The library stretched before Spike like a labyrinth. No matter how many times he cleaned it, Twilight Sparkle seemed determined to expand it even further, rows-upon-rows of shelves neatly stacked and filled to the brim with all sorts of books. To her it was the pride of the Castle of Friendship. To him it was another nuisance he often had to deal with.

It was the downside every time Twilight's special day of the week rolled around. He swore she never truly took a day off, not unless he and the rest of the herd forced her. Even Rarity knew when to leave things to her assistants, and only Applejack was more pathological when it came to working her buns off. He carefully dusted and indexed each heavy tome, even though he wasn't sure how many ponies other than her bothered to check out the riches of contents here?

Twilight sailed through the air as she helped him, pushing a tray with her aura, her horn lit up as she lifted tones of books at once, and she meticulously checked his work. “So far so good! You're doing great as always, Spike!”

“Um, thanks, I guess.” At least now he was so tall he could easily reach any section, although he dared not spread his leathery wings here. He grumbled at her tiresome perfectionism. Yeah, he loved her dearly, but this was one aspect that weared on his nerves a smidge. His snout warped into a toothy grin as he watched her work from behind, his eyes slowly tracing over her averagely-endowed but well-shaped physique. His eyes turned to slits as his dragon instincts started to kick in, licking his chops as he daydreamed about taking her then-and-there, and he slapped his cheek to bring himself back to his senses.

But why not? This was supposed to be a day of fun, right? He padded up on all fours behind her, taking care not to scratch his claws on the floor, and he suddenly wrapped his hands around her midsection. She tensed up and squealed. “S-Spike?” She breathed a sigh of relief. Then locked up again when he traced over her hips. “Come on, Spike. We're supposed to be-”

“Working? Yeah, but we could both use some motivation. Not to mention a break!” He spread her thighs wider, tracing up the insides with his palms, before he slipped a digit into her vulva. She bit her lip and blushed as lubrication immediately ran down his finger, which he twisted to work his way in deeper. With his other hand, he tweaked her swelling love button, breathing in her sexual musk. Her wings unfurled to their full plume, her teats rising and falling as she sucked in rapid breaths.

She whispered, “What if we're caught?!”

“Come on. Nopony comes around here! Especially this early.” His own twin dragonhoods started to escape their sheaths, pink and moist and ridged on the undersides. He rubbed them upon her well-sculped buttocks, and her dock reflexively raised her tail, the universal way a mare helped communicate she was ready to mate. She looked back at him with an almost pained expression, her glistening cerise marehood winking and dripping, not wanting to openly beg him to take her.

Gently he wrapped his jaws around the nape of her neck, and bit down, not hard enough to break the skin; just to make her moan low as she submitted to him. He teased her lower holes, poking at her puckered asshole and foal canal with his tips, making her wiggle her bottom. She tensed up and cried out when he slid into her, pinning her against the shelf. His palms encircled her breasts, squeezing the fatty tissue, and pulling on nipples which went erect under his firm yet tender touch.

He started to slowly move his muscular hips, his soft underbelly pressed upon her slender back, his bulk casting a long shadow over his much smaller lover. Once he would've feared hurting her; now they were almost in perfect sync. “Spike, I love you.” She'd often repeat those words for assurance. She was the most insecure of his herd, which surprised him since she was one of the most powerful beings on Equestria, yet she couldn't help but constantly compare herself to Rarity and Applejack.

He'd told her many times she was just as important as them, but she'd still have these moments of doubts. He took special care to spend every moment he could with Sparkle on her day, to express in whatever ways he could how important she truly was.

Neither of them heard the clop of hooves as a pair of mares entered. Trixie's eyes went wide in the distance, seeing the pair openly rutting, and she opened her maw to speak when Starlight suddenly pressed a hoof over it. “Maybe we should let them be,” mused Glimmer with a low giggle. “Although...it's not like we're at fault for stumbling upon this?”

Trixie scrunched up her muzzle once she released it. “Trixie had no idea drakes were so well-equipped!”

Starlight's smile widened. “Why Trixie, is that envy I hear? I know Spike's herd sometimes shares him with close friends. I know you and Twilight still sometimes have your differences, but you could always ask her for a turn!”

