Robby excitedly jumped out of bed to the sound of his clock radio going off at 8:00 on a very special Saturday morning, filling his room with the sounds of Alice in Chains "Check my Brain". Throwing the blue comforter off his body and swiveling on his red mattress cover, placing his feet on his hardwood floor and excitedly running out of his room and down the hall. His dad Max was making them both pancakes with maple syrup, fruit and juice when the ecstatic, newly-minted teen rushed in just as the older canine turned around from putting the food on the table and gave him a huge hug, wrapping his arms around him and squeezing him tight and pushing him against it's edge. Max squeezed just as hard back. "Happy Birthday my young man, ooh, dad loves your so much." Max acknowledged through a slight grown of surprise at being squeezed so tight. "Thanks dad, I love you too". Placing the tip of his brown muzzle to his son's left ear, Max whispers, "I've got a special adult surprise for you to mark your transition Robby." A lustful glint appearing in his drown eyes as he gently squeezes his teen's left butt cheek, feeling the crinkle of his diaper and smiling a kinky smile. Dad and son then clapped each other on the back and after another squeeze, released each other and sat down for breakfast. "I thought we'd have something special Robby," Max said pointing to the spread, as his son turned and sat down, Max sat across from him as they started into their food. "This is really good dad, thanks". Robby compliments, shoving a forkful of glistening fluffy flapjacks into his muzzle. "I'm glad Robby", any plans for today?" Max queries. "Yeah, some friends and I are going to see Fast 9, the latest movie in the Fast and Furious franchise, then out for pizza". Robby excitedly answers. "That sounds great Robby." His dad responds proudly.  "Are you going to walk home after the pizza?" Max asks, finishing his pancakes. "I'm going to take my mini bike, I've got my key, no need to wait up." Robby answers, getting up as he pads barefoot across the tile floor, putting his plate in the sink, the white china rattling against the porcelain-coated cast iron. "Do you need me to change you?" Max asks to his son's pajama-covered back, accented by fake tire tracks, the diaper bulge clearly printing through the thin matching pants, emphasized by more tire tracks curving along the material as what's underneath it, dictates how it settles. 

"No thanks dad, I didn't have any accidents last night, so I'll just wear these until I get home tonight." Robby answers. Max goes back to his breakfast, smiling at the bike on his son's pajamas and thinking how much he loved and lusted his boy, slowly turning into a man... Walking through the opening from the kitchen, past the front door. padding across more hardwood, and right, up the set of stairs to his room. "Sounds good Robby, I'll leave the porch light on, when you come home, just turn it off when you come in and get me for your special present". In the privacy of his room, Robby removes his silver cotton pajamas, they're his favourite, with a picture of a Ducati Scrambler bike on the shirtfront with a red chassis and a mirror-like material on the tank, complimented by tire tracks all over it, like the half puppy/half adult was run over! Staring at himself in the full-length mirror attached to the closet at the foot of his bed, Robby admires his body, a little toned and fit from starting to lift weights with his dad and friends. 

He still has a thin enough waist to slide out of his No. 7 Pamper's diaper and steps out of it, admiring his naked body when he stands back up. Robby starts to gently stroke his circumcised penis that's grown thicker and longer, and slightly changed colour, as he thinks of his dad sucking him. Removing a board from the floor of his closet, Robby removes a canine dildo and lube from the secreted spot and bends over! He learned about the prostate during his introduction to sex ed and he focused on finding it, he finds it fairly quickly, a moan involuntarily escaping from his mouth as he's bent at ninety degrees with the back of his hand facing the mirror along with those four fingers and his thumb gripping the toy as he gently reciprocates it. Quietly moaning for his dad until he becomes fully aroused, hitting his prostate over and over like an old pro before he spirts watery prostatic fluid onto his floor which he cleans with his pajama shirt. Robby then cleans the dildo with the same shirt and hides it again. squirming back into his diaper, Robby puts on blue jeans, a FOX racing white T-shirt, and his Honda riding jacket, before grabbing his full face helmet and heading to the front door, after he's laced up his hiking boots from the front closet, he heads to the garage to his Enduro-style mini bike he built so he could ride anywhere. He loved nothing more then to go where the crow flies, he had the privilege to have been born with an amazing sense of direction. Opening the door from the inside, Robby wheels it out and the bike starts on first pull, the 250cc single cylinder engine he built has a smooth idle and thanks to a jet change on the single barrel carberater, he can cruise comfortably at 60 kp/h. With that, Robbie rides down the driveway, turning left, and sets out to enjoy his birthday and the day, that he feels will become extra special;)…

Hours pass and Robby returns home, satiated, satisfied, and basking in the afterglow of an amazing day, fantastic movie, company and food. Letting himself in after parking his bike, wheeling it back into the garage, Robby puts his helmet upside down on the small carved wooden table to the right of the front door as he walks in, opening the closet beside it to store his hiking boots before going upstairs...Robby, having a feeling based on what his dad whispered to him and the butt squeeze, he completely undresses in his bedroom, folding and hanging his clothes neatly. He leaves his diaper on, knowing his dad loves the sound and the general feeling of changing him, and to be honest...so did he, the vulnerability was erotic. 

