A week with Twilight Sparkle
Monday
Hi, my name is Rainbow Jelly Cake but you can call me Jelly for short. I just recently moved here in ponyville and i'm for some reason feel lonely here because nopony wants to be a friend with a mare who still had bladder and bowel trouble. To be honest, wearing diapers isnt that bad except when you're being made fun of for something you can't controll. Mares and Stallions would give me a digusted or a scowl look on their faces. Some swishes their tails into my face that or dirt. I felt like leaving the village and never coming back. That was until a lavender mare walked up to me with a concerned look on her face. She was wearing a skirt long enough to cover her plot that was a little bigger...but i can't put a hoof on it at the moment.
"Dont listen to them. You can wear diapers for a long as you want." she whispered in my ear with a smile. i smiled back at her.
"What's your name, anyways?"
"Rainbow Jelly Cake, But you can call me Jelly."
"Well, Jelly. I'm Twilight Sparkle. Want to be friends?"
"Sure! I'm getting kind of lonely being alone."
"The Golden Oaks Library is just up ahead."
I followed the Lavender Unicorn behind her. As i did, what i saw shocked me. She was also wearing a diaper. Could she be incontinent too?
As we entered the library, a faint smell of  a foal's nursery room came and hit me like a bolt. What I saw was the next shocking thing. This was no ADULT library. This was a library built for foals with a changing table, diaper pail, baby toys, cribs, highchairs, everything built for a foal but the size for an adult.
"So, what do you think?" Twilight Asked with a smile.
Before i could answer, my stomach then growled for food as i blushed hard.
Twilight then told me to go to sit down in one of the highchairs while she went and prepared the food in the kitchen. I went over to one of the highchairs and i didnt have magic or wings so i climbed on there. It was hard at first, but i got the hang of it. When Twilight Came back from the kitchen my mouth dropped again for the third time as i saw a Baby Bottle with foalmula and Sweet Potato Puree.
"Aren't you gonna eat too, Twilight? This looks a littl----"
I was caught off by twilight putting the spoon into my mouth feeding me the puree with her magic.
"Oh no, silly filly. I already ate my lunch and it isnt this" Twilight smiled as she continued to feed me the puree.
The puree was pretty good for it to be sweet potato. As soon i was finished, she then handed the bottle to me. I began to drink relentlessly as if i was dehydrated. Then i felt another pressure in my tummy not as bad though. Twilight knew what it meant and she picked me up, puts me on her shoulder and proceeded to burp me. a loud burp came out, but i usually dont burp like that at all. 
Monday Evening
Hours passed as me and Twilight played with toys and the need to poop and pee came to my brain. Twilight was the same way. she then stood up and squats down, with a loud wet bubbly fart, she pushed and grunted until a faint smell of horseapples filled the air. Poop filled the front and back of her diaper. she sighed of relief when the last turd fell into her  diaper. With Satisfaction, she sat down with a squish and proceeded to smush her poop around with her hoof. she moaned as she rubbed deeper and deeper into her soiled mushy diaper. I saw that she loved being messy. Without Warning, I messed myself without noticing it. Curiosity, I began to sit down with a loud squish. I yelped when this happened. Twilight then stopped to walk over to my direction.
"I see that you'ved never went this far" Twilight said. She pressed a hoof against my diaper. I let a loud moan.
Twilight then took of her clothes to reveal her messy diaper, took her flank and rubbed her diaper. we both let out a sharp moan. 
"Further, Further, Twilight!" Your're almost there. I felt another few turds slip into my diaper. Twilight then stopped doing what she was doing to look at my face expression. i was drooling and my insides were tingling. she noticed another bulge at the bottom of my diaper. she smiled and blushed as she pushed a h0of hard against my diaper and began to make a turd play-doh. she watched my expression as i was moaning and drooling until i collapsed with exhaustion.
"Well, looks like somepony had fun. Sweet Dreams, Wittle Jewwy." and with that, she kissed me on the forehead goodnight.