his past attempts of holding back were set loose. Emerald took one last deep breath as Twilight lowered herself onto his shaft; the mare felt the warmth of his tip entering her opening. The feeling was indescribable. It was... unbelievable. The stallion heard her take quick breaths, slowly taking in his length. They both knew what was coming. They knew enough about sex to know what happens to mares when they lose their virginity. He locked eyes with her, asking if she wanted to do this. She kissed him. That was it.

Twilight impaled herself on Emerald's cock, popping her hymen as it sent a feeling and shockwave throughout her body. She wanted to cry but kept the scream inside, not wanting Emerald to think he was hurting her. He froze, unsure if she was all right to continue. After about a minute, he felt her relax as she sat in his lap, his full length buried deep in her pussy. She wrapped her legs around his waist as she began to grind.

"Twi-"

The guard looked to speak and ask about the mare's safety when she silenced him by pressing a finger to his lips. Twilight gave him a reassuring look.

"I'm good," said the mare as she continued to grind.

Emerald began to match the rhythm, the feeling of being inside of her almost beyond his understanding. He heard that sex was good, but this? This was... no words. The utter pleasure was mind-boggling. He felt Twilight grip the back of his shirt with her hands. The pain of her hymen breaking was gone. Once twisted in pain and hurt, her face portrayed happiness and bliss. Their breathing, movements, and heartbeats were all moving in perfect harmony. Twilight felt a feeling coming from her stomach, as did Emerald. The walls of her insides clenched around his meat, giving him extra stimulation. Their breathing became fast and rapid as their orgasms rippled through their bodies. His cock flooded her insides with his white seed. She gasped at the feeling. She felt so full and happy.

Twilight remained in Emerald's lap as the stallion remained in his chair and didn't fall out despite their grinding. However, right now, they were more focused on important matters. Emerald looked at the mare as he sighed of utter contentment. It registered in the pair of what they just did. After weeks and weeks, experiment after experiment, and it all led to this moment. The moment they just had. They did it.

The two had a million thoughts flowing through their minds after they realized they had just had sex with each other. And just like that, a switch inside both of them flipped on. It was like a fire was ignited in them as they began to move; Emerald grabbed hold of Twilight as he laid her on the floor before him. The fire in him erupted from his soul. It started as slow, low embers, but now, it was a raging forest fire of passion. The pair kept their eyes on each other, never once looking away.

Her legs were now positioned near his shoulders, and he almost kneeled on her hips. His still-hard cock was in her waiting pussy, as if guided by some invisible hand of fate. Wordlessly, he began to drive into her, harder than before, fueled by the fire in him. Twilight gasped, the pain of her broken hymen all but a distant memory. Replaced with only the intense throes of his hips. She wrapped her arms around his neck, holding onto him as if he were a dream and would vanish if she woke up. Each push, each pump, and each grind sent new waves of pleasure for the both of them. Their minds were lost in the sea of lust. Faster, faster, faster. Each motion was dictated by the pair's look at one another, each time having more meaning, more desire. All of it, the two needed, and right now, they were getting it. The tempo increased with each passing second until, finally, Emerald shot another load into her womb. The sudden rush of semen was all it took for Twilight to reach her climax.

As he collapsed off of her, the royal guard heard Twilight panting, matching his breathing. Neither said a word for what seemed like an eternity. He sat up, his eye reflecting his own clear state of mind.

"Twilight?" said Emerald.

"Yes?" responded the mare.

The guard stood up and offered his hand as he helped the mare up. He lifted her by her thighs as he turned and walked toward the mare's bed. He gently laid her on it as he turned his back to her to begin undressing. When Emerald removed his last bit of clothing, he turned to see Twilight sitting on her bed as she removed her clothes and was now nude like him. Her lavender, slender form, illuminated by the setting sun and rising pale moon, made her seem like a goddess. Her dark sapphire blue hair, moderate purple, and brilliant raspberry streaks splayed out behind her like a blanket of calming water. The fire had returned, this time, like a roaring fire in a fireplace. Welcoming and warming.

The guard climbed into bed as he approached the mare and kissed her deeply. It was a passionate and deep kiss, conveying all the feelings and emotions of the two in a single moment. He wrapped his arms around her nude form, memorizing every bump, every wrinkle, every little detail of her fur. Her hands were equally roaming through his mane, over his back. He broke the kiss to suck on the supple flesh of her neck. She tasted so sweet, like a ripe piece of fruit. He trailed down her neck, making his way down to her erect nipple. The tit vanished into his mouth as he sucked and licked it, causing Twilight to moan lustfully.

