@James A Williams  
Do this one. https://derpibooru.org/images/2239253?q=artist%3Aprincebluemoon3

@Background Pony #5FB0  
They make the rockin’ world go ’round!

@Careless Whisper  
Glad you enjoyed it! Yeah, I took a liking to your description for the original, so I couldn’t help but implement it in some way. Thanks for the kind words.

@Astrum  
Amazing work. I especially love how you used elements from my headcannon comment on the post of the original sketch.

Silverstream lit up then, and squeezed him tighter for a moment before then gently letting him go so their sides could separate again and the two turned to look at each other. Her eyes once again met his with that seductive glare and smirk. “Hmmm, well then, I’d say it’s time you check my rump too. What do you say?…”, she cooed devilishly. “W-whoa, wait, wait, take it easy, Silverstream, I’m not-“, Gallus was cut off before he could prevent her from forward and standing directly in front of him. The ground seemed to shake again as she planted herself directly in front of Gallus, presenting her massive rear to him in all its grandeur. Just as soon as he had started to gain his bearings, Gallus had lost his composure again at the presence of this new position. The large orchid globes loomed over him, her light blue tail dangling in between the two swollen cheeks. Silverstream craned her head back to gaze into Gallus, those lidded, deep purple eyes beckoning him to worship her form. “U-uh…Silverstream…”, Gallus attempted another objection. But before he could get it out, Silverstream suddenly backed up and pressed her ginormous ass into his face. “Mmph!”, the griffon yelped in shock under hundreds of pounds of hippogriff fat. “Oooo~…”, Silverstream moaned as she drove all of her girth onto Gallus, her swollen cheeks swallowing up his whole front body. He reflexively placed his claws square on both as it startled him.
 
“Mmmmmhhh, you like this fat hippogriff rump, little griffon boy?…”, Silverstream’s tone had added a sprinkle of dominance on top of her still sweet hum. Without thinking, Gallus grasped a handful of each cheek, a rush she felt from there all the way up her spine. She gave her posterior a slow shake, pressing further, deeper onto Gallus, solely focused on enveloping as much of the griffon as she could. It was just as warm, soft, and gargantuan as her belly. It was at this point, with Silverstream eagerly pouring it on him, him grabbing hold of it with all his might, and how intimate he was with her, Gallus finally shed his inhibitions. “Screw it”, he thought, and squeezed Silverstream’s rump as tightly as he could and dug his face into it. “Mmmmmmhhhhh~”, he loudly groaned as he embraced and fondled every inch of her. Silverstream felt shockwaves across her body, shaking and wobbling as Gallus unleashed his bottled up adoration upon her. They kept at this for only a brief several seconds before they finally separated, Gallus pulling his head out with a gasp for air and a stupid wide grin across his face and Silverstream panting and murmuring under her breaths. She then rotated her wide frame back around and the two faced each other again, each now gazing dotingly at the other.
 
Before either could think of anything to say, Gallus lept onto Silverstream, wrapping his forelegs around her thick neck and straddling his hind legs about her massive upper belly, locking his beak with hers and kissing her with a passion rarely seen by the normally lax griffon. Silverstream’s eyes shot wide open in surprise for a moment before she registered what he was doing, then fluttered closes as she melted into returning the kiss and his embrace. They held together for about a minute before the need for air overwhelmed them and their action ceased.
 
When their beaks parted, their eyes glided back open and were greeted by the others’. They stared for a couple seconds, lost in each other’s gaze, before finally regaining their faculties. Still breathing heavy, they silently paused for a very brief moment, before bursting out laughing at the embarrassing display of getting rather carried away in a public setting. Not that they cared much at that point.
 
After chuckling a good while, they relaxed and looked back at each other before Gallus finally spoke. “Okay! Okay, okay, okay…”, he said rolling his head and eyes with a proudly defeated smirk. “I like all of it. Belly, rump, head, face, all of it! You are just….you’re just awesome….”, Gallus had finally confessed. “Hehe, good answer~…”, Silverstream replied, leaning back in for them to have a tender beak nuzzle before settling back again to gazing at each other. “You’re pretty awesome too”, she stated sweetly. “Even though you’re a big dork who tries to act like a tough guy when he’s really a softie on the inside”, she laughed. “Yeah, I know”, he chuckled. “But you can’t blame a guy for trying, right?”. The two laughed a good bit at their comments before settling down and gazing lovingly at each other again.
 
“Hey, you wanna chill here with me until school lets out?”, Gallus asked. “I’d love that~…”, Silverstream replied. The pair then remained embraced, lost in each other’s eyes for the remainder of the day.

