“Keep your core tight, hinge at the waist but don’t lean forward.”

Split squats were Freddie’s favourite exercise. He loved training legs, or more specifically, his glutes, and it was really starting to show; his ass was huge!

After ten good reps, he re-racked the dumbbells and did a half turn to admire himself in the mirror. His scrunch-butt leggings looked painted on. 

I felt a golden glow of love spread through my heart. Since turning 18, he’d blossomed into a beautiful boy who’d grown in confidence and was starting to give me little clues about his rapidly developing sexuality. Styling his hair, changing how he walked and talked, and choosing clothes to flaunt his new physique. He was such a little flirt!

“What do you think, Dad? Am I gaining size?”

“If this gets any bigger, those pants are going to split!” I spanked his juicy bum.

"Oi!" he playfully punched my shoulder. “You can’t talk, look at you, you’re massive.”

I flexed my muscles in front of the mirror. He was right; I was getting big, especially my arms. Freddie stroked my bicep. “Wow.”

"Ok, young man, enough mutual flattery, let’s hit the showers. We haven’t got all day.”

It was a quiet weekday morning, and we had the lockers to ourselves. The furthest cubicle was our favourite. It was larger than the others, big enough for two.

We’d always been a very open family when it came to sex and nudity, and we’d brought Freddie up that way. The first time I suggested that we share a shower, he’d been a little taken aback, but now it was quite normal. 

He smiled when I joined him, his eyes dropped down to admire my dick, and he flashed the cheeky smile that drove me fucking wild.

As he turned away from me, his plump bottom brushed the thick jungle of my pubic bush. I knew him well enough by now to know it was no accident, and as I smoothed soap out over his broad shoulders, I let my thick meat nestle against his crack.  

He sighed with pleasure and moved a millimetre back against me. “Oh Daddy, that feels so good.”

I moved my hands round to his front, brushing his nipples, feeling the size of his pecs.

“Your tits, boy! You’re really stacked.”

“Dad!” his tone was meant to sound like a protest, but I knew he really loved it.

“And you’re so smooth.” 

“Yeah, well, I had a full-body wax on Monday. What do you think? Do you notice the difference between this and being shaven?”

“I do,” and I did, and I thought to myself, Yet another sign that he’s a bottom boy.

I slowly let my soapy hands roam over his entire torso; every inch of skin was as soft and smooth as silk.

“It’s incredible, Freddie. Did she wax you everywhere?”

“It was a 'he’, Dad, and yes, everywhere, and I mean everywhere.”

I traced a finger down the tight crack between his buttocks. “Even here?” I pushed my finger between his cheeks and felt his little hole, perfectly smooth and hairless. “Oh my goodness, yes, that’s amazing.”

“You like it?”

“I love it. I’m going to pay for you to be waxed every month.”

"Oh, Daddy, thank you, that’s so kind." He turned to face me, never more lovely than when completely nude, brazen but somehow still quite innocent.

I saw that he was fully erect, his small, smooth shaft crowned by a perfect purple bell. He saw me looking and followed my eyes down to proudly admire his cock.

“Why do I always get a hard-on in the shower after our workout?” his tone was playful, teasing. 

“It’s the hormones, Freddie, all that testosterone pumping round to make you big and strong. Just the way I like you." I pulled him into my arms. He let out a little yelp as he yielded to my touch, and I kissed him on the lips. 

*****

That evening after dinner we all chilled in front of Netflix. Soon enough his mother started yawning, and she toddled off to bed. 

Freddie joined me on the sofa, his head resting on my lap. I was nude beneath my thin lounge pants, and I could feel his cheek against my root and the stirrings of arousal.

We were silent for a little while before he broke the ice.

“Daddy, I love you.”

“Awwww, I love you too, pretty boy." I ruffled his thick blonde locks.

“No, I mean I love you. I’m in love with you.”

I felt the blood surging into my cock, making it rise up and press against his face.

He lifted his head, revealing my tented trousers, and looked into my eyes.

“I’ve wanted to do this for the longest time,” he took hold of the waistband and began to lift it up.

“Freddie.”

“Shhhh.”

He freed my cock, which sprang out and slapped against my belly with a meaty thwack.

“Freddie.”

“Oh my goodness, Daddy, you’re so big.” He wrapped his little hand around my shaft and pulled it down to vertical, drawing back the sheath of skin to unveil my swollen helmet. “So hot.”

“Fre…,” my feeble protest only got as far as that before his head bobbed down and engulfed me in his greedy lips. “Oh fuck.” 