They soon shifted their position so the mare was on top of him, as her thighs rested on either side of Emerald's head. The mare rested her hands on the headboard as she gripped them while the stallion had his hands going toward her butt. For the stallion, he could feel the intense heat emitting from Twilight's glistening pussy as he licked his lips. The scent coming off also added the perfect seasoning to entice his senses, motivating his member to get hard again. Without a second thought, the guard dove in with his mouth, sending Twilight into a flurry of moans. Her thighs tightened upon feeling the contact of Emerald's tongue as he felt them pressing against the side of his head.

The stallion brushed her entrance with his tongue to set the pace as he got a few hip bucks from Twilight. Twilight brought one of her hands from the headboard to Emerald's head to serve as another grip holder as the long, slow licks from the guard became so blissful. While he kept his frontal assault, Emerald cared for Twilight's backside; his hands caressed her cheeks until they found her pussy. Two digits slipped inside her, and the guard could feel Twilight arch her back immediately, letting her mane fall over her shoulders as her head turned upward to let another strained moan into the air.

Emerald soon found his target as he dove his mouth back into Twilight's g-spot; Twilight's hand immediately went to grab the guard's head, making sure to avoid his horn as the pleasure was too much, and she let it take control, evoking her to moan. Her thighs tightened more as her toes curled to show how much pleasure she was in; her breathing became more shaky as she struggled to take some in with all the excited sounds she was letting out to signal what wonderful bliss she was experiencing.

For a moment, Emerald looked up from his tongue attack to see Twilight's tits bounce as it gave another motivation to the guard to make this mare on top of him feel good. He felt his member throbbing as it ached a bit, wanting so badly to feel the mare's inner caverns around it again, the sound of Twilight being pushed closer and closer to her orgasm. Hearing Twilight's cries of being lost in ecstasy boosted Emerald's confidence and drive, as he wanted to see the mare's face when she succumbed to her orgasm.

Twilight was starting to lose it, both in body and mind. The assault from the guard was too much to handle as her body shook, and she had to grip the headboard to keep from falling off. The feeling of his fingertips inside her made her wetter, which translated into her scent becoming stronger, which affected Emerald; it served as a distinct trigger as the stallion felt this primal urge to make this mare climax. To show his dominance over the mare that he was an alpha male. Emerald picked up the pace of his efforts as he was driven by this sexual urge to claim Twilight; he twirled her g-spot even faster and swirled his tongue harder against her clit.

"Please don't stop," Twilight breathlessly begged the stallion. "Please... please..."

Her response made Emerald go faster as his tongue danced around her clitoris. Twilight's body squirmed upon feeling the stallion's attack as the intense pleasure building up and about to release pushed her closer to that edge of relief. It wasn't long before it all happened.

Twilight's body tightened around Emerald's head; her body jerked around the feeling of Emerald's tongue as she fell forward. The guard kept the pressure up to make the mare feel good as he felt her cum on his face. Twilight's intense gasps and moans subsided as she descended from her sexual nirvana high. For Emerald, he felt a sense of pride in not only giving the mare the most pleasurable ride of her life but also the fact that he asserted his dominance over the more intelligent mare. The primal urge inside Emerald's mind remained, but it was tempered after seeing the fruits of his work. However, his cock throbbed extremely as it longed to feel the mare's pussy around it again so that he could defile her sacred sanctuary again.

Twilight was still coming down from her intense ride as her gasps became less sporadic. She was enjoying the feeling so much she didn't notice that Emerald was sliding himself into her. The sudden feeling of the guard's length and his mouth's attack on her nipple gave her a very high wave of pleasure to her core. The two were a chain of passion and ecstasy. His thrusts were slow and deep, sliding deep into her moisture cave. Her gasps and the slapping of flesh on flesh filled the air. She was going insane. She had to be. Her reason was drifting further and further away. Just as quickly as he drove into her, he pulled out. He motioned her to turn over, which she did without a word.

Twilight was on her hands and knees, with her bubble butt pointed at the guard. Almost teasing and enticing the young stallion to have his way with her, and the feeling inside her loins so badly ached for his shaft. He didn't disappoint, hovering over her back and entering her again. She missed it even though he was just in her a few seconds ago. She had to have it in her. She felt his hot breath on her ear as his head rested on her shoulder. She turned her head, allowing his tongue to enter her mouth. The force of his hips smashed against her body, the bed rocking to the movements. The guard wrapped his arms around her as he kept on thrusting, wanting more, wanting to feel her back, but more importantly, the mare herself. She felt his muscles as she moaned; the feeling of him hugging her like a pillow, and she would disappear by letting it go. He grasped one of her hands as he felt his climax coming. He groaned, almost growled, as he blew his load into her for the third time tonight.

