It was the middle of summer, and Nick had just returned from a long day of football workouts. He'd headed straight home after the afternoon session, still hot and sweaty from the exhausting practice out in the sizzling heat. His jock was soaked with sweat, as were his cotton workout shorts and muscle shirt. He hadn't bothered to shower yet, because he had plans for how to unwind that evening. He found his dad Steve in the kitchen, bent over and looking into the fridge. He was wearing a long-sleeved office shirt with a tie and tan slacks. Nick grinned and walked over. His dad heard him coming and turned around.
"Hey, welcome home," he started. "You want to go change before supper?"
"I've got other plans," Nick growled in reply. His dad's expression grew slightly slack at the tone, and Nick grinned at the sight, knowing that his daily fuckings over the last month had firmly taught his Steve when he was Nick's dad and when he was Nick's fuck toy. Right now it was time for the latter. He grabbed the tie and pulled Steve closer. "I'm all tired and sweaty. You're gonna help me out with that."
"Yes, sir," Steve mumbled.
Nick pulled him tighter. Despite their age difference, they were about the same height, because Nick had quickly grown up. "I had a long, hard, practice, and now I'm just soaked. I bet you like that, don't you, boy?"
"Yeah, sir," Steve said, sniffing at his sweaty shirt. "It smells great, sir. Strong."
"Of course it does. I'm a real man, not like you. Go on, taste it." He shoved his dad's face into his armpit and Steve obediently started to swipe his tongue across the skin and through the hair, tasting the delicious salty taste of the jock's sweat. The older man moaned as the powerful scent filled his nose. Nick let him keep licking for a minute until he was clean, then forced his dad to his other pity until it was clean as well.
"On your knees, pig," Nick said, shoving Steve roughly down. He dropped his shorts and stepped out of them. Steve's eyes were wide and glazed as he was confronted with Nick's sweat-stained jock. It could barely contain his huge package, and Steve nuzzled at it and felt the cock inside swell against his cheek. Instead of letting his taste it, though, Nick turned around and bent over the table, presenting his dad with his ass. "Get to it."
Nick's scent was almost overpowering as Steve ducked his head in between the smooth, hard mounds. He began to lick his son's crack, where the sweat clung to the twisted hair, before he started to rim his puckered hole. The ring of muscle was tight and unyielding, tense from the long workout just like the rest of Nick's body. The teen groaned as he was gently worked open, his dad's tongue circling around his hole and slowly massaging it open. He was going to slow, though, so Nick reached back and jammed his dad's face into his crack.
"Harder, boy," he grunted. "I'm not a fucking pussy like you are. Get me cleaned out."
Steve took it to heart and his tongue plunged in deep, roughly probing at the hole. Nick through his head back in pleasure and said, "Yeah, that's better. Eat that ass out, boy. You love it, don't you pig? Love having to eat out a jock's sweaty ass. I bet you wish you could fuck it, too. You'd probably love to fuck a teen's tight, sweet ass, use it to dump your load it. Too bad, though, because it's not going to happen. The only ass getting fucked around here is yours. A bitch like you wouldn't know what to do with the chance anyways."
Having had enough, Nick pushed his dad away and turned around, making Steve whine in protest. Nick grabbed hold of his chin and forced his face up. "You've done a good job today, haven't you? You think you deserve a treat?"
"Yes, sir," Steve said, "I want a treat, sir."
"Hmmm." Nick ran a hand along the bulge in his jock, then pulled the fabric aside to let his cock and balls come free. "Lick my balls, boy. Get them clean for me and I might let you have a little more." Steve eagerly leaned forward and began lapping at his hairy sack, his tongue deftly tracing through every wrinkle and crevice to get at the built-up musk and sweat from the day. Then he opened his mouth up and took one ball in entirely, sucking on it until every last drop of sweat had been cleaned off before letting it loose and taking in the other. He ducked down and licked down Nick's perineum, all the while ignoring the heavy red cock jutting out from the teen's bush. He knew better than to touch it until he'd been given permission to do so.
Nick took ahold of his head again and pushed him back. He tapped Steve's lips with the tip of his cock, leaving a drop of precome there that he quickly licked away. "You want to have your son's dick in your mouth now, cocksucker?"
"Please, sir," Steve begged, "I want your cock so bad, sir."
"Open up," Nick ordered with a grin. His dad obeyed and he slid his cock into the wet, welcoming hole. Steve groaned at the feel of his son's thick meat pushing past his lips to rest hot and heavy on his tongue. It was every bit as sweaty and raunchy as the rest of his boy had been, having soaked all day trapped in the jock, and there was even the heady hint of piss mixed in. Nick smirked and drew out until only his cock head was still inside. His dad wrapped his lips around it and his tongue flicked at the piss slit to taste the growing flow of precome.
"You want to blow me, boy, don't you?" he growled. "You want to service the jock, want to suck me until I empty my teen load into you?" His dad moaned in assent and his smirk grew. "Well, too bad. I'm not in the mood. I'm gonna use your hole how I like, and right now I'd like to fuck it."