Silverstream continued her slow approach toward Gallus, the two locked on each other, with her face loving yet alluring and his adoring yet petrified, until her midsection aligned with his head. She then leaned her weight to her right and into Gallus. At first the side of her belly merely glided over his right cheek, which was already enough to frazzle him, but she then started easing more of her onto his body as it brushed further down his head to his neck, abdomen, waist, until she was pressing against the whole right side of his body. “S-Silverstream!…”, he exclaimed in an almost whispered yell as she moved across and pressed onto him. The cloud-like softness, the gentle stroke of her feathers, the therapeutic warmth, all were a massage of his senses. Where his face had just embodied apprehension mixed with intrigue, Gallus felt it lightening, the pit in his chest filling with fervor, his eyes soothing, a refreshing exhale escaping his lips as he felt the embrace of what he so desperately craved in secret. The tension he had just been wrestling with was now at last starting to lessen, or at least be diluted by the rush of more positive sensations overwhelming him. He now almost found himself wondering why he protested her advances to begin with.
 
“Mmmmm…”, he heard Silverstream give a soft moan as she brushed and pressed against him, followed by an amused giggle. Gallus could feel and hear that she was enjoying it every bit as much as he was. She reveled in feeling the puny griffon nuzzled against her gut, even leaning slightly back into it like a sideways mattress, not only for the sensation itself but also the realization that Gallus was actually delighted by the act, just as she had suspected. Wanting to test her theory a bit further, when she had stopped with her whole side covering his, she gave her belly a little shake, smothering him deeper and around each inch of his body that it could reach. The euphoric feeling evoked further giggles from her, and Gallus even surprisingly gave a little chuckle as it enveloped him, the cracks in his shell of denial widening.
 
“Hmmm, looks like you have more of a thing for this than you let on, Gal, hehe…”, she teased. “Wha? I-…uuuhhh…”, he stammered in response to her comment. She just laughed more at his awkward apprehensiveness. She decided she had tortured him long enough and slowly broke contact with him. As she eased off, he, seemingly out of impulse, had his lean follow her until they fully separated, upon which Gallus quickly came to and caught himself as he nearly stumbled to his right, then briskly giving his head a shake, recomposing himself. To put it simply, Silverstream had to keep her own enthusiasm from making her coo at how adorable she found his stumble. He then tried in vain to reassert his nonchalant stance and blow off his supposed moment of weakness. “I, uuuhhh…I don’t know what you’re talking about…”, he grumbled, his cheeks reacquiring their deep red hue. “Hehe, sure you don’t, tough guy~”, she lovingly mocked, finding no end to his swaggering attitude.
 
Before Gallus could even attempt to reiterate his opinion, Silverstream whipped back around to his side, wrapped her foreleg around his back, and pulled him into her. “Hey, what are you-aagh!” He was now sandwiched between her side belly and one of her pillowy forelegs. “Hey, what’s the big idea?!”. While he was becoming relatively more comfortable with the situation, this also ironically enabled him to be more vocal in his protests. “Well since you like this huuuuuge belly so much, I figured you might like being stuck between it and another soft place~.” She was right. And he hated it. But that didn’t keep him from audibly moaning as he was gently wedged into her embrace, and Silverstream shivered and echoed his joy as she wrapped him in her supple hold. Much like a few seconds ago, ecstasy and enveloped Gallus and tension was melting away, only even more so thanks to him being surrounded on both sides. He would’ve expected his claustrophobia to set in at this point, if not for the circumstances. But there was a new feeling, however: safety.
 
He couldn’t put his finger on it, but he felt both shameless pleasure and security here. Ironic, considering he was stuck between colossal masses of weight from which he couldn’t hope to escape unless another party allowed it, but he nonetheless felt something resembling his contentedness earlier this morning, if not something more. Before he could mull over it more, he felt an entirely new touch. He looked down and saw Silverstream’s claw, slowly scratching his upper chest, stroking between the puffy tufts of feathers and flitting the tips of them as it floated down to scratch upward again. Now he couldn’t remember what he was attempting to solve.
 
It wasn’t just him, though. Silverstream didn’t think she would particularly enjoy this new size she had acquired, especially with the awkward stares she received from many fellow students, but doing this now with Gallus had proven her wrong in a way she never expected. This was driving her mad with excitement. Feeling his small, slender frame pressing against hers, smothering him with her gargantuan oversized belly, tucking and gently squeezing him between her bulging curves, surrounding him with her warmth. It was pure ecstasy. She also couldn’t shake this sense of serenity with him. She felt like she was, indeed, keeping him safe. Thinking about the cold, bleak streets of Griffonstone, no family or close friends to receive tender affection from, let alone keep warm with, confide in, and so forth, she found it a tragedy that Gallus was missing that. Having him here, he was warm, snug, and safe. Perhaps that’s even a reason he finds bigger girls more attractive, she thought in amusement as she kept caressing him.
 
