ALL CHARACTERS ARE 18+ IN THIS STORY It was a day like any other. The two twins, Tuck and Ella, were sitting in the little apartment that they called home. Not much had happened to them recently. They wanted to help Ryder out, but he never called. They were beginning to understand why Wild had gone off and formed a team of cats to do his own thing with. The sheer BOREDOM that they were going through was mind numbing! What was worse was that the two of them were going through heat. Normally, they’d just screw around with their pillows or whatever else was available, but this time it wasn’t doing the trick. Ella groaned as she squirmed, sliding her rear across the floor in an attempt to satiate her hormones. Her and her brother had agreed that they wouldn't directly use each other to appease their urges, but they’d help out if necessary. “Ugh! I hate this time of year. All our old tricks to get relief aren’t working!” Ella yelled out in frustration. Tuck grunted as he thrusted into a pillow, equally unappeased with his current situation. He too was stuck in his mating cycle and nothing was getting his arousal levels down. “I think we need to see a specialist for this.” Tuck mumbled. “I agree! Let’s stop yapping and go!” Ella exclaimed, bolting out of their little home like a banshee from hell. The two of them hopped on their motorcycles and sped off to Adventure Bay. Within a half hour, they were at Katie’s pet parlor that also doubled as a veterinary clinic. “Katie!” Tuck shouted as he and his sister ran through the sliding glass doors of the entrance. Katie turned to them, initially waving and smiling. “Hi Tuck! Hi Ella!” Katie greeted them. Then her smile faded as she saw the two of them prancing in place, their eyes filled with pure need and desire. “In heat?” Katie assumed. The twins nodded their heads in confirmation. “Real bad.” Ella whimpered. “Bad beyond belief.” Tuck added. Katie nodded as she brought out some pill bottles and a package of canine diapers. “The pills are for birth control. The padding is protection if you don’t want to get knocked up.” Katie explained. Ella arched an eyebrow skeptically. “Who am I supposed to be getting fucked by?” Ella snorted. The veterinarian turned her head and looked out the window at the Lookout Tower. Ella’s eyes widened as she realized what was being suggested. “No! I can’t do that!” The female golden retriever yelped. “What my sister is trying to say is that we don’t know the pups well enough to ask such an intimate favor of them.” Tuck interjected on behalf of his twin. Katie scratched her head. “I don’t know who else you could ask for help.” She admitted. Tuck took the pills and diapers, going and putting them away in the back of their buggy that formed whenever their motorcycles merged together. “Thanks for the help, we’ll figure something out.” Tuck told the veterinarian. “I’m too shy to do that with them…” Ella sheepishly said as she hopped in the car as she and Tuck drove off. At their apartment, the dynamic duo set their stuff down on the small table they had. Ella snarled and growled as she danced in place. “Sis? What's wrong?” Tuck asked. “EVERYTHING, Tuck! I’m horny as hell, there’s no relief in sight, my hormones make it hard for me to sit on the toilet and relieve myself, and I feel like my bladder and bowels are gonna explode!” Ella whimpered. Tuck then had a thought, racing over and unfolding one of the diapers that Katie had given them. “Lie down and let me put this on you!” Tuck offered. “A diaper?! Are you kidding me, Tuck?! I’m not a little pup anymore!” Ella yelled. “You’re having trouble going on the pot, so this should help!” Tuck argued. Ella was too desperate to say no. However, she wasn't just going to let her brother demean her like this. “On one condition. I’ll tell you about it after this is through.” Ella relented. “All right.” Tuck replied as he taped the diaper around her waist. The girl stood up, getting on her four paws and wiggling her rear end. She chuckled as she heard her new underwear crinkle quite loudly. Her belly let out a loud gurgle and she groaned. Out of her slit poured a torrent of urine, the yellowish green liquid spewing from her urethra and splashing against the plastic white exterior of her padding. “Ahh…” Ella sighed as she wet herself. Tuck could only stare in amazement at his sister as she proceeded to flood the