“N-no! Trixie simply wishes to...observe, is all!” She kept staring at the couple shamelessly rutting as they lost all sense of their usual selves in the moment, Spike taking her a bit more fiercely as his eyes glazed over and his baser, more dominant instincts kicked in, his tail wrapping around her own to pull on it. Trixie squirmed while she watched, her loins starting to burn.

While Trixie and Starlight spent most of their time on the road, touring with the caravan, they would routinely return to visit their friends in Ponyville. They had casually become lovers to sate one-another's needs; nothing serious but usually suitable in a pinch. Luckily neither of them had ever entered a heat cycle they would either need a stallion to sate or risk riding out.

Glimmer turned as she started to leave, only to pause once Trixie trotted up to the lovers. “Wait-”

By the time Spike and Twilight noticed Trixie near them they were already past the point of no return. While Sparkle tensed up anew as her holes clenched around his throbbing dicks, her face fully red as it lewdly twisted and she started to gush all over his crotch, he proudly jutted out his chest with masculine pride to match his grin, gripping harder on one of Twi's buttocks and continuing to grope a tit while the other bounced and cast small flecks of sweat. He grunted and unloaded spray-after-spray into her slippery tunnels, which milked him for all they were worth, his balls continuing to slap her as she drained him dry.

Her stomach bloated from the cum sloshed in her womb, her eggs swimming in the hot, milky overflow. The shots he fired sent her over the brink repeatedly, eyes rolling skyward as she nearly crumpled under multiple orgasms making her quiver.

Trixie suddenly grabbed Twi's head with both forehooves, and pressed their snouts together in a deep kiss, shocking all of them. Not that she particularly cared. Their tongues danced as a bewildered Sparkle reluctantly accepted, even leaning back into it, savoring the warmth and taste which filled her. Starlight couldn't do more than stare at the sensual display, dumbfounded.

When Lulamoon finally withdrew with a wet smack their mouths were still connected by strings of saliva. “Not bad, Princess of Friendship.” She half-lidded her eyes, almost sounding sarcastic. “You are...adequate for Trixie's needs.”

Twilight narrowed her eyes, still huffing as the dragon pulled out, trying to muster some dignity despite the audible plop and the cum mixed with her own secretions oozing out on the floor. “What, don't tell me the 'Great and Powerful' Trixie thinks she can do better?” Maybe she'd regret this, but she looked back at Spike. “What do you say? Want Trixie to put her hoof in her mouth?” She couldn't afford to be shown up by the petty, arrogant stage magician in the bedroom of all things!

“If that's okay,” he said and she nodded. He studied Trixie who shot him a smirk so cocky it would shame Rainbow Dash. One that challenged him even more than Applejack. And he somehow got the sense she'd like it even rougher than Rarity. He suddenly felt this shameful urge to put her in her place. Just like Twilight wanted. “Alright. Don't say I didn't warn you...”

“Trixie knows all about dragon instincts,” she boasted. “I can take anything you throw my way!”

Starlight cocked an eyebrow. “Have you ever even been with a stallion before? Maybe you should take it easy.”

“Hush, Starlight. You're embarassing me.” She tossed her pointy hat to Glimmer, followed by her star-covered cape, then brushed back her silky mane with a flourish. “Don't hold back! Show Trixie what you've got!”

“You asked for it!” He stalked behind her, seized her mane with one hand and her tail with the other, lifting her off the floor. She wiggled in his grasp, eyes turning to saucers as if she was suddenly having second thoughts, but not wanting to protes and lose face before her audience. He pressed his half-erect shafts to her holes, tracing the outsides to help work him up, precum dripping from the tips which he smeared over the pink rim of her asshole and the shiny wetness of her foalhole.

She whined and chewed her lower lip. In truth she'd never been taken by a male before. The closest was Starlight with a strap on while they were locked away in her wagon to blow off stress. She started to win upon his sex, the tip all but inserted, her moisture running down his length. “D-don't tease Trixie too much. You don't have to start slow or how back like with Twilight!”

