Princess Cadence walked into the Apple Family home still unsure about the encounter she was about to have. It was hard to believe that less than twelve hours ago while searching for Applejack with a simple question about the royal dinner in Ponyville that night, she discovered Big Macintosh diapering himself in the barn. She felt guilty that she would be violating the sacred bond between her and her husband, but things weren't working out in the few months they had been married, and the love was fading rapidly. He was gone too often on Royal Guard duty, they couldn't find any chemistry in the bedroom when he was home, and the Canterlot rumor mill was running at full speed. It was too much to bear, and she needed an outlet. This mix of unseen events had lead her to accept this secret rendezvous with the stallion in the Apple Family.
Big Macintosh felt a different slew of emotions. It was astonishing that the one time he was caught, he met someone with similar interest. She told him that she was unsure if she could make it. She didn't know she could wiggle her way out of the royal dinner, but after playing the sick card and convincing her husband to go without her, she was now in the Apple Family home alone with Big Macintosh while everyone else was at the royal dinner.
Nothing was said between the two as they entered the living room, but Princess Cadence had come prepared. Her saddlebag was packed with all the necessities needed for foalsitting. She fluttered in the air just above Big Macintosh, looking him in the eye from a position of authority.
“Aw, who's the little one I'm going to be foalsitting tonight?”
Big Macintosh looked dumbfounded.
“Aw, come on. Don't be shy little guy! What's your name?”
“Big? Macintosh.”
“That's such a cute name! You must think you're a big boy!”
Cadence pinched Big Mac's cheeks. This was humiliating. She had come on so quickly. It all felt like a dream to Big Mac, and there was nothing he could do but play along.
“I am a big boy.”
“Isn't that cute?! Can you say 'Cadence', Wittle Macky?”
“My name isn't 'Wittle Macky'! It's Big Macintosh!” He sat down and pouted.
“Who's the bigger one here? Come on Wittle Macky, say 'Cadence'.”
“No!”
“If wittle baby is going to act like this, you won't be able to play with your favorite toys.”
“Toys? Okay. I'll be good Cadence.”
“I think the first thing we need to do is get you into a diaper. Your mommy didn't tell me your were potty trained, and we're not taking any risks tonight.”
“But Cadence!” Big Mac pounded his front hooves on the ground. Cadence spanked Big Mac's bottom several times.
“I will not have you disrespecting me! You don't want me to tell your mom that you were a bad boy, do you?”
“No.” Big Mac reluctantly said.
“Good. Now on your back.”
Big Mac happily followed that order. Cadence levitated her bag off of her back and pulled out a fresh, thick, train-print diaper.
“Okay. Lift, please.”
Big Mac lifted his legs as Cadence unfolded the diaper, pulled Big Mac's tail through, and put the diaper under him.
“Thank you. Oh! I'm almost forgetting something.” She pulled out wipes and powder, “We've got to make sure baby is clean and fresh!” She wiped around his waist and bottom. She then came up slowly to his testicles, massaging them gently with the wipe. She proceeded up to his erect penis, giving him a few slow, teasing strokes.
“Does Wittle Macky like that?”
He gave her a slow, reassuring nod.
“Well, if you can behave yourself, maybe we could play a couple of games before you go to bed.”
She put the wipe aside, and continued on. She applied powder, drew the diaper up snugly between his legs, gathered the tapes from the back, and applied them. It was a purposefully drawn out process, and the tease had not helped in calming down Big Mac's erection. He was surprised the tapes held so well, and he was glad because he didn't want out of that diaper for a while. It held him snug, and felt like being wrapped in a soft cloud. The powder felt cool and comfortable, and the diaper provided constant stimulation.
“Is that snug enough for you Wittle Macky?” Cadence asked as she rubbed the front of the diaper. “Mm-hmm!” he responded.
“You've been a good little filly so far. You deserve a reward.” At that moment, Cadence pulled out a slew of toys: blocks, cars, and action figures. “You play with these while I get a bottle of warm milk for you. But don't get into any trouble! I won't be far!”
Cadence proceeded to take the baby bottle from her saddlebag to the kitchen. She put a pot on the stove, and found a tall pitcher of milk in the icebox. She warmed the milk on the stove, checking often to make sure it didn't get too hot. Big Mac was playing in the other room, adding sound effects to every imaginary move he made; Cadence even smiled at how adorable this was.