Twilight's head dropped down after the orgasm, resting on one of the pillows on the bed. She could see underneath her and saw his cock pop out of her, a waterfall of sperm oozing out of herself and the penis. She couldn't believe it. To her surprise, it was still hard. After three shots, it was still hard. Was he really horny for her? It was insane. What was more insane was that she wanted it.

Emerald sat on his butt as Twilight turned around with her mouth open and licking her lips. Twilight's mouth drooled as she eyed her meal like a hungry predator; she was starving, and Emerald had the perfect meat to satisfy her hunger. She dove without hesitation and gobbled up Emerald's shaft in her mouth; it was incredible. Compared to her previous suckings, Emerald tasted more manly and robust. She couldn't place her finger on it, but there was something else added to this mix compared to their other times, a certain sweetiness that lingered on her senses. Was this how she tasted to the guard? Her head bobbed up and down on it at a furious pace. He made a sharp intake of air through his teeth at her enthusiasm. She was starving for his seed, and who was he to deny her? Almost on command, he shot his 4th load into her waiting mouth. Twilight didn't waste a single drop of the precious white cream as she swallowed it all in loud gulps.

"More..."

That was all Twilight said as Emerald fell on his back. The guard looked at his member to see it was still hard and raring to go. In the past, he often used those energy tonics Twilight made to get his cock hard, but right now, it was all adrenaline. All the sexual thoughts and energy he held back were being released and affecting the guard's sex drive; Emerald didn't know where he found this near-superpony amount of sexual energy, but he didn't care. If Twilight Sparkle wanted more, then he'd give her more. She crawled on top of him, wanting to take the wheel in this ship of sex they were both sailing on. Standing up a little, she positioned her still-wet pussy over his hardness and lowered herself onto it. They both gasped loudly, almost screaming at the new sensation. He felt the full weight of her body focus on his cock while she felt him through her being, reaching new places she didn't even know she had. After a minute of adjusting, she began to slowly grind against him, her butt cheeks jiggling and shaking with each pulse. He grabbed her head, giving her better balance and grip to focus more on pleasing them in this sensual act.

God, why did she feel so good? Why can't he stop? The simple fact is he couldn't.

All the teasing, making out, groping, kisses, hushed words of praise, longing, and wanting led up to this. The ultimate expression of their relationship. Every inch of fur, every strand on his head, every bone in his body, every cell in his blood screamed at him to keep going. He would keep going as long as she looked at him with those moderate purple eyes, urging him to keep going. Her grinding became fiercer and more urgent. She was getting close. So was he. Together. Together as it should be. Both brought their lips to meet as they kept on being connected. It had now evolved, and it blossomed into something truly wonderful. He grabbed her hips, feeling her tremble as yet another powerful orgasm rocketed through her nervous system.

The two ponies were in the throws of serious love-making. Twilight's legs were wrapped tightly around his waist as if preventing him from escaping from her, not that he wanted to. His arms entangled around her form, almost possessively holding a rare treasure. His hips were grinding into her slowly but with a steady pace. Their lips locked in a slow, passionate lip lock. Their eyes were firmly focused on each other as if the world around them didn't matter. The first thought for anybody if they saw them was that they were unreal. Even now, they still had the energy and stamina to have sex. The second thought would be much more meaningful. There was tenderness, a yearning, a close affection in this sexual act. The brushes of skin. The whispered words of care and devotion. The calming effect upon each other. This was beyond intercourse and the feelings of gratification that came with it. This was something else.

The tender, post-orgasm sensitivity had already worn off at the prospect of another round, and Emerald's member twitched inside of Twilight's clit, earning a soft coo out of her.

"Ready?" asked the mare.

