A small Ponyta was wandering a marshland area, his flames burning low. He was tired and lost. Then, a huge Seismitoad approached and got hard at the sight of the Ponyta, a huge, bulging cock emerging on his body. His cock was the same height as him; 1.5 meters. It had many bulges on it that mimicked the bulges on Seismitoad's body.
With no mercy, the Seismitoad pinned the Ponyta down with both hands, ramming the entire cock up its ass. The Ponyta let out a sharp scream of pain, the bulging cock stretching it to what'd be considered impossible. The Seismitoad pulled out to the tip before slamming back in with even more force, continuing at a slow, steady pace.
"F-Faster..." whined Ponyta, slowly enjoying the huge dick fucking his ass. The Seismitoad obliged, bringing up the speed a bit and slamming his cock deeper, his balls slapping Ponyta's ass with a loud 'slap' noise.
"O-Oh, Seismitoad!" screamed Ponyta in lust. "F-Faster! Harder! Give me your all! F-Fill me with your bulging cock!"
Seismitoad began to slam in and out at rapid speed, every second slamming the 1.5 meter cock into Ponyta's ass harder and faster. He was the one who started this, but now Ponyta seemed to be in command of him and he was fine with that.
"Ohhhhhhh, y-yes! Fuck yes!" yelled Ponyta. "I-I want you t-to fill me! I-I can take your balls, too! Fill me! Stretch me to new limits!"
Seismitoad, with a grunt from the effort, shoved his huge, swelling balls inside Ponyta's ass with his next thrust. With difficulty, he pulled out and repeated, but his pace had gotten slower. He began to build up again until he reached his previous pace, his cock and balls hammering Ponyta's ass.
"OHHHHHHHHHHH, YES!" screamed Ponyta. "FILL ME! FILL ME!"
With a roar, Seismitoad began to cum, his sticky, white cum pouring into Ponyta's ass and swelling his insides. He continued pumping even as he came, the sticky cum sloshing around his giant cock as he came like a fire hose until all his load was gone to the last drop.
"D-don't stop!" moaned Ponyta. "I-I want more!"
Seismitoad's bulges on his cock began to swell; in fact, his whole cock began to expand. The 1.5 meter cock doubled in size to 3 meters and Ponyta screamed in joy as Seismitoad shoved the thick, swollen cock and balls into his ass again, his cock a blur as he hammered Ponyta at insane speeds that'd make a legend jealous.
"DEEPER! DEEEPER! MORE!" screamed Ponyta.
Obliging to his lover's demands, Seismitoad focused hard enough to undergo another cock expansion, his cock swelling even more, his balls bulging and Ponyta's ass stretching to insane limits as Seismitoad's cock reached a whopping 6 meters and slammed in and out at supersonic speed unimaginable by anyone not watching the scene.
With a mighty roar, Seismitoad came again, seemingly endless streams of cum spurting into Ponyta's ass. Ponyta screamed again and again, the cum neverending as Seismitoad continued to pound the horse all the while.
Finally, Seismitoad pulled out. There was no doubt though; they would definitely do this again.