Author's Note

-I always imagined Sci-Twi’s ringtone as Marco's Space Unicorn ringtone, from Star Vs the Forces of Evil. Didn’t want to directly reference it… but it makes for some nice mental imagery. So, perhaps look it up before reading. ;)

Risks and Rewards

The sun shimmered off Canterlot City’s public library’s large window and chrome lined exterior. It was a pretty design, but Twilight had mostly been interested in it’s four story height. Four levels of texts, knowledge, and tech that was co-opted with the local college. It was Twilight’s home away from lab, even in her lessers days at Crystal Prep. And luckily for Twilight, while large, the building had several key hours of low attendance(which she catalogued). Library’s were meant to be free of distractions after all. Though, today, Twilight decided to sneak in a distraction, for a distraction.

Twilight quietly closed the main door. Her cloths a simple blue shirt and purple skirt. She, has tried to distance herself from Crystal Prep’s checkered uniforms. And found this color combo, topped off by a star symbol, somehow relaxing. In a nostalgic sort of way.
Twilight turned around and completed her ritual of taking a whiff of the old patrement odor that fills the place. Most found the mold like smell, sicening, but Twilight always found it soothing. Though, today, it did add a bit of anxiety. But... she had found she enjoys taking a few risks.

It had only been a few months since she discovered that side of herself. It started, mostly simple, with allowing Spike to help her, relieve stress. Not too many orgasms later, she returned the favor. Not that she didn’t enjoy giving Spike blowjobs. The way he squirmed before gushing into her was both adorable, and a major turn on. Though, she did prefer when Spike cummed in her sex. The sensation of her vagina’s walls being pumped full of hot semen with no place to go. Her entrance sealed by Spike’s throbbing knot, where she liked to imagine, while technically impossible, that she could feel every little Spike squirming around in her.

Though, Twilight enjoyed Spike and her sessions, she didn’t just stop at the basics. She performed many, experiments. Most were a fun spice up; like arranging pillows for a proper cowgirl. Others, disappointing. Twilight honestly expected more from anal intercourse. All the research material hyped it up so much. But it just left her more sore than pleasured. However, she hoped today’s experiment would bear more fruit.

“Twilight, are you really sure you want to do this,” Spike mumbled as he popped his head slightly out from her book bag. Twilight snapped out from her daydream, and shushed Spike as she swerved behind a bookshelf.

“Spike, you can’t come out yet. Dogs aren’t exactly allowed if you remember,” Twilight said as she pushed Spike back into her bag, and made eye contact.

“Well, neither is sex,” Spike replied with an eye roll.

Twilight blushed at Spike’s words, and glanced around making sure no one else heard her plans. Luckily, albeit statistically, today was the most deserted time. Twilight liked the risk of what she was doing, combing the two things she enjoyed most, but she didn’t want unnecessary risks. She was already known as a weird kid...

Twilight relaxed her back, and sighed.

“Spike. We’ve already been over this, everything will be fine. Better in fact.”

Twilight grinned mischievously.

“And I know you are interested as well.”

Spike looked away from Twilight , and gulped. He was ashamed to admit she was right. Luckily, half of his body was hid in her bag. Preventing her from seeing how interested he was. Twilight’s, curiosities overwhelmed him at times, but he did enjoy the ride.

“But, but what if we get caught?” Spike, his number one assistant side, managed to squeak out.

Twilight stood straight, and adjusted her glasses. Her smile shifted to a boastful stance.

“Don’t worry. I did all the calculations; twice. This is absolutely the perfect time to--”

--Twilight froze, and grew pale. Through the bookshelves she caught a glimpse of two, all too familiar hairdews. One light pink, and the other red and yellow.

Twilight pushed Spike back into her bag, and bolted deeper into the library as fast as she could manage, without looking suspicious. She briefly caught the soft whispers of Fluttershy and Sunset Shimmer’s conversation before they faded away.

“Let’s move on to step b,” Twilight mumbled to herself

Twilight gently shut the a bathroom’s swing door. She took a deep breath, and relaxed in the library’s lower floor bathroom. It was not the library’s largest, with only 4 stalls, but it was the least used. Making it perfect, and more sanitary, for Twilight’s next experiment.