He looked up at Silverstream with a curious eye. Noticing his now slightly more subdued expression, she gave that bubbly giggle again at his look, still sensual but endeared by his increasingly relaxed state . “Hehe, you comfy there, Gallus?”, she asked cheerfully. Rather than argue, the griffon gave a genuine grin and nodded at the hippogriff before drooping his head back down and nuzzling up to her breast. Silverstream was elated; Gallus finally seemed to be admitting his enjoyment, though still with a thin layer of gruffness. Listening to her heartbeat, sensing her immense chest rise, Gallus felt it too; a growing desire welling up inside him. He swallowed his pride and spoke up. “Y-Yeah…I think I am..”, he said hesitantly.

(Phew, got this done. Made it a bit longer than I really should’ve, but this picture was just too awesome not to try to write something good for it. Took some inspiration from what people shared on the post of the original drawing. Hopefully it doesn’t seem too rushed and someone enjoys it! I need to just make a Fimfiction account already. lol)
 
This was impossible. Utterly ridiculous. Proposterous. He couldn’t think of enough words to describe what was happening right now, the sensations bearing down on his mind. For the first time in his life, he had nothing smart to say, no witty or facetious comment, no wisecrack to bust him out of the uncomfortable situation he was being met with. Gallus, in all his bravado, had his weaknesses, just like all creatures, whether hoofed or pawed. And a big weakness was rapidly encroaching upon him.
 
Gallus rarely felt genuine content, let alone joy. At school at least, there was usually always something annoying him to a degree; a boring lecture, a fellow student repulsively their smacking lips during lunch, the classroom being too hot or cold. But today. Today there was nothing. Maybe it was just his confidence in having aced that test after hours of painstaking review. Perhaps anticipation for the buckball game later that afternoon. It’s likely that he just got decent sleep for once; as rare as it is for him, it would make sense to feel particular elation at such a lucky occurrence. A partial reason he was willing to admit to himself, however, was that he was pleased that his friend Silverstream seemed to be much happier herself for the last couple of days.
 
The break had been rather unforgiving of Silverstream’s indulgences. What started as winter weight quickly turned into her ballooning to several times her prior size by the time the semester began. At that point, Silverstream was easily one of the largest students at the school and undeniably the largest hippogriff. While it was fortunate no one had gone as far as to mock her, most everyone had certainly noticed the change, which caused a bit of discomfort for Silverstream on top of the nervousness that came with adjusting to her new form. But oddly enough, Gallus had realized that she had suddenly become much more chipper and relaxed as of late. He suspected that she had just gotten more comfortable moving her newfound weight around, but also decided it was good enough to just know that she was feeling better. What added to his content, though he had no plan of expressing it, was to look at her as well; while many of his peers looked at Silverstream in surprise at the change, Gallus often found himself gawking at her from across the hall or classroom. Each time, he had to catch himself before she or another student caught wind of his admiration. It was especially difficult when he had to speak near or, Celestia forbid, to her; there isn’t much one can do to hide thorough blushing or embarrassing stammers. But he was quite the clever and suave griffon, so of course it was of little issue to divert his friends and peers. His fear now was that he had eluded all of them. All except one.
 
“Hi Gallus!”, Silverstream’s greeting yanked him back into reality. With his eyes also finding their way out of the tunnel vision, he realized Silverstream standing directly before him. Or he assumed she was; all he saw at first was a wall of pillowy, orchid-colored chest and upper stomach towering over him and swelling out toward his face, about a foot away from his beak. As he rose his head to look at her, his apprehension rose with it, and finally met his eyes with hers atop the mountain of luscious hippogriff. U-ummmm, h-…h-hi, S-S-Silverstream….”, he squeaked, his normally vibrant blue face having become a canvas painted with tomato red astonishment. His eyes exploded open as it finally dawned on him all that was before him.
 