Robby walks quietly to his dad's room, his sock feet on the hardwood noiselessly propelling him forward. His dad's door is ajar, so he opens it the rest of the way on silent hinges gently grasping the dimmer switch to his left with his index finger and thumb, slowly rotating it to gently increase the brightness of the overhead fan light and watching his dad stir and awake. "Hi dad, I'm ready for my special, adult, surprise, if you're ready to give it to me." Robby asks in a sultry whisper. Max squirms from side to side, propping himself on his pillow to look at his almost naked boy. "I've been waiting all night". Max responds flatly but with a feeling of lust. 

Max throws the covers off and swings his legs over, he stands up and removes his Fruit of the Loom boxers, they're the only thing he's wearing and they display his curves and package beautifully. He then sits back down on the edge of the bed and spreads his legs, his own cut 15 cm cock standing loud and proud! Robby walks over and gets on his knees as he's done countless times over the years, but every time always feels special, intimate, the first time. Opening his muzzle, Robby breathes in his dad's scent, deepthroating him! Max jumps at his son's cold noise on his abdomen, but Robby just closes his lips and starts to suckle and suck, bobbing his head. 

The teen always loved it when his dad would pet him as he gently pushed the back of his head into his loins...No words were said between the two, after a little while, Robby emitted a slight gagging and swallowing sound at his dad released his seed into his son's muzzle and he expertly swallowed it. Robby, pulling his head back and letting his dad's erection slide from it's embrace, is stroked again by Max's gentle right hand on the top of his head as his jaw is gently cupped in the left and lifted so their eyes meet. "It's time to change your diaper for the last time my son." Max whispers. They both stand and Robby moves to the bed, laying on it, on his back across it's width. 

Max grabs a bottle of his own lube from his night stand drawer beside his bed and greases his still-hard erection. He also pulls out a pair of white Joe Fresh boxers with red trim. "These are for you Robby, they're for you're transition into a man, but first, they're to keep you quiet". Max explains, smiling down at his son. With that, Robby opens his mouth and Max gently, lovingly, places  them inside as the boy closes. With Robby gagged, Max peels the tape up with his right thumb, pinching it between his index finger and peeling it back, hearing the descending sound as the tape breaks it's bonds and the rip as it reaches the end of the strip. He does that for the left as well. Spreading his son's legs between his thighs, Max grabs the center section and pulls the diaper away, placing it beside Robby. Max proceeds to kiss his son down his chest and stomach, eliciting a muffled moan as he kisses Robby's exposed, raw head. Robby shutters at the sensation, but groans as his breath catches as Max engulfs the shaft in his mouth and sucking and bobbing as his son moans louder before ejaculating, and his dad swallowing. Max kisses Robby's smooth, almost hairless testicles for the last time before continuing. 

Max holds the underwear as Robby tenderly opens his mouth and Max slowly removes it, both stare passionately with big grins before Max kisses him lustfully on the lips before taking his left paw and helping him to his feet. Casually tossing the underwear aside. Both males then walk into the bathroom directly opposite the king-sized bed. Max flicks on the light directly to his right and slides open the shower door to his left, turning on the water and letting it get warm, both step in and wash each other taking the opportunity to finger each other under their bushy tails! 

Max then soaps up his erection and bends his son forward by his slim waist as Robby braces himself with flat palms against the textured tile wall. Max grabs the base of Robby's tail in his left fist and pulls it up. "You naughty boy!" he says mischievously leaning in over Robby's back and whispering huskily into his left ear. "I'm going to give my boy a proper breaking in to try out his new equipment." Max said as he pushed in-not forcefully as to cause pain, but with authority and a definitive decision. 

Max couldn't remember the last time he thrusted that hard! Breeding Robby as he whined and moaned like a needy bitch, as the hot water pelted and the steam rose, Max reached around with his right fist and furiously jacks his son! Robby continues to whine, whimper, and moan with need and hormones, Max, not letting his knot grow too big as to facilitate forcing it through his son's tailhole, stretching it! Father and son eventually erupt in two simultaneous orgasms! Father embracing son, they pant and relax in their afterglow, dad wrapped around son. 

Max turns the water off and they dry off, each with their own towel. Both males walk back into the master bedroom and Max finds Robby's discarded diaper on the floor beside the bed, siting open on it's front, he picks it up, places it on the bed, and masturbates into it before taping it up and throwing it into the diaper pale. Max hands Robby his underwear and Robby puts it on, while Max strokes the profile of his boy's package through the material. Both males proceed to climb into the master bed together and sleep soundly late into Sunday morning wrapped warmly and contently in each other's arms.