Spike pops his head out from Twilight’s bag, and looks over her shoulder.

“Twilight?”

Twilight rustles his head with a free hand.

“Don’t worry, just a few uncalculated variables, that have now been filled in.”

Spike raises an eyebrow.

“We were not spotted, so it’s time.”

“Oh,” Spike replied with a blush hidden under his cheek’s fur.

Twilight walked over to the rear stall connected to the wall. That one, she had previously concluded, was the optimal choice being the most distance from the door, and also the stall with a baby changing rack, perfect for holding her bag.

Twilight shut the door, and fastened the lock. Well, attempted to fasten. Her hand was only able to jiggle it about a sliver of an inch in. The lock being misaligned was another uncalculated variable. It was one she didn’t mind though. No one would disturb them, as at that time of day, this restroom had a 0% use rate. Though she wouldn’t admit it, she enjoyed the added risk.

Twilight placed her bag and Spike on the changing station, and pulled out her assistant with benefits out from her bag by his shoulder blades. Spike looked completely anxious, which she found simply adorable. Twilight placed Spike down on the baby changing station, which with him standing, conveniently brought him just under eye level. However, Spike distinctly tried to avoid making eye contact, but failed every couple of seconds.

“So, so what now?” Spike mumbled.

“Oh?” Twilight questioned, and followed with a mischievous giggle as she stared under his legs. “I think you know what comes next.”

Spike jolted, and glanced away from Twilight. His blush no longer able to be hidden by his fur alone as he realized little Spike had betrayed his confidence once again. He didn’t have much time to ponder his embarrassment, as Twilight leaned in for a deep kiss that sucked in his tongue, and left her number one assistant barely able to stand on 4 paws.

“Now, roll over.”

Spike followed his mistress’s commands. Though, he less rolled over, and more tumbled to one side with his four paws finally giving out. This did not matter, as Twilight gently adjusted her assistant; spreading his legs to reveal his partial erection on full display.

Twilight giggled as she sucked in the Spike’s tip. Her tongue stretched and squeezed his semi-flaccid cock like clay as he slowly grew stiff inside her. Her right hand fondled his balls to aid in his growth in her mouth. Twilight loved the texture of his penis, and more noticeably, loved the salted, musky taste & smell.

Twilight’s gag reflexes gave her a warning. Spike’s knot had grown faster than expected; by 23 sec to be precise. Normally, as normal as their sessions could be, this would be her favorite part of a felleto. She loved toying with his knot until he cummed the volume of a small bucket down her throat… on her chest… face… Twilight liked variety. However, today twilight had a different objective.

Twilight reluctantly slid her head back until Spike’s lower head popped free. A droplet of precum dripped down his length, taunting and tempting her. She formed a mischievous grin to hide her temptation. She had bigger plans after all, and couldn't let things end at the warm up.
It took Spike a few seconds of bliss to realize Twilight had left him hanging and throbbing. By the time he managed to glance around his length, Twilight had already moved on to the main experiment. Though, she waited for her number one assistant to come to his senses before dropping her skirt to the floor, revealing her white panties decorated only with a black paw print right above her clit. They were one of her spevial panties for these experiments. A little small, but Twilight found that advantageous.

Twilight turned around and quietly lowered the top seat on the toilet. She wasn’t worried about the bang of the seat slamming down, albeit it was annoying. Twilight really just wanted to ensure Spike got a full view of her assets. She quietly chuckled at her mental pun.
Spike rolled over and up onto his paws with more than enough time to see the top of Twilight’s cheeks peeking through her outgrown panties. Worse yet, even what was covered left little to his imagination, as the white cloth firmly clinged to her tight ass.His gaze lingered while his mind tried to catch up to what had happened, and was going to. He of course new beforehand, but now the mental images were finally joining the party.

Twilight turned around, and caught Spike quickly glancing away nerviously. She grinned knowing he got the preview. She then lifted him up by the shoulders, pretending not to notice his erection (too much).

“Are you ready?” Twilight asked with a soothing gaze into Spike eyes.

Spike gulped.