Silverstream was…Celestia, she was titanic, the first word he could consciously register and internally vocalize in what felt like a lifetime. As a hippogriff, she was already taller than most of the other students and even some of the school staff, but with her now present girth, she made him feel like a pitiful parasprite. Her whole body was ballooned to ludicrous proportions: her once thin neck had become a thick tree trunk topped with a couple of spare chins and bloated cheeks on that ever-lovely face of hers. Her neck-trunk led into a full, luxurious bosom, further padded by silky feathers, and her legs had become voluptuous cushions that tapered into small, slightly plump claws. Her round belly, despite Silverstream’s natural height, was so massive it almost brushed the ground; walking over a particularly tall piece of grass could cause a pleasantly ticklish sensation on her underbelly. Just as impressive was how wide it was. Even directly facing her, her girth visibly reached across the length of two grown stallions, enough to also fully cover both if they were placed under it. Add the fact that all of that girth, all of that splendid belly despite its incredible size and heft, swayed with a surprising elegance from Silverstream’s every movement. And flanking her gut was her was gigantic rump, two swollen and wobbling cakes jiggling and oscillating with her every step. It also astonishingly jutted out from her sides when facing her directly, adding more and even larger curves to her already gargantuan build. And to put more direct emphasis on her height, she utterly towered over Gallus by at least 2 feet, forcing him to crane his neck in order to look at her while up close. All together, the sheer size of her in every regard was almost daunting to him. It might’ve made the situation even more imposing, if not for her friendly demeanor and bubbly personality.
 
What felt like an hour he had taken to absorb all that he was seeing, it was actually only another second before Gallus shook his head into sanity and tried to compose himself as he smiled back at his friend. “Hehe, I’m not interrupting you, am I?”, she queried, concerned that she had interfered with some much needed alone time he had planned. “W-what?! N-no, I’m just…chilling here as usual. Y’know, quiet spot behind the school, no one around; i-it’s nice to be away from the hustle and bustle every once in a while, heh…”, he answered with the grace of a dancing Ursa Minor. “Giggle ‘Hustle and bustle’? Sounds like fun! I could use the break too; mind if I join you?”. “J-join? Uh, yeah sure, heheh”, he replied with a hint of external and much internal joy at the proposal. “Good, hehe. Because I have…something to ask you.” His growing joy was suddenly paired with a piercing anxiety. “W-what?”. “Hehe, you heard me, you dork…”, she returned coyly. Gallus gulped a thousand pounds of anticipation and secrecy down his pained throat. He knew what Silverstream was getting at.
 
“So…”, her eyes dropped and glimmered at the small griffon as her tongue rolled out the inquiry. “I’ve noticed that you seem to be kinda… nervous when I’m around. Almost distracted…like you’re enjoying what you see…”. Gallus only remained silent as she went on. “I’m curious, Gallus…do you…have a thing for all this new size I’ve gained?…”. His chest sank. His mouth was agape as if preparing to respond for a moment, until he simply closed it and grew redder than ever. He saw a wave of confirmation then wash over Silverstream’s face. She gasped and then giggled at the revelation, leaving Gallus to believe he had officially reached the end of his life. She let him wallow in this state for a moment until he could readjust himself, struggling to reacquire eye contact with her. Silverstream’s demeanor became more sly and she suddenly shifted toward Gallus.
 
The huge hippogriff took a step forward and rotated herself around, all with a seductive sway, to stand side by side with Gallus. She slowly raised up her pillowy left foreleg , her claw hovering over her lower chest, and then looked down at him with sultry eyes. With that, he was even more thrown off his game. She was suddenly much closer to him, her bulging frame almost grazing against his dwarfed one. “Wow…hehe…Gallus, I didn’t think you the type to like…hehe…big girls”. Gallus was in almost a full on panic now. “Wha…No! What gave you that idea?”, he said, now quickly looking away her from in order to fight the tension. She giggled again at his protests. “Well you’re blushing”, she countered. Her smirk grew into a mischievous grin and she heightened her stance, further accentuating her massively voluptuous body, before she conjured a devilish question. “Which do you like best: belly, head, or…hehe…my rump?”. If there was a point that could and him any hotter in the face, it was now. “Do I really need to answer that?…”, he replied, stroking his neck as if walls were quickly closing in around him.
 
“Hehe…maybe…but I can help you~…”, Silverstream answered. Gallus turned back around to ask what she meant by that, but before he could get it out, she had stepped forward a bit and turned around to face him. She then slowly strutted toward him. “W-whoa, hey!…”, he meekly protested, but Silverstream was quickly encroaching upon him. As she neared, he swore he could hear the ground shake and rumble, the earth itself buckling under, making room for Silverstream’s enormous girth. Her every footstep sent vibrations that shook and trapped Gallus in his place, her body language commanding that he stay right where she wanted him. All he could do was lock his eyes on her, her increasing approach, and her approaching gut, which she was now showing off even more as she made her advance, watching it swaying and flowing in that way he found so hypnotizing. Celestia, he did find the shape, the enormity of her belly ravishing. And it kept getting closer.

Fat bottomed ’griffs.

Very nice to see this one colored!

@Mugenlazlo  
I’m going to do that one in a few days. Don’t worry.

Do this one. https://derpibooru.org/2213430?q=artist%3Aprincebluemoon3

i got what you were going for, but the way the speech bubbles are layed out it makes the read order a bit awkward to figure out