It's been a few months ever since I taught my boy how to take his father's dick up his ass. Ever since then, he's been insaitable - wanting to have sex with me at every possible moment. Can't say I'm surprised though, the boy is turning into his early teens so you can imagine how the testosterone starts to kick up. Sometimes, he likes to role-play all "innocent sweet boy" with me since he knows it gets me hard. I won't lie, that's always been an attractive factor towards him - along with his cute face - but he's lost his innocence already. He's turned into a complete hornball for his father. I've been enjoying the attention though, and plus it does give us time to bond.
I idly stroked my penis out of it's sheath as I lay on the side of my king sized bed. There used to be two here. Shame I realised I like men too late. Speaking of which, my brother is gay also. My dick slid out of it's musky sheath as I thought about the notion of getting my brother to fuck my son. Does he even like cubs? He probably thinks I'm just a cruel paedophile. Oh well, not like I care anyway. He is all mine, after all...
I heard shy knocking at my door. Groggily, I replied "What is it, son?" It had to be him, my son. "I-I had a bad dream..." I chuckled to myself, under my breath. He's roleplaying again, it seems. Bloody kid.
"Come in then..." my door swung open to reveal my blushing son, fully naked. His cock was hanging limply over his balls. I noticed that when he creeped over to me, his cock bounced up and down with more emphasis. I sat there, looking him over. I felt rather abashed; my son's sheath is no longer as small as it once was, I had only just noticed it's grown to a size near my own. Nowhere near as downy and musky as mine though. We are growers, not showers in the family - and I'm glad that tradition continuted. 
"Can I get into bed with you, daddy?" I nodded, holding the quilt up for him so he could shuffle into my body. I noticed that he was getting considerably warmer as he snuggled close to me, his head over my armpit as I embraced him. I noticed I was getting warmer too. 
Gasping slightly, my son asked "D-Daddy, what's that thing down there...?" He pointed to my rock hard thick doggy cock, protruding from my sheath.
I thrust my musky crotch in his face, my son lapping up my manly sheath like a told him to. "Yeah, boy... that's right, treat your daddy right." I sighed as he sucked on the tip of my cock as instructed and I was rather impatient, forcing his face into my armpits. "Fuck, boy... worship your daddy...." he was violently sucking his lips on my sweat sodden pits and hair, as I grabbed his ass and shoved my thick fuckstick in him.
"Ughhh... daddy that's hurts!" 
"I know son, I'll make a man out of you."
I felt his anal walls contracting and sucking and molding on my cock. I thrust forwards and backwards into my son's gaping hole, stretched to accommodate my girth. "Drop the act, son. You know you've been slutting it up for your father." He blushed, face turning away from me in shame "I'm sorry, I just can't resist you." "Heheh, me neither champ. I do gotta commend you though... I loved waking up to your mouth around my cock."
He looked up shyly at me, "Yeah? You were throbbing and moaning in your sleep."
"Really? Guess I couldn't wait to have a piece of this!" I slapped his ass devilishly, stopping my thrusts with my cock lodged in my son as we talked to each other. 
"You're getting pretty horny though, and I can't always be around to give you what you need. How about I buy you a fleshlight?"
Alex looked quizzically at me, "I've heard of those, would I enjoy fucking it though?"
I patted him on the shoulder, "Yeah, you've yet to top - haven't you? Well, that will be a new experience for you." He nodded, gesturing to the bulge in his stomach - where my dick clearly lied. "Hmm... wow the sight of that has got me leaking precum, Alex." I licked my lips, smiling up at my son as he looked on at me lovingly.
"Come on Daddy, edge me out..."
I thrust forwards into my son, making him moan and shiver around my bulging cock lodged inside him. Slowly, he pulled back - deliberately taking his time as I saw my shaft slide out of his cleft, his ass still squeezing around it. "Fuuuuck, son," I moaned out. The night was filled with our heated grunts and the sound of my dick squishing into his ass always turned me on. It's one hell of a tight fit. My thrusts were no longer shallow, but full force - knot and all. Initially, my son cried from the pleasure - but he soon enjoyed it.
He was a quick learner. He knows he can trust me. "Dad... You're throbbing so much, how come you haven't cum yet?" I chuckled, hilting my boy with my knot once again, but not fully ledging it in - eliciting a slutty moan from the boy as he trembled from pleasure. "It's because I like to edge, son. From the way that you're clenching around my cock so far, I can tell that you're about to-" Alex suddenly let out a moan of bliss as his cock convulsed, painting my hairy chest with his cum. "Ooooh~" Alex started to enjoy the afterglow of his orgasm I kept thrusting into him - with more abandon this time. I'm getting close too. "Dad, you look so good with my cum on you..." He smirked at me in bliss, enjoying the sight of cumming all over my father's face and upper chest. "Yeah? Well, I like my cum up your ass. That's where it belongs."
I let out a roar, fully knotting my kid as my huge doggy cock convulsed and belched endless wads up cum straight up into my son. "Yeah! Mmm I love it when you're stuffed full of my seed." Cum was still being extracted from my cock with each clench of my son's ass - making me thrust madly into him as cum painted his insides. I saw how multiple, thin streaks of cum leaked from his ass - even though I was fully plugged in his ass, this just goes to show how full the boy is. It's all good though, it helps him grow. 
We both released sighs of content, my son's cum on me and his father's cum in him. 
"Jeez, Dad... What made you cum so much?" I chuckled, ruffling his head, "That's what edging does, son."
I looked it at him curiously, "Although, you did make a curious remark regarding your cum painting me... for yourself, you cum a lot for an early teen."
He blushed at me, "O-Oh really? Guess I've also got a top side in me. I'll see how the fleshlight goes. Thanks Dad, but it doesn't hold up a candle to how thick and virile your cum is." He rubbed, "Hmm, it feels so good in my tummy!" 
I let my now deflating cock stay in my son, the both of us huddling together in my spacious bed.
"I do want to visit your uncle soon, though. How about that, sport?"
"Hehe, sure! But... wouldn't that leave us no time to do our 'bonding sessions?" he asked.
I chuckled, looking up to the ceiling, "We'll see if we can sort that out..." I smirked to myself, imagining the gorgeous fuckpile we'd have if my brother turns out to be into the idea.
If not... Well I could also fuck my son right in front of him, and see what type of reaction that turns out to be.

