Filling Greta
It was like watching someone gaining weight in fast motion, except my stomach had a bit more jiggle to it than simple fat would give. inch after inch added to my gut as gallon after gallon of dragon seed forced its way into me.
OutFoxxed!! - Part 1
Already the clone's features had changed, slightly, as the fur on his body had started to lighten and it looked like it had started to gain weight. the officers, watched the body slowly transform, for a moment before they too left the scene.
Breakroom Treats
He was gaining weight! he leaned into his belly; he was able to sink into it more with each passing second. pretty soon, he was tilting himself to keep his feet on the ground. vrghr moaned; he was getting so full!
Keith'n'Matt: Lost Control
The vet said it was good if i gained weight." "i'm not quite sure if i agree..." keith said and stabbed some ham with his fork. "umm, keith?" keith looked up. "yes?" "could you eat up quickly?" kath asked.
Evolution Part I: Chapter Nine
Although, while some tried at gaining weight for the perks and a chance at dominance over other dogs, the black lab managed it gracefully and seemingly without effort and certainly he had no mind for asserting himself over his brother canines.
A Day in Her Life
Suddenly, and it takes a moment for zephyr to notice this, her entire body begins to gain weight. her belly protrudes steadily while her legs and rump fill out straining her pants. "ahh, grant what's happening to me?! this isn't right!"
Thicker: Chapter Ten
He could still do things, even if he'd gained weight, and he wasn't going to let a bulging belly stop him as he grunted and wedged and wiggled himself in, using one hind paw on a lamp post for some leverage.
Sweet, sweet times
Wolf didn't notice it yet, but he gained weight. the chair he was on barely held up all that extra weight. the fat rolls looked bigger. some of them were new. but like some people say, more men to love and cuddle.
Ch3: Unite!
Mitsuki: "junjun, did you gain weight?" jun: "i don't want to hear that from _you!_ anyway, let's go inside." mitsuki: "who was that that you just had drop you off?" jun: "uh, a senpai of mine."
I Wish I Could Quit You
"as long as you remember to cut down on carbs now, because everyone gains weight after quitting, and you look like you might be up for twenty pounds more if you're not careful!" marge giggled and patted the leopard's belly.
Serving Queen Twilight (An MLP Jeeves Prompt, posted with permission)
Her belly bulged, plump not with actual gained weight but from the several copious loads that twilight's heavy balls had shot down her throat since she'd accepted the job of waking the queen up that morning, and a puddle of slick, glistening ejaculate grew
Breeding the first girl
She was glad she had followed mistress' instructions and eaten her triple meals until her belly was swollen every day for the past months to gain weight and a good reserve for healthy egg production.