Emerald didn't respond with words as he raised his hands to grip her thighs and thrust into her. The mare felt it as she moaned, feeling the shaft warmly fill her. Twilight placed her hands on the guard's chest to keep her from falling off and balancing herself while riding the cock she loved. The stallion couldn't get over the warm embrace of Twilight's inner walls as he felt them gripping his cock in a vice-like grip, not wanting to let it go. The force of his thrusts made Twilight's as the soft-spoken sounds he got from the mare as Emerald took a moment to look at the mare. Seeing her face, twisted in bliss pleasure, her near-perfect goddess body, and her soft fur made the studious mare more beautiful. In his mind, at this moment, Twilight was even more beautiful than the Princess of Equestria. Or maybe that was just his lust-filled mind talking. As the royal guard took all of the lavender unicorn's features, he felt a familiar feeling in his chest. He began to kiss every inch of the mare as he wanted to savor this moment; his hands moved to Twilight's back to help ease her down while he leaned up. He then dove his mouth to capture one of her breasts as it got a reaction from Twilight, who didn't expect that, as she removed her hands from his chest.

Twilight rested her chest on Emerald's as she let out a long, satisfied moan. His tongue danced around her coat, and the mare shuddered upon feeling it as the pleasure shot through her body. Every time Emerald explored Twilight's body with his mouth, it got her to make some new sounds as they motivated her to keep going and see if he could make the mare sing to the heavens just how good she felt.

Emerald's body also lit up from all this excitement and pleasure. Twilight's muscles tensed up with every thrust the guard gave her, coupled with him sucking off one of her breasts. Emerald's free hand kneaded Twilight's other breast, adding more pleasure to the mare than she almost yelled. The only sound that filled the room was their slaps and the moans from Twilight's voice. She dug her nails into the guard's shoulders and tensed up even more; Emerald took more risks with his tongue as it caused the bookworm to arch her back as her stomach pressed against him. Her nails dug deeper into his shoulder as a sharp moan escaped her lips, her pussy clenching even harder around Emerald's cock.

The slaps are barely enough to overcome her moans, but with one last arch of her back, Twilight lets out a long, strained moan and lets her inner walls convulse against Emerald's member yet again. After a certain deep thrust, Twilight let loose another orgasm as her pussy hugged Emerald's shaft tighter than ever before. The chain reaction set off as even the guard released everything he had and blasted off his semen inside the mare's cavern. The guard held onto the mare to ensure she didn't fall off and to give her wish of not wasting a single drop; every pulse of his member inside the mare sent another intense flame of ecstasy throughout Emerald's body and filled his mind with passion. In the end, his muscles gave out as he released his grip on the lavender goddess in his arms, his shaft slowly slipping out of her moist folds as the two gasped for air while looking at each other. Twilight nuzzled against the stallion below her as she rested her head against his neck; a soft hum broke from her lips as she snuggled closely against the guard. Emerald moved an arm to wrap around the mare and hugged her tightly to feel her skin against his as the warm feeling returned to their senses again.

---

When concentrating on a task or hobby, losing oneself in whatever they are doing is not uncommon. For this young pair, it was the sex. It was late into the night when they finally gave in to their need for rest. But by the time they had finished, both had climaxed ten times, though neither could keep that kind of information straight, given what they had just done. Emerald was completely spent, more tired than ever from any workout or past experiments he performed with or for Twilight. The young guard laid on the studious mare as she was also tired.

Both of them were covered in sweat and sexual juices. Their eyes were similar to people who had just eaten a big meal: tired, full, and utterly satisfied. His head was on her shoulder, buried in the pillow beneath them. Twilight's eyes stared up at the ceiling, half asleep and half awake.

"Twilight?" he spoke, half turning his head so she could hear him.

"Yeah?" she replied in a quiet, tender tone.

"Are you ok?" Emerald reached and caressed her soft, tender cheek.

"Yes. Yes, I am." she chuckled softly, nuzzling into the palm of his hand.

"Good." Emerald then booped her right on the nose, making her giggle.

"Are you ok?" she asked, stroking her lover's hair.

"I'm... tired," he replied, short of breath.

"It's ok. Just rest." Her soothing voice rang.

Using every bit of energy Emerald could muster, he drugged his hand to meet Twilight's hand. He interlaced his fingers between hers. Nothing more needed to be said on the subject.

He knew.

She knew.

Nothing else.

"Twilight..."

"Shhhh. Rest now. Just... rest."

With that, the guard passed out into a deep and restful sleep on top of the mare. Twilight smiled weakly, pulling him close, her hand buried deep into his hair. Cuddling next to him, she soon drifted off into dreamland. She felt safe and protected, as always, when he was nearby. This was their moment, their world, their own little piece of heaven, and they would stay here as long as they could. This was the best thing he could do for her. If anyone asked why he did such a thing, he would answer:

"She needed me."

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