His mouth swirled around my throbbing glans, tongue lapping at my frenulum as his hand massaged my column which was coated with his drool.

I’d lost my moral compass. I grabbed his ears and impaled his throat on all eight inches, making him quack and choke, his hands gripping my thighs as I fucked his windpipe with no mercy.

Just as my toes were tingling at the first rumblings of what would have become a volcanic eruption, he broke free, my cock popping out of his mouth like a lollipop.

His eyes were wide and his chin was wet with spit. He held my gaze and licked his lips.

“Mummy’s got her spin class in the morning, Daddy. We’ll be all alone together,” and with that, he upped and left, half turning to give a cheeky wink as he shut the door behind him. 

I gently stroked my aching cock, marvelling at the way the pulsing veins stood out along its length. The urge to cum was powerful, but something told me to save my seed.

Save it for tomorrow…

******

Her class was at eleven, and we breakfasted together. I could hear Freddie upstairs in the shower.

I watched her car disappear around the corner.

My penis was getting longer and thicker, filling with blood, my brain filling with forbidden lust. It took all my resolve to wait five more minutes to make sure she hadn’t forgotten her phone or something before I slowly started to walk upstairs.

He heard me coming.

“I’m waiting for you, Daddy. In my bedroom.”

I pulled off my t-shirt and pyjama bottoms as I reached the top of the stairs, my erection bouncing wildly from one hip to the other. 

With one hand on the doorknob, I paused for half a second. A last moment of reflection before I crossed the literal and metaphorical threshold. 

The sight that greeted me banished all doubts. He was standing up, bent at the waist, with his elbows on his dressing table, buck naked apart from a pair of his mother’s high-heeled shoes.

His legs were spread apart, and the cleft between the twin orbs of his golden buttocks glistened in a way that took my breath away.

“Oh Freddie,” I whispered in a tone of reverence.

"Daddy, I want you to be the one. To be my very first.”

"Oh, babyboy.” 

Yes. That simple, single word completely filled my mind.

I knelt down behind him. He didn’t seem surprised but instead spread his legs a little wider.

As I put my hands upon those perfect glutes, three of my senses were almost overloaded: the touch of his silken teenage skin, the scent of his freshly cleansed behind, and the sight of his love hole, so pretty, so pink, nestled deep between his butt cheeks.

I closed my eyes to better appreciate another sense: the taste of him as I pulled his cheeks apart and started on my special meal.

Round and round my tongue traced the circle of his opening, feeling the ridges of the skin that surrounded it and gently pushing into him in preparation for our congress.

I could have stayed like that for hours, feasting on his juicy peach, but Freddie was impatient.

“Daddy, I’m ready for you. Make love to me.”

The words sent a jolt right through me from my head down to my toes, and my cock jerked violently in a desperate bid to get even bigger and harder.

I got to my feet. My penis was so full and swollen that it almost felt like pain; the skin retracted to expose my giant bulb, already glistening with precum, primed and loaded both with pressure and with volume. He’d put the lube there on the table, and I smoothed a generous dollop onto my shaft and then raised the bottle and drizzled it into his crack.

"Oh!" he gasped at the feeling of the viscous liquid seeping into his bum and at the realisation that I was about to make his dreams come true and fuck his virgin ass.

I took one plump cheek in each hand and pulled them gently apart to reveal the glory of his teenage anus, smoother and more perfect than any girl’s could ever be, soaking wet with spit and lube and so ready to be fucked.

I touched my tip against his ring, and it opened up—dilated—receptive and inviting.

He braced his elbows on the table, and his hips rotated upward, giving me the perfect angle to penetrate his hole.

He’d been right; he was ready, so ready, and as I pushed against him, into him, making his pussy lips stretch around me, he cried out in astonishment. I knew that we were past the point of no return. Today, we would be lovers, and everything would change. 

I pushed in an inch, breaching his defensive reflexes. His body tensed, his head snapped back, and out of his mouth came an eerie wail, not loud but at the highest pitch audible to man. As I listened to this wild noise subside, I was aware of my penis throbbing and pulsing in a way that it had never done before. I seemed to have gained an inch of length and girth, and my balls, full to overflowing, were swollen and tight up against the root of it, primed and loaded to fill him with their copious cargo, when the time was right.

I gave him twenty seconds to acclimatise, and then I warned him to prepare himself.

"Freddie, I’m going to fill you now. I’m going to give you every inch of my big, hard cock. Don’t fight it; close your eyes, open that pretty cunt, and let your Daddy fuck you.”

