A week passed by after Nick put a chastity device on his dad Steve, and then another, and another. Every day, the jock teen would fuck his slave, two or three times a day, and every day the torture would get worse. His balls felt like they were going to explode any second, and his cock was constantly aching. It desperately wanted to get hard, but the plastic around it was unyielding. He hadn't been this horny since he had been a teenager, and even then he'd always been able to jack himself off, or better yet get laid. Now he was getting laid all the time, but that only made it worse, because having his son's big cock up his ass and massaging his prostate just got him even more riled up. No matter how much he begged and pleaded, Nick wouldn't let him out. The device had only come off once at the end of the second week so Nick could make sure he wasn't getting any rashes and then it'd gone straight back on. Steve knew that sooner or latter he was going to snap. Nick knew it too, and he was waiting with anticipation for his dad's final breakdown and complete submission to him.
That moment came late one evening. Steve was stressed out from overtime at work to meet a deadline, and he was pretty sure more than one guy at the office had noticed how antsy he was. Nick, on the other hand, was doing just great. He'd already emptied his balls a few times that day - first in the morning, giving his dad a complete breakfast; again at lunch, during the break between practice sessions, when he'd been sucked off by one of the new junior varsity players; and then he'd blown a third load down his dad's throat a second time at dinner. Now his dad was working his cock again while Nick sprawled on the couch with his legs wide, watching a game. Nick was wearing a tight white muscle shirt and sweats, with his waistband pulled down and increasingly dirty jock moved to the side to free his cock. Steve, on the other hand, was wearing jeans and a flannel shirt, because Nick hadn't let him change when he'd gotten him.
"That's enough of that. Bend over the couch arm and stay there while I get the lube," Nick instructed, after about twenty minutes. He was fully planning on taking his dad's ass a few times that night. That was the last straw for Steve. His jaw ached, his balls were blue, and he hadn't come in forever. He was Nick's father, he was the man of the house, and he wasn't going to put up with this treatment for one more second.
"No," Steve said, and while he'd meant for it to come out deep and authoritative it was instead a high-pitched whine. He shook his head and tried again. "No. You're not fucking me again until I get off. "
Nick stared at his dad where he still knelt between Nick's legs. The jock had a mixture of disbelief and annoyance on his face. "You'd better rethink what you just said, boy, or you're not going to enjoy the results."
"I said no," Steve said again, more confident this time. "Take it off me, or else... or else I'm done. No more anything at all."
"I'm going to fuck you whether you like it or not," Nick growled. He slapped Steve's face, then tried to backhand him but Steve deflected the blow. Nick's frown turned into a feral grin. Sure, he'd been expecting his dad to explode, but not quite like this. This would be a lot of fun.
Steve started to get up, but as he did Nick shoved him hard and he toppled to the floor. Nick pounced on him and they began to struggle for control. The two of them wrestled on the carpet and doing their best to pin the other and force them to submit, and soon they were both panting and sweating hard. Steve was a big and strong man, and he'd done his fair share of fighting in his day, but for all that he couldn't manage to throw off Nick or even get on top. They should have been a close match, because they were the same height and were in good shape, but that wasn't the case. Steve was probably a good twenty pounds heavier, but most of that weight was padding, even though he worked out regularly. Nick was in his prime, and his lean muscles were toned and built from constant lifting and football playing. Steve had a lot of strength and endurance, but in the end Nick had more of both, and the determination needed to win. Steve stopped trying to win and started trying to just get away, but every time he managed to slip out of his son's iron grip he'd only get a few inches away before the young man was on top of him again. In the end Nick had his dad flat on his stomach and spreadeagle, his arms and legs pinned down and face pressed painfully into the carpet.
"That's gonna cost you, you fucking bitch," Nick said. His side was hurting and he knew he'd have bruises on his arms and legs from where they'd hit the furniture as they'd flailed around. "I'm gonna fuck you so hard you're not gonna walk straight for weeks. And you're never gonna get to come, not until you shape up and remember who's in charge around here."
"Stop it," Steve said quickly. "Get off me, I'll get the lube, just let me go."
"Like fuck I am," Nick said, repositioning himself so he straddled his dad's waist. He let go of one of Steve's arms just long enough to yank down Steve's jeans with a hard jerk, and immediately pinned his father again. "You've got me all worked up, boy, so I'm going to fuck you right now."
Nick's body was thrumming with adrenaline and his cock was thick and throbbing. He was always horny as all fuck after a game or after he'd beaten someone down, every instinct telling him that after you proved yourself top dog it was time to go and spread your seed into every waiting hole you could find. He'd fucked dozens of guys like that, and now it was his dad's turn. The teen's cock glistened with his dad's spit and as he slid it into his dad's sweaty crack it left a trail of precum behind it.
"No, stop, I'm sorry, don't, please don't," Steve whimpered. "I don't want you to, please, just stop it and let me go."
"Should have thought of that before you fought me. At least you got me nice and wet, boy, otherwise this be even rougher on you." The head of Nick's cock was pressed up against Steve's entrance now, the tip nudging into the tight ring of muscle. Just the thought of having his son's monster shoved up his unready chute made Steve clench his ass down even more. "Maybe a little pain will do you good, boy. Teach you a lesson you won't forget."
