With a brief glance towards the doorway, the fox knew the coast was clear. He wouldn't have long, but the fox knew he could create quite the stench in the time it'd take his babysitter to cook. He adjusted himself, poising himself into a squat, rump mere inches above the surface of the couch. With his weight upon his ankles, the little fox was able to ball his paws up into little fists, popping a few veins at the hefty amount of pushing he was doing. In such a squat, the fox cub's diaper was pulled tight against his rump, almost in a wedgie - this was a little trick he'd learnt that'd help spread the mess about even more, and make changing him all the more difficult and icky. 

He stuck his bum out, rather cutely, and gave a final push. With a few wet sounding farts, his diaper rippled and rumbled, poofing out about an inch of so. His eyes went goofy as he felt the trapped flatus fill up his crinkly garment, expanding between his legs. Next came a soft crackling noise as he began to slowly fill that pamper. He went cross-eyed and his tongue flopped out as he began to ease the monolithic pressure building up inside, all just to spite his caretaker and his evil potty training. With a little, silly grunt, the fox declared to all whom might hear him, rather gleefully; "It's POTTY TIIIIME!". And with that, his mush barrelled out of his fluffy lil' rump, pushing firmly into his diaper-seat. The seat of his diaper began to tent outwards, the head of his dump forming a solid bulge. Once the diaper could expand no longer, the fox's mess began to pancake outwards, spreading across the inner surface of the tight-fitting diaper and completely sullying his once orange buttocks, now brown. 

The diaper's plastic surface seemed to ripple like waves in water as the farty-fox packed his pants, pushing out wet, squelching plops, the seat sagging lower and lower, until it met the couch and began to droop outwards, spreading between his legs. Stink lines seem to rise from the fox's pamps already, and none of the flies in the room dare even go near the stinker of a cub. As he kept on pushing, more and more poop filled every nook and cranny, the warm substance eventually bubbling up to the front of the fox's diaper, sullying that brown too. A firm, drooping bulge akin to a football sat warmly between the fox's orange fuzzy legs, tainting the surface below him with a smell akin to week-old babyfood, and other untold horrors. With his mid-section completely plastered in poop, the fox could finally declare this as padding well used! Drooping by several inches, his mud-packed garment squished and squelched with every shuffle, swaying slightly. 

And with that, his legs simply gave way~..

A resounding, rather sickening "SMRSH" filled the room as the fox's entire weight full ontop of his poopy throne, his diaper succumbing to max capacity. The plastic stretched and the leakguards were stained brown, only just containing the fox's sizeable load. He practically sunk into it like a beanbag, sitting comfortably in a mountain of warm mush. He giggled, babbling aplently too as the mush rushed across his rump, filling up the sides and moreso the front, causing his padded crotch to bulge outwards as his nasty, rancid business filled it up. In a rather boyish manner, the fox leaned to the side, lifting his leg up high; a signal to all around him that another stink-bomb was about to sound off. Without even grunting, he eased out a bassy, wet-sounding toot. It bubbled through all the mucky mess in his diaper like a hot-tub mud bath, sending his entire diaper into a fit of ripples. The couch amplified the sound, making it ring throughout the whole house. The found this absolutely hilarious, and just burst into a fit of giggles, rocking back and worth. Each rock, of course, spread the mess out further, making things all the more icky inside his pamps. The smell rising up was nothing short of ungodly, and certainly far from funny. 

With one rather silly, rather unhelpful statement, the fox commented on the current state he was in with a rather cheery; "I poooooooooooooped!"