Bowser Jr. laid awake in bed, staring up at the ceiling. The young koopa couldn't sleep a wink. It had become almost routine as of late, that he had to pleasure himself at least once a day before he could relax. It was like this ever since he had become intimate with his dad. His covers were tented from his 6 and a half inch tapered boyhood ached for attention. He didn't really want to rub one out though. It was already after midnight and he knew it was only a matter of time until his erection slowly went away.

"Come on, go down already," he grumbled, flinging the covers off of himself. "Why do you always have to do this at the worst time?" Despite not wanting to admit it, Junior knew he needed more than just a few strokes to satisfy his lustful desires. He needed his daddy. 
"Ugh, FINE!" The young koopa jumped out of bed, and snagged a bathrobe to hide his obvious erection. Opening his bedroom door he poked out his head and looked up and down the hallway. The coast was clear. Junior didn't want to be seen heading into Bowser's room by any of the guards. For both he and the rest of the castle's koopas, his room was normally off limits. However, Bowser did say that he was invited to enjoy his company after their first time. It was supposed to be before bed, much earlier in the night, though. 

Meanwhile, Bowser laid on his back and sighed. 
"I guess he just doesn't want to play with his old man after all." The koopa king had been disappointed night after night, as he expected his son to come rushing to his room since their first time together. Yet it has been nearly a week and Junior hadn't said a word to him about wanting it again. Just as the frustrated koopa reached for his slit, a knock of the door echoed through his room. Quickly he jumped out of bed and ran over opening it up. To his surprise, his son stood before him, a robe loosely hanging on his shell-less body. 
"Oh, h…hey son," Bowser said, trying not to sound eager. "What's up?"

"Sorry, I know it's late but…can I…stay with you tonight." 

"S…sure. Come on in." Bowser opened the door wider and Junior stepped inside. The older koopa's heart pounded heavily as he closed the iron door behind him and locked it up tight. Bowser could tell just by the way his son was walking, that he was hiding his arousal. Licking his lips, Bowser reached down and scooped Junior up in his arms. 

"Wha?" Junior yelped, as he became cradled by his father.

"Can I assume you came to play with your old man before bed?"

Junior closed his eyes and sighed. "Was it that obvious?" Loosening the belt on his robe, Junior let it drape away from his body, revealing his tense boyhood. "I…I just can't sleep. Not with it like this."

Bowser licked his lips again and smiled. "Don't worry son," Bowser replied, walking to his bed and easing the young koopa onto the mattress. "Daddy will take care of it for you."

Not wasting any time Bowser dropped his muzzle onto Junior's shaft. The young koopa gasped with delight, feeling his dad's tongue wrap around his sensitive boyhood. This was the sensation he had been missing all those sleepless nights! The older koopa bobbed his head up and down, coating the young koopa with his saliva. Bowser had only one thought on his mind…preparation. The older koopa wanted to take his son's virginity by letting him penetrate his experienced tailhole. Though he was already producing ample precum, Bowser wanted to be sure he gave his son what he came for first.

The act of blowing his son quickly caused the older koopa to become erect. His monstrous 18 inch cock pushed out of his slit and began leaking all over the floor. Using his left hand, he caught some of his precum and slathered it on his tailhole. It had been ages since he was penetrated, but he always did love the feeling of it. Normally the koopa king did his best to assert dominance over his sexual partners, but he was more than aware that he was far too big for his son to handle right away. Plus this would give him a great opportunity to teach his son how to be a better king. 

Once he was sure his tailhole and son were both properly lubricated, he pulled back his head and bent over in front of Junior. The younger koopa had closed his eyes as he was being sucked, but opened them when Bowser pulled away. No longer feeling the warmth of his father's tongue, he looked up in confused silence. 
"D…dad!?" Junior gasped, seeing his father presenting his tailhole to him.

"Climb on son," Bowser said, spreading his cheeks apart with both hands.
Junior nearly fainted. His dad was asking him to penetrate his tailhole. Something that despite his inexperience, he knew would be much better than a blowjob. He looked down between Bowser's legs, to see his long cock flexing with anticipation. That was all the motivation he needed, and the young koopa leapt from the bed and clung to his father's backside. Aligning his boyhood with Bowser's puckering entrance, he was mesmerized by what was happening. 

"Is…is this really ok, Dad?" The young koopa stuttered. He was extremely excited, but also very nervous. Everything was happening so fast. 

"Yup, go ahead and breed me son,"Bowser nodded reassuring him. "Don't hold back." 

"O…ok…here goes nothing. " Junior thrusted his hips forward and his wet cock slipped inside Bowser's body. Immediately the younger koopa gasped, feeling what it was like inside a tailhole for the first time. Bowser's insides parted for a moment, then squeezed around Junior tightly. 
"Holy power blocks!" Junior moaned, "This is amazing," 

"Mmmmm, glad you like it son," Bowser replied, feeling Junior's cock flex against his prostate. The older koopa forgot how great it felt to be pleasured from the inside. His royal cock twitched, shooting a long stream of precum onto the floor. The younger koopa's length was the perfect size to give his father's prostate a rub without pushing on it too hard. 
"Keep pumping in and out," Bowser instructed. 

Doing as he was told, Junior began forcing his boyhood in and out of Bowser. The immediate rise in pleasure caused the koopa's face to light up. Quickly realizing the faster and harder he slammed his hips, the better it felt. He was right, it felt WAY better than a blowjob. Grinding his body harder now, Junior became lost in the pleasure of breeding another koopa for the first time. 

SLAP SLAP SLAP

The sound of their scales clapping together echoed through the room. Bowser began moaning audibly, joining his son's already heavy grunts. With each thrust Junior made inside him, sparks of pleasure shot through his loins. The great king began wondering what it would be like to have his son pound his tailhole more often. Just as his mind began to wander, Junior let out a short gasp.