freshly donned diaper with her pee. He had never seen his sister piss so much… and he blushed in embarrassment as he felt himself stiffen in his crotch. This detail did not escape Ella. “T-TUCK, ARE YOU GETTING AROUSED BY ME USING THIS THING?!” Ella gasped. Tuck blushed and tucked his tail between his legs in embarrassment. “I… I… I…” The male golden retriever stammered as he tried to formulate a response. Ella started to giggle and laugh as she turned around, shaking her soaked, soggy seat in a playful yet somewhat seductive manner. “Bro likes diapers, bro likes diapers!” The girl teased. “S-stop it.” Tuck murmured. “Lie down. Time for you to do that thing we agreed on.” Ella commanded. Her forceful tone made Tuck freeze up and roll over before lying on the floor. His sister then proceeded to plop her diapered derrière on his muzzle, causing him to make a muffled cry of surprise. Ella’s stomach roared once more and her bowels felt like they were on fire. So as she started to tape up Tuck’s padding, she began unloading her bowels into her new undies. Pounds and pounds of poop poured out of her rear and plopped right into the seat of her plastic pants. The puffy pampers ballooned out until they sagged down very low, staining brown with her massive mess. “ELLA!” Tuck howled in protest as the load swelled in size, the smelly mass of shit inching closer and closer to his face until it was pressing up against his nose. God, the stink was tremendous! But there was something about the stench that he was enjoying. He could feel his dick rise to full mast as his sister finished wrapping his diaper on him. She lifted her rear off of him and walked away. “Did you like it?” Ella chuckled. Tuck could only nod. He had peed earlier so he didn’t need to urinate right now, but he did need to take a dump. “I think I gotta…” Tuck started to say. “Potty?” Ella guessed. The boy retriever nodded his head and blushed softly. “Yeah, I gotta poop. Do you think you’d want to watch?” Tuck asked his sister. Ella grinned at him in response. “Only fair that I return the favor, since I kinda shat on your face.” Ella cheekily replied. A loud BLARTCH echoed through the room as he started to relentlessly mess himself. With each push, more and more solid logs erupted from his rectum and filled his padding. His butt hurt as he kept on defecating into his diaper, sloppy wet slush shooting out of his hole now and drizzling the dung dump he had already made with dirty liquids. The boy retriever let out a soft moan as he finally finished his massive dump. Ella poked his pile of poop, whistling in approval as she examined the mound of mess he had just produced. The twins circled around, looking at each other’s filled pampers. “They’re so big…” Ella murmured. “Right back at ya, sis.” Tuck chuckled. “I wonder what it’s like if you press it against yourself, with some sort of surface?” The boy then wondered. Ella smiled as a lightbulb went off on her head. “Let’s kiss our butts together and squish them against one another!” Ella exclaimed. Tuck nodded and they slowly backed into the other’s behind, their diapers pressing against their sibling’s and spreading the dirty contents contained within all over every inch of their plastic undergarments… SQUISH! SMUSH! SQUELCH!! …That is, until their seats could bear no more. Their messes started to seep out of the leak guards and waistbands, covering their legs and tails with their messes. At this point the two could no longer hold back, and embraced each other in a sibling way while still horny, grinding their dirty diapers and crap coated crotches against each other until they finally came. White sticky seed spewed like volcano geysers into their diapered fronts, staining their heavily brown plastic pants a lighter shade of brown. The two sat in bliss, basking in the post orgasm glow for a few minutes before the stink hit their nostrils. Looking down at their behinds, they saw they were filthy. “Man, we’re really messy!” Ella commented. “Let’s go get cleaned up.” Tuck suggested. Ella nodded her head as she peeled the pooped pamper off of her body, tearing the tapes off and letting her destroyed diaper plop to the floor. Tuck followed suit, wincing as his front paws got all dirty with dung as well. Balling up the soiled garments, Tuck threw them in the trash can before he and his sister went off to get a nice bath.