He grit his razor-sharp teeth and slammed his girths into both her fuckholes, spreading the soft flesh wide as he filled her. She whinnied as her tits bounced with each thrust. “Rut her harder,” called Twi with a laughed as she smacked Lulamoon hard on an asscheek with a hoof. The slap of flesh sounded. “Ack!” A red hoofprint adorned her doughy buttcheek.

But she refused to let up, raining more blows with her forehooves on Trix's buns, who cried out some more. Snorts sounded from Spike as black smoke clouds escaped his nostrils, as he slammed her harder-and-harder, using her like a living sex toy which made her flush all over. Her marehood winked when she came, an explosion of marecum spattering the area beneath.

But he continued to rapidly hump her, driving himself as roughly and deeply as he dared while his instincts continued to overwhelm him, Trixie whining even more while she rode out orgasm-after-orgasm, drenching her loins and her lover. Sparkle continued to beat her ass raw, driving the magician over the edge anew. He strained to hold his own release back, determined to keep her going until she couldn't take anymore. Not that it was easy when her slippery walls started to lustily suckle him!

“Hmmm,” mused Starlight in a whisper. “Maybe I should help them out?” She came behind Twilight, wrapped her forehooves around her midsection from the back, and took her horn within her mouth. She started to cry out in surprise, but it was swallowed by a moan, her length sucked upon in firm but slow and sensual strokes. She rolled her tongue around the width, feeling it twitch, Sparkle roughly groping the soft, fatty tissue of Trixie's Great and Powerful posterior.

Trixie howled when the drake started to blow his laod into her sex caverns. She swelled up under blast-after-blast, her eyes rolling about and her tongue lolling as she went limp. Her mane was a frazzled mess and tears of joy rained down cheeks split by a goofy smile. The dizzied magician slipped into unconsciousness, her insides churning with his virile seed, and he continued to hammer balls deep into her, draining out every last drop into her unconscious frame which continued to happily quiver.

A whine escaped a blushing Twi who struggled to speak. “I-is she o-okay?”

Starlight chuckled and withdrew her lips with a pop. “She's fine. Just overwhelmed from pleasure. I'm a bit jealous,” she admitted. “We've...went at it pretty hard, even to the point where she came a few times, but nothing on this level!”

Gently he removed himself from Trixie, and carefully drew her close to him, cuddling her and kissing her forehead. He looked to Twilight who smiled awkwardly, the insecurities obvious in her eyes. Spike decided it best not to tell her he'd love to sleep with Trixie on a regular basis. Wouldn't want her to misunderstand, after all. Still, he continued to stroke Trixie's mane as she quietly snored, kind of wishing he could spend some time with her, get to know her a little better. “You have to admit, she's a trooper!”

“Yes,” admitted Twilight who shared a warm laugh with them. “Hope we weren't too hard on her.”

“Nah, she just needs some rest. Probably a bath too,” oberved Starlight as she looked over her messy companion cradled in Spike's muscular arms. She smirked at him as she enveloped Lulamoon in her horn's aura and lifted her away, seeing his shoulders visibly slump ever-so-slightly as she took her away. “Don't worry, stud. I'm sure she'll be begging for another round or several after you rutted her silly!” She smacked his leathery butt with a giggle before carrying her from the library.

“Well, that was fun!” Spike chuckled with a rub of her belly.

Twilight stared incredulous at the pair while they left. “Sure was...but now we get to clean up the mess!” She clopped her forehooves happily while he groaned at all the fresh work he'd made for himself. Well, it'd been worth it!

Together the pair removed all the stains and smell of musk (Thankfully there were spells for that, plus none of the books had been damaged, or else Twilight would've had a heart attack!) until the area looked pristine. Lastly he scooped her up bridal-style, crushing her to his powerful chest, and she giggled with a mild blush. He kissed her temple and carried her to bed.

Of course he could rest for now, but within a couple of days Applejack's day-of-the-week would come, and he would have to fulfill his promise to her. She wanted to forego Zecora's contraceptive potions and test if ponies and dragons could successfully mate.

Knocking up Ember had been different. A foal was far more vulnerable, and would require his full commitment! Was he ready for such a task?

Author's Note

Wasn't certain whether GlimGlam would make an appearance in this series, but I decided why not?