"D…dad, I'm cumming!" 

Bowser clenched his teeth and fists. Closing his eyes he reassured his son once more. 
"Yeah boy! Cream your daddy's hole!" 

"AAAAANNNGGHHH!" Junior grunted and hugged Bowser's body tight. The young koopa's boyhood pulsed wildly, blasting his hot cum into his father's tailhole. Bowser clenched down on Junior's base, milking out every drop of his seed. The younger koopa could feel the cum being sucked out of his body by Bowser's tailhole, and it felt incredible. His body shivered as his pubescent cock unloaded all of his pent up lust. When the last of Junior's boy-cum had been absorbed by the older koopa's body, Bowser finally relaxed his tailhole and let him pull out. 

SHLOOOP

Junior's wet, semi-hard cock flopped out leaving a long string of his cum falling to the floor. He panted heavily catching his breath as he slowly slumped off of Bowser's back.

"Ah, yeah. Great job." Bowser mumbled, his young son's cum warming his inner tailhole. He turned over and laid back on the floor. His still hard cock slapping against his chest. "Looks like you really needed that."

Junior fell onto the floor, more tired now. Forcing himself to sit up, he supported himself with one hand on either side, but kept his eyes closed.
"Oh man, that was soooooooo, gooooood. I…you gotta let me do that again sometime."

Bowser smiled and began slowly stroking his 18 inches with one hand. He still hadn't cum, but was happy to see his son had. He rubbed up and down the entire length while he admired how his son had grown into such a sexy young koopa. Junior's plump curves matched his own, and that healthy boyhood continued to arouse him even further. Small grunts escaped his muzzle, as he waited for the boy to open his eyes.
"You can cum in me whenever you want to, son. A growing boy like you deserves it."

SHLICK SHLICK SHLICK SHLICK 

The sound of Bowser's strokes finally got Junior's attention. The young koopa opened his eyes and saw Bowser's monstrous cock, just inches from his face. The musky smell of his precum was intoxicating, and caused him to instantly become hard again. Lurching forward he raised both hands and grabbed Bowser's lower shaft. 
"Wow, you're really wet!" Junior gasped, his hands quickly becoming drenched by his father's precum.

Letting go of himself, Bowser leaned back and let Junior once again explore his giant cock. His little claws felt good as they rubbed and scratched up and down his length. 
"That's it boy, just keep rubbing it like that."
Junior giggled and increased his speed. The friction caused Bowser's cock to shoot a few streams of precum into the air, which painted Junior's head and arms. 
"Arg, yeah!" Bowser was becoming more vocal now, giving Junior a bit more confidence. The younger koopa could now smell the strong and sweet musk of his father's precum even more. Seeing how much Bowser enjoyed sucking on his boyhood, Junior decided to try a little of the older koopa's juices for himself. Opening his mouth, he slowly licked his tongue up the entire length from slit to tip. 
"W…whoa!" Bowser gasped, not expecting the his horny offspring to try oral so soon into his sexual experience. He wasn’t sure what to say, but wanted to be sure his musk wasn't too intense for the boy. "H…how do I taste?"

Junior stopped stroking to ponder the flavor. He rolled the precum around his mouth for a few seconds before swallowing it. 
"Mmaaah! Slimy…warm…it kinda tastes like it smells. I think…" Junior then took another long lick, filling his mouth with it again. "...I kinda like it? Does mine taste like this, Dad?"

Bowser leaned forward and kissed Junior's snout. "Yours is much sweeter."

Junior smiled then returned his tongue to Bowser's cock, began lapping at his tip while slowly rubbing either side of it. Bowser threw back his head and let out a long moan. He felt so proud of Junior at that moment. He knew from that moment on, the two of them were going to share pleasure each other’s bodies as much as possible. Both were equally addicted to the other’s cocks, and their love only grew stronger with each passing moment. After a few minutes of licking, Junior turned his head to the side and began sucking. He knew he'd never be able to drop his muzzle on the whole thing, but he could certainly use his mouth like a third hand, to rub up and down Bowser's length. 

SLUUUURP
Junior sucked up Bowser's precum as fast as it fell down to where he was. Slowly he moved up closer to the tip, continuing to rub both hands firmly. The older koopa was just about at his breaking point when his son's tongue grazed across his tip. He bent his knees and grunted, doing his best not to cum without warning. Junior had only played with him once before, but he was already so good at pleasing just the right spots. 

"Argh! I'm gonna cum!" Bowser shouted, involuntarily thrusting his hips up, forcing the tip of his cock into Junior's mouth. 

"Hmph!" Junior mumbled as his father's thick tip quickly stretched his jaw. 

Just as Junior managed to pull Bowser out of his mouth, the koopa king erupted into the air. His 18 inches flexed, squirting a massive and healthy stream high above them both. Junior continued pumping his hands, forcing the monster cock to wiggle back and forth, drenching the two of them in the mature koopa's hot cum. Junior laughed, as he milked out the last of his father's seed. Eventually it had coated them so much that it began pooling around them on the floor. 

A final pulse and Bowser fell back, limbs splayed out on the cum covered marble. Junior licked some of it up, drinking in the ecstasy of having made his dad feel so good. Crawling up onto his daddy's cum soaked chest, Junior stared at the exhausted king with heavy eyes. 
"I love you, Dad." Junior said, making circles with his claws in the cum. 

Bowser snorted and opened his eyes. He tilted his head up and smiled. Placing one hand over Junior's back he squeezed him tight, squishing his cum against their scales. 
"I love you too, son. Thanks for making your old man feel like that. You're the best."

Junior giggled and kissed Bowser's snout. "Same time tomorrow, then?"

"Same time everyday!" Bowser replied, "My sexy little koopa."