Chapter 1: Comet Has Some Fun...
Author's Note
This is my first fanfiction to post digitally. I tried to write as best as I could, so I hope y'all like it 
FINAL WARNING! This is a smutfic. Do NOT continue reading if you arent in to diapers, messing, wetting, bdsm, other Abdl themes, or are under the legal age. Thank you
Chapter 1: Comet Has Some Fun...
"Babe come on!" Comet pleaded "Just a quicky!"
"I'd love to, but I'm running late, babe" Orion said, rather disappointed "Somepony has to pay the bills around here, and as much as I'd love to skip work to ravage you, babe, that's a luxury we simply can't afford, and I've already used up all of my vacation days on the same thing"
"heh... oh yeah..." Comet blushed.
"D'aaww! you look so cute when you blush like that!" Comet felt his face flush further. "Bye babe, I'll be sure to give you a fun time later tonight."
"Okay Ori..." Comet sighed as he watched Orion walk out the door.
Comet Tail watched through the blinds as Orion walked away from the house. He waited till he was at the end of their road, half hoping he would turn around and plow him against the wall like the slut he was. He never turned around. After he could no longer see his coltfriend, he ducked back into the house and walked up to their bedroom.
"I guess I'll have to take care of this myself" he thought aloud, "I can't wait all day." He checked to make sure he had locked the door for what seemed like the hundredth time. He walked towards the closet and opened the door. He reached towards the back of the closet and pulled out a small box with a pin-lock. He spun the dials to the correct position and opened the case. He looked around, to make sure he was alone, before returning to the box. He hesitantly reached both hooves in and pulled out a familiar white garment. It crinkled loudly as he handled it.
Oh if only he knew about this he thought but he can't! EVER! He'd never want a coltfriend who was into this... best keep it secret.... Though, it wasn't as if he hadn't fantasized about Orion doing this with him. He would imagine Orion holding him in his arms real close while he sat in a soaking wet diaper. But that would never happen. He decided to simply stop thinking about it.
He brought the diaper and the box over to the bed. He pulled out a changing mat from the box and spread it onto the matress. He reached for the powder and wipes before he began to unfold the diaper. It was mostly white with pink tapes. He lifted his legs and slid the padding under his flank. He twisted the powder cap and sprinkled a fine layer onto himself before rubbing into his more sensitive regions. He pulled the front of the padding up and peeled back the tapes, and secured the diaper to himself. The diaper was very thick, and that's just how he liked it...
He stood up and waddled over to the box. He unfolded a garment he had retrieved to reveal it as a onesie, coloured the same shade of blue as his mane. He held it up with his magic and stepped back into it. He finished clasping the buttons, and pulled both a stuffed phoenix and a pacifier that matched his onsie. He popped the paci into his mouth and waddled over to the bed, and lay down, cuddling his phoenix plushie.
After a few minutes of cuddling his toy, he noticed a pressure building in his bladder. uh oh... he thought baby has to go potty.... He tried to hold it, but to no avail. He soon gave in and relaxed as he felt warmth spread between his legs and his organ stiffen. He bit his lower lip as he soaked his diaper. Eventually, he had finally finished peeing. He pulled back the covers to check the damage. He thought it looked fine, no visable damage, as the diaper he wore was pretty thick.
He suckled on his pacifier, enjoying the warmth of his freshly soaked diaper. He loved wetting his diapers. Sometimes he would even wet himself and not even notice until he felt his diaper get warmer. In fact Comet was very excited about just having wet himself like the big foal he was, and eventually couldn't hold himself back anymore. He placed his hoof on the front of the soaked padding underneath his onesie and started rubbing his stiff member through the thick material which squished loudly with every movement he made. He panted and moaned as he sped up, diaper squishing even more vigorously. He soon reached his limit, however, and felt hot, stringy cum shoot into his waiting diaper as he moaned shakily.
"I'sa naughty little colt" Comet lisped through his paci. "Wook Fee-Fee" he said to his stuffie "I had a accident in my diadee again... I hope I dont get punished..." That was just Comet fantasizing again, however, as he didnt have a daddy to punish him for being naughty.... Tears welled up in his eyes as these thoughts crossed his mind. Soon he was bawling his eyes out, silenced by the pacifier he was still suckling on. "I want Daddy!" he cried. He sat there in tears in his wet, cum-filled diaper. He eventually settled down and fell asleep.
• • •
Orion was excited to come home to his coltfriends loving arms. He was very horny all day. He eagerly walked up to the appartment building, raised his hoof, and knocked against the oak door. He heard no one inside. He knocked again. Still nothing. He fumbled for his keys and unlocked the door
"Babe! I'm back from work!" He said as he stepped inside. He got no answer "Babe?" He walked upstairs and walked up to their bedroom door, to be met with a steady, rythmic suckling noise, as well as a foul smell.
Thoughts started going through Orion's mind. Did something happen to Comet? Would he open the door to find his adorable coltfriend laying dead across the floor? He could always just be asleep, but that was unlikely. Comet always looked forward to him coming home, he never slept without Orion next to him. With these fears in mind, he hesitantly turned the handle of the door, terrified of whatever it was he would soon see.