“Yes, if, um… you are.”

Twilight placed Spike atop the toilet seat, and bent down onto the bathroom floor. Her knees rested comfortably on her skirt, but her hands got a cold chill that traveled her body when she placed them on the tile floor. She then leaned her still panty covered rear back until the damp spot above her slit was half an inch away from Spike’s nose. Spike glanced away, embarrassed.

“Um… I , I think you forgot something...”

Twilight glanced back, with a devilish grin.

“No. Now, open your present,” Twilight said with a slight shake of her ass.

“Oh… OH!”

Spike gulped. He trembled as he stepped to the edge of the seat, and stretched out his neck. His mouth opened wide as it approached the top seam of Twilight’s panties. Spike’s warm breath draped across Twilight’s rear, and down across her slit.
Spike flinched as he started to bite down, but after a deep breath, he clamped his teeth down on Twilight’s panties. He gently started tugging them free centimeter, by centimeter.

Spike, distracted by the unnerving quietness of such a taboo thing, lost his footing briefly. His cold nose dipped into Twilight’s love tunnel, and sent a shiver through her whole body that ended in the briefest of moans.

Spike decided to play off his mistake, and flickered his tongue into Twilight. Not that he didn’t want to. He always loved Twilight’s taste, and the feeling of her muscles tensing up with pleasure from his tongue. Even when he was a normal dog, he loved helping Twilight in this way.
Spike pulled himself free from Twilight’s folds; his mouth dripping in her juices. Her panties were still dangling between her legs, but Spike’s accidental assistance pushed them fully out of the way of her glistening pussy.

“You… you ready?” Spike said as he glanced away from Twilight. Twilight chuckled.

“I think you are more than aware that I’m ready, from your position.”

Spike took another deep breath, then placed his front paws above Twilight ass. His cock slid across the top of her panties as he lifted himself up, and forward. Spike tip dipped into Twilight’s warmth with ease, and after adjusting his position above Twilight, he plunged his full length into her. Twilight whimpered as Spike shuttered. Spike’s instincts and lust started to kick in once again. Before he even realised it, his knot was bouncing off Twilight’s vulva again, and again. Each time, the knot spread her a little more.

The bathroom’s door bolted open with a bang, and Twilight and Spike jolted. They froze, both pale and silent. Fortunately, and unfortunately for Twilight, not before Spike finally managed to pop his knot in, and kick off her first orgasm of the day. Twilight had to bite her lip to keep quiet as her body spasmed, and juices trickled down her leg. She was in ecstasy, but ashamed of herself. Her calculations were wrong again, and worse yet, she was getting off on the idea of getting caught. But, she took some solace that it couldn’t get worse.

“Twilight, are you in here?” Fluttershy’s soft voice asked from the bathroom’s entrance. “I was sure I seen her come over here,” Sunset mused.
Twilight turned ghostly pale. The ride was no longer fun.

Sunset’s heels echoed as she stepped towards the main mirror and sinks. Her gaze peering down the row of closed stalls. Fluttershy’s glanced back and forward at the door, doubting if she had seen Twilight head over here afterall.

“Twi?” Sunset called.

Luckily for Twilight, Spike panicked quietly like her. Unfortunately, he did not panic peacefully. His whole body was trembling violently, including the parts still inserted in her. He was shaking as much as the vibrator she once had. Except, unlike that, Spike’s cock was warm, tight, and ready to cum buckets any second. Twilight bit her lip harder, till she tasted the iron of blood. She never had an orgasm drag on this long. She hated that fact, yet how could she not love it. However, love or hate, she was running out of breath trying not to breath.

“Guess she’s not here,”Sunset said as she hunched her shoulders, and walked back over to Fluttershy. “Let’s try subatomic physics.”
Sunset and Fluttershy left the bathroom. The swing door fluttering back and forward loudly as their steps faded away.

Twilight gasped for air when she was sure her friends were gone. Her front collapsing down to her elbows as she took deep breaths.

“That, was, close.” Twilight managed to gasp.

“Too close. We, we need to stop.” Spike replied, as he collapsed on Twilight’s rear. His knot still throbbing within her.