"I just want to come, son," he begged. "Don't fuck me again, I can't stand it, please."
"Here's the thing, dad. You could stop me, but you aren't doing it," Nick growled into Steve's ear. "I gave you a safeword, but I haven't heard it yet."
There was a pregnant pause and then Steve whimpered, "Please, don't."
"Thought so, faggot," Nick said, and he shoved his cock into his dad's waiting fuckhole. It was incredibly tight and hot around him, completely unlubed except for spit and precum. Steve yelled, his voice high and full of pain. It felt like his ass was on fire and his body was being split in half by his son's cock. It was seven inches long and almost three thick, but it might as well have been an entire fucking baseball bat. He yelled again when Nick pulled out and slammed home viciously.
As far as the teen was concerned, he was in high heaven. His dad's ass was tighter around him then it'd even been, fitting like a hot velvet glove around his meat. The friction was great, almost too much, but as he started to fuck his dad in earnest it lessened because he was coating his dad's insides with his precome. He wished he'd tried this before, wished he'd just shoved his dad down to the floor and fucked him like an animal, like a young stallion breeding a surly mare.
"Fuck, you're so tight, you bitch," he said. It was too much for the teen and he blew a load, come filling his dad's ass, but the horny jock only slowed down for a minute. His cock didn't even get fully soft before he was going at it full-speed again, full of adrenaline and riding high off his victory. "Fuck! Yeah, fuck, just shot a load up your ass, bitch. That's what you get for trying to fight me, trying to fight your master. Slave boys that fight get fucked hard, get fucked without prep, get slapped around until they remember their place."
"Shit, yeah," Steve moaned, unable to help himself as his hole was brutally used. It still felt like his entire gut was on fire, but his son's rod was so big that it was pressing his prostate every time it was shoved through his channel. Even if his cock couldn't get hard it still felt great.
"Damn, you little fag, I should have know you'd like it," Nick grunted. "You're such a big slut, you cocksucker. You love having your ass spread wide open and used by a real man, love the feel of a big, throbbing hunk of meat spearing into your gut. You love it when your own fucking son rapes your ass and fucks you so hard you can taste his cock up your fucking mouth. This is what you've been wanting all along, isn't it, bitch? You probably said no just so I'd have to take you, have to force you down, have to take what's mine and claim it. That's what I'm gonna do, gonna mark what's mine with my seed, gonna leave your hole sloppy with my come so anyone who sees it knows you're my whore."
"Nnnnggh." Steve couldn't even form a coherent statement, not even a word. He wanted to deny it, wanted to hate what his son was doing to him, but he couldn't, because in his heart he loved being his son's sub.
"You're mine, you got that? You're nothing except my fuck toy, my cum dump. Your mouth is mine, your ass is mine, your cock is mine. I can fuck your mouth, I can fuck your hole, and I can say if you use your cock our not." Still pounding into Steve, Nick slapped the older man's hip hard. "You got that, bitch?"
"Got it," Steve whimpered.
"So I'm gonna - oh, fuck, yeah, fuck, - I'm gonna forgive you, just once. I'm - fuck it, damn, hold on, shit yeah, I'm coming, I'm breeding my bitch, filling your gut, breeding ya daddy, fuck yeah!" Nick came again, just as hard as the first time. He bit down on his dad's neck hard and marked him. He slumped flat on his dad's back, laying there with his cock still twitching and spurting a last few drops of teen come. Nick stood and stretched out. He was panting and his body glistened with sweat. He looked down at his dazed and barely concious dad, taking in the come leaking from his open hole. He smirked and left the room for few moments to retrieve the hidden key.
Nick returned to the living room and pulled Steve to his feet. He stripped his dad's clothes off, then dragged him upstairs to the main bathroom. Steve didn't resist, just went along compliantly, so out of it that all his objections had disappeared. Nick got him to kneel in the large combination bad and shower.
"Clean off my dick, dad," Nick said, guiding his dad's mouth forward. Steve eagerly licked at it and began sucking. As he did, Nick told him, "Here's the deal, boy. You did a good job, you lasted longer than I expected, but another outburst like that and I'm gonna beat your ass so hard it'll be black and blue. But it was your first time, and so I'm gonna let you off, just this once. Bend over."
Steve bent over and Nick crouched down beside him. First his unlocked the chastity device, carefully setting it and the key outside the tub. Then his stuck two fingers into his dad's abused hole, rubbing them around and coating them with his come and his dad's ass juices. He stood straight once more and tugged his dad up straight.
"Taste it, boy," he said, "and jerk yourself off." Steve's lips were around his fingers in a second, and he immediately started to stroke his six-inch cock. It was already swollen red and leaking precome like crazy, the pent-up juices of three weeks of torment. He closed his eyes as he started to feel tension build in his gut, and that was Nick's signal. He stepped back and raised his cock up, and began to spray his dad down. As the teen's hot piss rained across his body, Steve came with a cry. His cock spurted again and again and again until it was finally spent. Piss spattered into Steve's open mouth and he instinctively leaned forward to get his son's cock in his mouth again, swallowing down even last drop.
"Mine," Nick said, hold his dad's head in his hands as his stream trickled off.
"Yours," Steve agreed. He was never going to complain about his son - his master - again.