Quiet fluffly footsteps, belonging to the young prince, could be heard sneaking around the house early in the morning, everyone was still asleep, and still would be for a few hours as the sun hasn't even come up yet. His older brother, who he shared a bedroom with, was out at a part time job he found recently, it wasnt anything big but it seemed interesting to Frisk so they took it, leaving the younger Asriel with a room all for himself, and he was gonna use this oportunity to finaly have some fun again after a while. As he was getting back up the stairs and into his room as quietly as he could, he was bringing a bunch of stuff with him, a bottle of water, a small camera, a small air tank and a hose. As soon as he got to his room he put down all the stuff on his bed and locked the door just in case. With a sigh and a hesitant look around he pulled down his pajama pants and shirt, leaving him naked. It was slightly chilly this morning but his fur and plans of what he was gonna do next were gonna protect him from the cold soon enough. The fluffy goat boy then put the bottle and camera on his nightstand, the air tank on the ground, and took the hose into his paws. His last hose was sadly found out in his hiding spot and used up by his dad, which was unfortunate but still better than the air tank being found. This new hose was thicker and allowed a much faster and bigger air income than the last one, which was gonna be a bit of a pain to get used to, but Asriel was way too excited to care much. He wet his fingers with his maw, and gently poked and probed his tail hole in preperations. Afterwards he quickly repositioned the hose and with a quick one two, it slid right in, leaving Asriel to moan gently into his paw to not wake up his parents by accident. The feeling of the bigger hose was surprisingly different than what Azzy imagined, but not in a bad way. Either way, the fluffy monster imidietly aimed for his bed and laid down, throwing his blanket over him and placing the air tank close next to him so he could reach it without any trouble. We connected the two and with a few deep breaths to calm down, he slowly twisted the valve on the tank and felt the slow breeze start to flow inside. Asriel's member was throbbing in his pj's the whole time he was preparing everything, and now the throbbing was only amplified as he got to feel the pleasurous preassure once again, he couldnt help but take the tank and twist the valve further and further until he found a good limit for how much he could take in one go, one of his paws laying and grabbing his fluffy bulge. The air that forced its way inside of the fluffy gut imidietly started to clump up inside, and soon enough the prince was starting to feel mild discomfort as his insides were stretched and started to grow. As the prince started to pant, he could hear and feel a loud, powerful gurgle from within him, his stomach upset with him torturing it like this, but he couldnt help it, he needed his fill somehow himself, afterall everyone has their thing, so this was normal...right? There was no time to ponder though as his gut kept growing at an uncomfortable speed, Asriel decided to put a stop to this, and slow down the tank at least a little, but as he tried he couldnt reach it over his belly now, he tried the hose itself vedged inside him, and that one he could still reach but not for long, he kept the speed the same then as he had no other choice, and just kept his paw on the hose right under his tail. As he grew more and more, his groans and moans were getting louder, his stomach tighter and more uncomfortable to deal with, he didnt wanna admit it but the pain was what he loved the most, pushing his limits and making it hurt more and more like an oversized balloon inching closer towards popping. Azzy pat his tum and completely ditched the hose, not caring anymore and just letting the air do whatever it wanted, as he looked around he couldnt even see his member over the giant fluffy behemoth, but he could definitely feel it painting his underbelly the best it could. All seemed to point towards the goat boys demise, but then. *Click, click* The door was unlocked and opened, his brother entering the pitch black room and not noticing the huge ball of a brother due to the darkness. "Hey Azzy, you awake?" Frisk tried to ask Asriel, for him only to let out some not so fake groans and moans once more. Asriels heart was pumping, not only from the fear of being found out, but also from how tight he felt, he knew he was gonna pop in a few seconds and he couldnt do anything about it. Then, more gurgles from within his gut and even a burp escaping from his maw sold him out. As Frisk got curious and confused, he walked towards his brothers bed, noticing the bigger and bigger ball that was in Asriels bed. "Azzy are you okay? Are you sick or-" As Asriel gritted his teeth to not let out anymore air, he maoned in a very sensual manner as his gut was ready to give out and his dignity just as much. *Pshhhhhhhhhhhh* suddenly, the barrage of air stopped. The prince was tearing up slightly but also preing all over the blanket and his fluff, not really sure what just happened. Then he feels it. A pair of human hands taking the blanket off of him and feeling the giant creacking stomach. They rustled around his fur, and teased his belly button, even pressing gently down on the gut to feel the preassure. Azzy was stunned and had no idea what to do, all he could do in the moment was gently mutter out "F-Frisk?" under his breath. He got sushed right after, the hands massaging the giant aching balloon, and leaning onto it gently. "This will be our secret, we cant let mom and dad know about you doing this, alright lil bro? But i have a request if we do this. You have to tell me when you're about to play like this, i might join, or at least make sure you dont hurt yourself permanently" Azzy couldnt believe this was really happening, but the feeling was way too real, the hands and the preassure kept him dazed, but he could utter quietly between his breaths and under his giant blush "..a-alright..." he groaned a little as Frisk slid his hand down to the throbbing friend Asriel was ignoring at the moment, stroking him slowly. The prince took a pillow and moaned into it as the strokes and rubs were too much for him to handle, the two brothers playing until they were both satisfied enough, and making sure they clean up and take care of shrinking Azzy back down to his at least believable regular size.