Twilight twitched, and raised herself off her elbows as she glanced back at Spike. Her devilish grin made him flinch.

“No Spike. Not when we’re this close.” Twilight said before she giggled. “Well, you’re so close.”

Spike gulped. He knew at that moment, he was not leaving until he creamed Twilight’s pie. He hated when she got like this. Her obsessive compulsive nature mixing explosively with her lust. Yet… he too also enjoyed that part of her. He still loved Rarity, but also really, really liked being Twilight’s number one assistant with benefits.

“Fine. I guess it is the fastest way to get it out anyway.” Spike said as he rolled his eyes.
Spike lifted himself back up, and realighned himself. With only a brief moment of hesitation, he thrust into Twilight. His knot kept him from ever leaving Twilight’s warmth, but he had sagged back an inch or two. His thrust, and the next, and next got those inches back, with interest. Twilight’s orgasm left her extra lubricated. This allowed Spike to thrust faster, and faster. Twilight not to be left out, loved the feeling of Spike’s penis growing mid-sex.

Spike’s front legs gave out, and his head collapsed onto Twilight while his hips continued their assault. Twilight glanced back to find her number one assistant tensed up with his eyes closed. She recognized that sign, and smirked.

“I think someone is re--”

--Spike’s body jolted, and he came. He twitched as waves of cum squirted into Twilight, flooding her with a familiar warmth. Twilight giggled.

“I take that as a yes.”

Not wanting to waste the opportunity, Twilight shifted her weight to one arm, and moved the other towards her sex. Several fingers stroked what was left unsubmerged of Spike’s manhood. Her index in contrast focused on her clit. With the sensation of Spike’s cum still warming her, it didn’t take many clockwise twirls before Twilight moaned softly, and joined Spike’s orgasm.

Twilight’s second orgasm brought the experiment to an end, as her new fluids and spasms helped pop Spike’s knot free. The rest of his erection quickly followed as Spike fell backward onto the toilet seat. His lower stomach drenched in both their fluids while his erection still stood at full mast.

With Spike free, Twilight, stiffly lifted herself up. Once mostly stable on her feet, she glanced down to her vulva to find a continuous stream of cum dripping down onto her skirt. She sighed.

“Well, that is why I brought a spare.”

Twilight’s phone rang from her bag, and made her jump. She reached into her vibrating bag, and pulled out her phone as lyrics about Space

Unicorns blared. Sunset’s chibi avatar flickered on the screen. Twilight sighed.

“I guess I’ll have to make up something for them,” Twilight mused as she put her phone down on the baby changer, the song continuing. She ignored her ringtone’s sound as she started inspecting her shirt. Too distracted inspecting for cum stains to notice the sounnd of the bathroom door swinging open again.

Twilight glanced down to her assistant, and found Spike in his usual post orgasm daze. While she found it annoying he was so easily knocked out, she did find it adorable. Especially when she had to wake him up. She stroked his shrinking cock sending a jolt through his body. Spike glanced up half asleep to see Twilight fondling him with his cum still dripping out from her pussy, and her phone’s ringtone blaring loudly.

“Spike, were you having a nice drea--”

--A knock on the her bathroom stall’s door froze Twilight & Spike as their hearts skipped several beats. Twilight only had enough time to mechanically turn her head towards the door before the third knock nudged it free from it’s broken lock. The door slowly panned open to reveal Fluttershy & Sunset Shimmer standing side by side. Both having a clear view of Twilight, eyes wide like an owl, fondling Spike’s erection while white, creamy liquid dripped down her legs, and onto her discarded skirt and panties. Excluding the tunes of unicorns in space, several seconds of silence followed before Twilight’s mind started to reboot.

“He, hello. Sunset… Fluttershy… How’s the weather?” Twilight asked with the shallowest of breaths.

Fluttershy just silently stared back. Her mouth covered by both hands, but even they couldn’t hide her crimson red blush.

Sunset, in contrast, nonchalantly observed Twilight and Spike. Her eyes bounced between Twilight, Spike, and Twilight’s cum soaked skirt as she pieced together the situation before finally speaking.

“Huh...”