Just as King Sombra reached the large doors to his personal bedroom, his servants left the room, visibly out of breath.

"Everythi - Phew! - everything's taken care off - Pant! - m-my King!"

Sombra nodded, not wasting breath on his underlings and walked past them into his bedroom.

In the middle of the room the Unicorn was laying on his king sized bed, resting on her belly with her round backside facing the eager King. In front of her the servants put up a large mirror, allowing her to watch him play with her and him to see her flustered face during their upcoming playtime.

Sombra licked his lips as he stepped towards his bed and his mare, setting aside his armor and cape.

"Oh, you really exhausted those little servants of yours," she giggled, "My, my, you must be really eager today!"

She smiled at his reflection in the mirror, slowly swaying her plump rump from side to side.

"Mhmmm...I've been thinking of you all day, my King!"

She gyrated her hips, first slowly but steadily increasing in speed until she felt her butt-cheeks smack together with loud claps, moaning to further entice him with the lewd display.

The lewd display only spurred on King Sombra even more. He now remembered why this mare was one of his favorites as he already felt his erection growing to full length.

He jumped on the bed and positioned himself behind her, his hind-legs behind her spread legs, so close that they already burrowed themselves slightly into the soft flesh of her backside.

With a loud SMACK! he planted his fore-hooves roughly on her full, round butt-cheeks.

She let out a loud mewl and bit her lip, her eyes fixated on her beautiful strong King, blushing deeply.

She wasn't lying when she said she looked forward to this moment. Sombra's mares were strictly forbidden to pleasure themselves. With how many mares he had collected for his harem, this could mean that sometimes a mare had to go without being rutted for a relatively long time.

To make matters more unbearable for her, her heat had started just this week. Being pampered all day, she would be touched, massaged all over her body, just not in the one place where she desired it the most at the moment. This was a special privilege reserved for King Sombra only.

Sombra rubbed her soft flanks - up, down, up down. He enjoyed feeling them stroke the underside of his erect tool as he pushed his hooves up, creating a fold that slowly vanished under the touch of his hooves as the pliable meat flowed back to its initial state, just so he could repeat the same move again.

The Unicorn moaned at the sensation through her closed mouth, closing her eyes, losing herself to the pleasure she gets from having her backside treated so roughly.

Sombra spread her cheeks apart, placing his hard member between them. He grunted as he began rubbing her fat ass in circular motions now, hotdogging the the mare's fat rump between her soft buns.

"Mmmhm, yes...ooh."

She opened her eyes again, watching herself being used as a mere masturbatory aid in the mirror with lidded eyes.

Sombra continued to rub his flesh along hers as he felt the underside of his rod getting wet. She was spraying her juices, her entrance winking wildly as if to encourage him to finally enter her, fill her with his potent seed.

He stepped back a bit, spreading her full cheeks again to allow himself to line up with her winking honeypot. He decided to tease her for a moment with his throbbing member, just barely rubbing her slick, eager entrance while looking her straight in the eye in the mirror. She had a pleading expression in her face, silently mouthing "please" again and again between heavy breaths.

Sombra decided that he had enough foreplay for tonight. It was time to rut a mare in a way only an all-powerful Dark Crystal King can.

As he reared up, a deep powerful roar escaping Sombra's throat, the Unicorn under him squealed in delight. She loved what was always coming next during these sessions.

Forcefully, Sombra planted his fore-hooves down, just above her hips. Pulling with his upper-body strength, he leveraged himself into her hips, pulling his hindquarters fast and roughly entered her wet tunnel, not stopping until he felt himself completely insider her.

He felt her soft flesh molding against his legs and hips as her full backside pushed against him.

"Oh yes my King, please rut me! Spank me!", she moaned as Sombra started pounding into her relentlessly, faster and faster, as if the fate of the world depended on it. Loud smacking noises could be heard every time he crashed his hips into hers, only to be overshadowed by her loud moans and his forceful grunts.

The Unicorn looked into the mirror, watching her self getting hammered by Sombra's tool. Each thrust sent ripples through her body, her fat butt-cheeks bouncing back and forth, only stopped by his fore-hooves resting on top of her hips.

Her tongue lolled out of her mouth. As her fore-legs finally gave out she just laid there and had her face pushed into the mattress. With each thrust she felt her insides burning up with new desire, making her scream in lust at her King.

"Unf, harder! YES!"

All she could think of right now was the feeling of getting filled. She wanted him to release his seed inside of her, flooding her most-inner chamber with his potent juices.

She lost herself in perverse memories, how he took her in, taught her to be his obedient slave, how he shaped her for his own pleasure. How he made her his fat butt-mare.

A sudden pang of pain interrupted her thoughts.

"AH! YES!"

Another one erupts from her right butt-cheek as Sombra slapped her again.

"Yes! SPANK ME!"

He smacked her fat flanks again and again, each time feeling how she tensed up, her slippery wet tunnel squeezing around his member. Sombra felt himself closing in to the edge. As a last effort, he put his fore-hooves back on her top of her hips and redoubled his ferocious efforts.

The Unicorn's moans rose in volume, getting more frequent until she basically just screamed.

"Ah-ah-ah-aaaah!"

Sombra grunted louder with the effort, his eyes flaring up with dark energy as he looked at her in the mirror, straight into her eyes.

Finally, she couldn't take it anymore.

Sombra felt her walls clench up around his member as she shuddered below him, releasing one final scream as her juices splattered against his hips. Her insides were coaxing him to release, pumping him for what it's worth.

With a final roar he finally climaxed. His member twitched as he felt the pressure build from the base, traveling all the way down his length until he began shooting copious amounts of his seed into the eager mare's waiting womb. With each spasm of his cock he pumped his hips into the mare, his groin smacking into the mare's juicy entrance. Soon the lewd smacking sound of their session was replaced with a even more lewd squelching noise, her insides still contracting, begging him to pump her with as much of his seed as possible.

After he was done, Sombra steadily pulled out his softening rod, now covered in both hers and his juices.

He dried himself up a bit before walking around the bed where the now limp Unicorn mare was lying. Her face was still all flustered and she was breathing heavily.

He leaned down and gave her a small peck on her cheek.

"You did good tonight. I enjoyed myself a lot."

"Th...thank you...my King..."

Sombra smiled to himself as the mare drifted of to some well earned sleep. He would allow her to sleep in his bed tonight.

Besides, the night was still young. He would enjoy her company some more later.

Author's Note

And here we have it, the first full on clop I posted on this site.
I hope you enjoyed reading it as much as I enjoyed writing it.

So, which mare do you think does Sombra pick for the next night?

Will he give in to the allure of Miss Mountainous, the biggest mare of his harem, and stuff her silly?
Maybe a crystal pony with a large, soft belly and a deep belly-button?
Or prehaps he picks an earth pony with remarkably fat teats?
Or have twins rub his member between their bellies?

Decisions, decisions...