He started to do just that, holding his dad's head tightly and beginning to rock his hips forward in fast, deep thrusts. Steve only had a moment to prepare before Nick thrust in deep, shoving past the resistance and down into his throat before withdrawing and leaving him gagging. Nick chuckled and shoved his head down onto his cock, forcing him down until his nose was buried in his bush. "Take a breath, boy." Steve breathed in the powerful musk of his son, and then Nick was face-fucking him again, hard and fast and uncaring about his dad's discomfort. He forced Steve's head up so he could get at the right angle to bury himself all the way, cutting off his air. He only paused for a few moments occasionally to let him breath before resuming again. Steve could only moan as his mouth was brutally used.
Suddenly, Nick's grip in his hair grew painful, and his cock swelled and throbbed. "Fuck," he grunted as he emptied himself into his dad's throat, "fuck, I'm dumping my load, cocksucker. Fuck, you're so good, fag."
His balls emptied, Nick stepped back and stared down at his dad. He was red-faced and his lips were bruised from the hard fucking, and further down there was a damp spot on the front of his slacks where his own cock was hard and leaking. Nick grinned and nudged it with his foot, tracing the line with his sneaker. "You better not come, boy. Not till I tell you. Now, I'm going to go have a nap. Fix me some dinner, I'm starving."
They spent the rest of the evening doing their own things, his dad trimming the lawn and filling out bills while Nick watched TV and nursed a beer. When it was late, Steve trudged upstairs. Nick grinned and took his time to finish his show before going up to the master bedroom. There, he found Steve on his hands and knees, two fingers already buried in his ass and working up to a third.
"Good boy," he said, stripping off his muscle shirt. He left his jock on, though, because he'd decided to keep wearing it around until it was really raunchy. He dropped onto the bed and spread his legs out, putting his hand under his head.
"I'm too tired to fuck you proper," he explained. "So I want you to ride me."
"Yes, sir." Steve eagerly straddled his son and reached back to guide the teen's seven-incher to his hole. He slowly sank down onto it, groaning at the slight pain as it spread his hole even further than it already was.
"God, you've got such a tight ass," Nick sighed. He looked up at his dad and admired his strong build and hairy chest and stomach. He smirked at that, comparing it to his own body. He was even more muscled and didn't have the thin layer of fat his dad did, but most of his body was smooth, except for the thick bush in his crotch, a small patch of chest hair, and wiry hair on his arms and legs. Anyone seeing them would have expected their positions to be reversed, which went to show just how studly he was.
Steve began to rock up and down, slowly at first and then faster. His own cock was at full attention, red and dripping copiously. It six inches and thick, but not quite as long or quite as thick as his master's, and he knew it. He desperately wanted to touch it, but instead grasped at the sheets.
"Heh, look at you," Nick said. "You're loving this. It's so hot, watching you fuck yourself. I bet I could set up a pole on the bed and you'd be screwing yourself silly all day if you could, filling up that hungry ass of yours. Wouldn't be as good as the real thing, but you'd get it up there anyways."
"Yes, sir," Steve moaned, his voice tight. Every downward thrust was sending the jock's cock right across his prostate, but he didn't dare change the angle because Nick would notice. "I love having my ass filled, sir. Want it all the time."
"'Course you do," Nick replied. "I bet you dream of having me up your ass all day long, don't you? You wish I could come in during work and give it to you, fuck you silly. It's cause you're a slut."
"'M a slut," Steve agree. Nick reached down and gripped his thighs tightly.
"You're a fucking bitch, boy," he growled, closing his eyes. "Cum slut. I'm gonna fill you up, boy. Dump another load into your pussy, gonna breed your ass with your own son's sperm. Fuck, it's great, fuck, fuck, fuck!"
Nick blew his load, his hot boy sperm filling up his dad's ass. He forced his dad down hard and thrust a few times, spraying his come deep into his gut. The hot wetness inside him was too much, and Steve came as well with a sob. His come splattered all over his son's smooth stomach.
"Damn it, boy, look what you did," Nick said, voice full of irritation. "Clean me up, then I'll deal with you."
Steve eagerly cleaned up his mess, licking every last drop off his son's stomach. He moved lower and cleaned his cock of ass juice and lube, too, before tucking it back into the jock. He whispered, "Can I have your piss, sir?"
"Hell, no." Nick clucked his tongue and rather than comfort Steve as usual he instead shoved him off and got off the bed. "After all I've done for you, you still can't follow a simple rule," Nick said, shaking his head. "I fuck you every night, let you suck me off, treat you well, even let you come a couple of times a week. There's probably plenty of other sluts out there who'd love to have a jock for their master. Get on your back and spread."
Steve hung his head and obeyed, watching as Nick left the room. He returned a minute later, holding a package and still looking disappointed. "If you weren't my dad, I'd probably get rid of you right now. Then again, it's my fault for not helping you out. Close your eyes."
Steve obeyed and Nick smiled wickedly. He didn't let Steve have a chance to relax, but quickly pulled out his new toy - a clear plastic long-term chastity device. He quickly fitted it to his dad, making sure to adjust it for a comfortable fit because it'd be on there a long time, then locked it up. By the time Steve realized what he'd done, it was too late. "There. I think we'll start with a month for punishment, but if you're a very good boy and don't complain, I might let you come again in two or three weeks."
He grinned as Steve laid back and groaned at the thought.