"You're on!" the cyan pegasus exclaimed to her teal colored rival. Lightning Dust and Rainbow Dash were highly competitive ponies, with Rainbow constantly fighting to beat the smug Dust into the ground. Even after Lightning’s downfall at the academy, she continued her arrogant and self-righteous behavior.
“Good, then it’s settled. Meet me tomorrow. Good luck, you’re going to need it to even have a shot of beating me,” Lightning Dust proclaimed. Rainbow smirked as she saw the egotistical pony leave her presence.
The next day, Dust was flying to the prearranged location when a prismatic trail blitzed past her flank. Not wanting to be beaten, she increased her velocity to catch up with Rainbow Dash. Rainbow paid no attention to her rival, as she continued about to her destination. Lightning Dust noticed that RD was wearing a black hoodie with a rather large bulge. To be honest, they did agree to having a rutting contest. It probably was the dildo that they were going to use.
Little did she know how wrong she was. When the two landed, Dash revealed what was under her hoodie, a thick, fourteen inch cock, leaking with extreme sexual arousal. Lightning Dust was only able to stare at it, words unable to form in her mouth. Luckily, Dash had took the initiative, and after a boatload of teasing, shoved her massive erection into her mesmerized partner. Rainbow rammed her cock, ignoring all resistance as she tunneled her way through Dust’s tight vaginal walls.
Dust moaned as she felt the titanic penis throb and fill her previously empty snatch, stuffing it with firm penal flesh. Dash’s lukewarm precum sizzled as it drenched Lightning Dust’s emblazoned pussy. Dash groaned as she continued to senselessly rut her previous team leader, as Dust screamed as Dash’s tip clinged onto her rigid walls. Pain annihilated her mind; the pegasus was simply not ready, but on the other hoof, she didn’t want Dash to stop. Rainbow Dash stared down at the gigantic bulge forming in her rival’s belly, massaging it with her hoof as she grinned proudly. Screw the stallions, she had the largest penis in all of Equestria.
Dash’s cock throbbed in tune with her athletic heartrate, bulging outward slightly every time her heart pounded. Dust’s cheeks flushed with heated tones of passionate red hues. Sweat trickled from her forehead down to the bridge of her snout, but she didn’t give it any notice. The teal pegasus wanted to be fucked to oblivion for all she cared. That is, until Dash gave her rival’s bulbous clit a small tweak with her forehoof. Pleasure skyrocketed through Dust’s body, neutralizing any previous pangs she felt from being penetrated so deep and so rough. Dear Celestia, she didn’t even care if she wouldn't ever be considered for the Wonderbolts again if she could live her life just experiencing Rainbow’s thick, meaty stallionhood.
Suddenly Dust felt a heavy throb rattle inside her cunt. Her folds clamped down, forming an incredibly formidable seal around the huge cock stuffed inside of her. Her body shifted to autopilot, preparing for the inevitable…
Dash’s cock flared wide, stretching Dust’s pussy to almost a breaking point. Pain smeared with large globs of pleasure overtook the teal pegasus’s body before Rainbow broke the accelerated moaning with a bellowing announcement.
“I’m cumming!”
Her cock pulsated as sexual liquids came rushing through her urethra, extending her width as it raced to her flared tip. Cum burst through the cyan mare’s cockhole, literally filling her partner as Dust reciprocated the action. The well endowed mare’s balls churned and throbbed as they emptied gallons of thick, gooey stallion seed into Lighting Dust’s womb. Litres upon litres of sensual fluids painted the mare’s walls whiter than a fresh snowfall. Dust twitched as she felt the cum expand her belly, bulging it outward in an attempt to make room for Dash’s immense orgasm.
Rainbow rock her hips forward, her crotch embracing her partner’s sweaty rump as she struggled to push her cock even deeper. Dust let out a breathless yelp as she felt her walls unable to release her marecum. She felt lightheaded, her brain stuck on endless sexual pleasure being forced inside of her. A chuckle parted the thick, musty mist surrounding the two ponies as Dust wearily looked up to notice that Dash was still pumping her stomach full of cum. Her eyes bulged out of their sockets momentarily. She couldn’t believe that Dash was still shooting loads of sperm inside of her.
Bringing a hoof up to her bloated stomach, she rubbed the inflated skin as a low moan escaped her mouth. She enjoyed the give her stomach produced as she massaged the plump mound. The warmth from Rainbow’s seed radiated through her belly; it didn’t feel too hot but actually quite balmy like the soft sands graced with Celestia’s delicate touch in the Gallopagos Islands. Her eyes closed as she drifted into this pleasurable afterglow, undeterred by the fact she was still be pumped with more of Dash’s stringy cum.
Dash smiled as she looked down at her former wingmate, lost in pure ecstasy. But the cyan pony wasn’t done with her mare just yet. She still had a couple more gallons of seed in her fuzzy ballsack, and she wasn’t going to be finished anytime soon.
-Several hours later-
“Ahhhhhhhhh~” Rainbow sighed as she finally shot her last squirt of semen into her partner. She admired her work, confident that she had beaten her rival; no contest. Lightning Dust’s belly gurgled as it sloshed in unison with the ambient breeze. She looked like she was carrying at least two full grown colts inside of her. Dash beamed at the result, slowly pulling her thick endowment out of the bloated pegasus, dragging a torrent of stallion cum behind her. She poked at the inflated mare’s belly, chuckling at the how Dust’s stomach jiggled in response.
Dash held her breath as she pulled her softening cock out of Lightning’s snatch. Dust was holding her erection in a tight seal, and the friction it proposed onto the cyan mare’s shaft was electrifying. With a final pop, her endowment sprung free, sending Dash falling onto her flank. Her hips doused with her own marecum, her fur bunched together in sporadic sticky clusters. But in the end it was all worth it.
She embraced her sexy mare balloon before she drifted into a post-coital slumber.
Author's Note
Just a quick fic for a friend. Given the restrictions, I think I did well. I hope you were able to enjoy it!