He moaned softly and turned to look over his shoulder. His eyes were radiant, and he wore a blissful smile.

“Yes, Daddy, do it to me. Fuck my virgin bottom, and please flood me with your seed.”

I gripped his buttocks tightly, and after mouthing the words ‘I love you’ to him, I slammed my eight-inch column balls deep into his guts.

His eyes rolled back in their sockets, and his mouth fell open in a silent scream. Had I not gripped him so tightly, he would have crumpled to the floor as rapture overwhelmed him.

Again, I paused for twenty seconds while his shock and pain subsided.

Then I withdrew a quarter inch and rammed it back inside him, then back half an inch, balls deep again, and carried on like that, each time withdrawing a little more before driving it all back into him until, at last, I felt the flared ridge of my bellend come tight against the inside of his anal canal, and from there I built a steady rhythm of full, long, powerful strokes. 

I was fucking him, of that there could be no doubt, and his breath now came in ragged gasps, hands clawing at the table as he learnt the lesson all bottom bitches need to learn: absolute submission.

When he’d gone completely limp and mute, slumped forward on the table, I knew that I had conquered him. He’d abandoned all resistance and given me his hole. As well as the passion of my love for him, I felt the thrill of victory; I had claimed my son’s virginity and now owned his ass forever. 

He was taking such a pounding but would reap a rich reward. Now was the time to bring him to the pinnacle of human ecstasy: the male anal orgasm. 

I moved my hips a little lower and pulled his torso up to 45 degrees. At this angle, my helmet scored a bullseye on his P-spot at the beginning of each stroke, and then the underside of my cock brushed all along it as I filled him and then again as I withdrew. Constant stimulation to that most secret pleasure point. 

The effect on him was instant; his head came back again, and he let out a deep, guttural 'oooohhhfff,' then another, and then they became clear cries of pleasure timed to the cadence of my thrusts.

The oblivion of ecstasy seemed to put me in a trance. I was only vaguely aware of the world outside the bedroom—perhaps a car door slamming or some footsteps on a pavement—but the wet sounds of our lovemaking and the heaven of its feeling were all that I could think of. 

My beautiful boy was relishing being fucked, pushing back onto me now, greedy for all of my cock, those smooth cheeks bouncing off my rock-hard belly at the bottom of each stroke. 

He was a superb bottom; of course he was. I’d always known he would be.

I reached around and took his stone-hard penis in my hand and felt his body jolting as I stroked his little dick.

"Oh, Daddy, oh, fuck me. Oh, what the fuck is happening?”

His legs began to tremble, and coherent speech gave way to primal noises like some demonic incantation.

The realisation that he was about to cum was the trigger for my own climax, surging up as if from the core of the earth, up through my feet, and rushing up my legs to fill my tubes and glands with my thick essence. A massive dam had burst its banks, and the flood was gushing upwards with a potent tidal force. 

The only noises were our carnal cries of shameless joy and the wet splashing of the lube in Freddie’s hole. 

Or at least they should have been the only noises, but in a distant corner of my mind I thought I heard some others, forbidden and impossible, like footsteps on a staircase and a woman calling out my name. 

I lost full consciousness again for everything but sexual pleasure as Freddie seemed to explode around my cock, his bottom shaking, legs like jelly, and head thrashing to and fro. Then suddenly he went quite rigid, and as I continued to pound his prostate, a great arc of semen emerged from beneath him and splashed up onto the dressing table mirror. His very first hands-free sissygasm. He let out a banshee wail and screamed aloud at the top of his voice, “Oh Daddy, I’m cumming like a girl,” as two, three, half a dozen more squirts of cum shot up onto the table.

At this point, my own penis erupted, and I slammed into him with great force, driven by the ancient instinct to deep-seed the womb.

A huge wave of my thick cream flooded his bowels, and I heard him moan with the joy and satisfaction of knowing that he'd milked me.

As my weapon recoiled, reloaded, and prepared to unleash its second salvo, the noises off were there again, terrible and real now; cold horror gripped my chest.

Even as I looked and saw the doorknob turning, I was powerless to stop my hips thrusting forward, my cock surging into his colon, and my balls delivering their second jet of sperm, this one more massive than the last, cum splashing out of Freddie as his bottom overflowed.

Even as the full horror of what was about to happen dawned on me, I simply couldn’t stop. That in-built instinct spurred me on one last monumental thrust just as the door began to open and as she began to speak:

“My class was cancelled, the instructor was off…" her face appeared. Confusion turned to outrage as my semen filled our son’s sweet bottom, and then her final word, almost inaudible, was “sick.”