The milk had gotten to the ideal temperature, and Cadence funneled it into the bottle, making sure to secure the cap tightly. “Okay. Time for your bottle,” she said as she walked backed into the living room. Big Mac immediately stopped playing and sat front-and-center before his foalsitter. She sat on the couch and patted her lap inviting Big Mac to lay on it. He happily obliged.
“Wait! We can't start feeding until Wittle Macky has his bib on. We don't need any messes!” Cadence wrapped the bib around Big Mac's neck, and levitated the bottle into feeding position. Big Mac began to suckle the bottle nipple ferociously.
“Whoa! Filly must have been really hungry!”
It seemed Big Mac had drank half of the bottle in one gulp before he began to slow down.
“There we go. That's more like it.” Cadence began to rock Big Mac slightly, a feat for someone her size.
“Hush now, quiet now,” she began to rub the front of his diaper again.
“It's time to lay your sleepy head.” They were now locked on each others eyes.
“Hush now, quiet now. It's time to go to bed.” Cadence continued to hum the lullaby until Big Mac finished his bottle.
The two somehow found a way to break from each other despite the natural fit.
“Stay here while I go wash your bottle out.” Not so long after she had come back to the living room, Big Mac spoke.
“Cadence?”
“Yes little one?”
“I think I wet my diapey...”
“That's okay. We'll just get you changed again.”
Big Mac instinctively flopped onto his back, and Cadence undid the tapes rather fast. “So,” Cadence pulled the diaper from underneath Big Mac.
“You've been a very good boy tonight.”
“I have, Cadence?”
Cadence was had now put another diaper underneath Big Mac and was wiping, “I think you deserve another reward.”
No sooner after finishing wiping Big Mac's penis, did Cadence begin to stroke it once again. She began slowly, teasing him longer. She picked up her pace. Faster and faster she went. Big Mac threw his head back in enjoyment He began to pant, breathing harder and harder., getting closer to exploding. She abruptly stopped. Big Mac looked down in near rage only to see her leaning in towards his cock. She teased the tip with her tongue and proceeded to swallow Big Mac's large penis in its entirety. The feeling of her warm and moist mouth over his cock was astonishing. A pleasurable feeling only rivaled by a recently wet diaper. Up and down her head went. It bobbed back and forth. Big Mac could not stop looking at Cadence fitting the entirety of his penis in her mouth. He was panting even harder than before. He threw his head back again knowing what was coming, “I'm close....”
“Mm-hmm.”
The pleasure became unbearable, and he could hold on no longer. He exploded. Cadence continued, bobbing up and down until the end of Big Mac's orgasm. She pulled up, holding every drop of cum in her mouth. She looked Big Mac in the eye, titled her head, smiled, and swallowed.
“Momma needs her milk too.”
Big Mac's penis was still throbbing. His hooves were above his head as he stared up the the ceiling. Cadence ran her hoof up along Big Mac's stomach as she leaned in and whispered, “If you're really a big boy, you'll fuck me like a stallion.”
Nothing more needed to be said, and the tables quickly with Cadence now on her back. Big Mac guided himself in slowly. Cadence gave a loud moan after Big Mac had pushed through her big vaginal lips. Big Mac begin slowly as both he and Cadence looked each other intimately. She leaned up to kiss him. He began to pick up the pace, now humping her moderately.
“Yes...” she moaned slowly, “Faster!” Big Mac humped her even faster.
“Go Big Mac, go. Fuck me harder!”
The pleasure was amazing for both. Waves of pleasure ran through Cadence's body. The tight fit of her vagina was bliss to Big Mac. Both of their heart rates were rising; their panting became deeper. A symphony of moans and panting filled the room.
“You're not a little boy any more. FUCK. ME. HARDER!” Cadence demanded. Big Mac went faster, deeper. His thrusting became stronger. The pleasure caused Cadence to move restlessly on the floor, flailing her legs, running her front hooves through her hair. Her eyes were closed and her head swiveled. With one strong last thrust, both climaxed. Cadence exploded with a feeling of bliss as she cried out a long, sensual moan. Big Mac was throbbing, having cum inside Cadence. He gave his last few thrusts, and nestled his head next to hers. They were still panting, sweating, and overrun with the feeling of orgasm.
“I guess I've got to call you Big Mac from now on.” Cadence whispered.
