Shinji Ikari took a wet shit into his massive diaper.

Prrrrrdddd

"Oop!" cooed the massive fat boy, sitting in his bariatric wheelchair as Kaworu pushed him along. "Hoo hoo, Kaworu-san, it's time for a poo poo!"

Plrrrtttt

Shinji was fatter than ever. He'd hit 409 kilograms the other day, finally cresting 900 standard pounds. He was an absolute whopper, a massive blob of fat flesh. Kaworu had recently gotten him a brand new bariatric wheelchair to accommodate Shinji's newfound girth. Barely a hundred standard pounds away from half a standard ton, the massively fattened former Eva pilot certainly hadn't walked anywhere in a while. He was completely dependent on Kaworu for the simple act of leaving his bed. But Shinji loved Kaworu so deeply and profoundly that this level of dependence excited and delighted him. He loved relying on Kaworu for everything. He loved how helpless he was without Kaworu, and how Kaworu was the key to his world. His dependency was satisfying and erotic to him. It fulfilled him to need Kaworu for everything.

Blllrrrbbdddd

His bulk was swathed in a pink muumuu with white flowers on it, the size of a large tent. The soft, billowing fabric draped expansively over his belly, which was the size of a children's swimming pool. Over his hips, which were as wide as a table. Over the fat expanse of his massive bottom, which expanded almost two meters from the edge of the left butt cheek to the edge of the right. He was a fine, fat boy. Well-fed and engorged. Kaworu had fed him well and expanded him nicely.

PLLRRRBBBDDDDD

In addition to being well-fed, Shinji was well-fucked. The son of Gendo Ikari was completely queer, and he loved taking dicks up his ass almost as much as he loved a full meal with desserts. As a result of years of sodomy, and larger and larger phalluses as the years had gone by, Shinji had been rendered completely fecally incontinent. Hence his pooping: he had no control left over his bowels, his rectum, or his sphincter, and his big belly made a lot of poop throughout the day because of how much he ate. And when it needed to come out, it was going to come out, and he could do absolutely nothing to stop it.

So Shinji wore diapers. Enormous, huge bariatric diapers that Kaworu custom-ordered. No standard size would have fit his expansive rump. A normals-sized woman could have worn one of Shinji's diapers as a poncho, there was so much of the crinkly fabric. His meaty slabs of back fat oozed down onto the tops of his diaper-clad ass cheeks. Sometimes the drooping lard of his upper arms even touched the tops of his butt cheeks, too. Shinji's upper arms had lots of fat on them. Shinji had lots of fat everywhere. And he and Kaworu were delighted.

Prrrdddd

"Heh heh, poo poo, poo poo," said Shinji, smiling and singing to himself. He could feel himself emptying, feel the warm mush of his feces settling into the back of the diaper. It made him feel secret, and naughty, and special. He could poop away in the middle of a crowded sidewalk and nobody knew about it. A mother was walking along with her children. Shinji smiled and gave them a wave. The littlest girl waved back. He chuckled and chortled. The little girl didn't know he was pooping. She didn't know he was emptying a mudslide of turds into his diaper. None of them did.

Bllrrrbbblllllddd

"Hmm hmm, this is a nice load, Kaworu-san," he said nonchalantly, gazing at his fat fingers. Kaworu had put nail polish on his fingernails a few days ago, a beautiful soft white. Shinji loved soft, feminine colors. White and pink and lavender and baby blue. He was a very effeminate, queer boy. When he talked, he talked with a very homosexual lisp. Kaworu had noticed him developing it over the last year.

PLRFBBTT

"Ooop!" cooed Shinji, mouth making an 'O' shape. He felt some hefty turds exit him just then. He was so loose in his anus that he didn't usually feel the passage of poop, but somethings thick logs caught his attention. As he reacted to the defecation, his fat face sloshed and rippled. Shinji had a face that was barely human. He looked like a livestock animal, with billowing, swollen cheeks that sagged heftily down from his face, and swelled to either side of his mouth to give him permanent dimples. He had fat, ripe jowls that made him look like a pig at the state fair, and between and down from the jowls sagged his chins, all three of them, his third chin by far the biggest and wattling and sloshing like the dewlap of a cow. Shinji's face was absurd and comical, full and fat and bloated. He looked like the puppet of a fat person, with his comically-small brown hair atop his head, and his slow-blinking, beady blue eyes.

Prrrrrdddd

Shinji gazed over his shoulder at Kaworu, his jowls and chins sloshing as he turned his head. "I am taking such a poop, Kaworu-san!" he said with a smile and a laugh. "This is gonna be a diaper-burster, I can tell!"

"Hopefully not literally, my pet," said Kaworu Nagisa, red eyes beaming down at his fat toy. "Otherwise we shall have to turn around, and you will not be able to get your ice cream."

"Oh, well, we'd better hope not, Kaworu-san," said Shinji. His hefty cheek had drooped over the side of his plump shoulder and sagged down his upper back. He looked like a creature, barely human at all. Like some fat hog monster.

Kaworu smiled gently. He patted Shinji's rolling bulge of back fat on his right side. "You are such a beautiful boy, Shinji-kun."

Shinj's hoggish face blushed. "Ohhh, Kaworu-san..." he closed his eyes and sighed lustfully. "You really are wonderful to me."

BLLLRRRFFBBBTT

Shinji gurgled contently in the back of his throat at the satisfaction of pooping away. And he licked his lips, eager for the desserts to come.