His sub betrayed him, breaking his trust and sharing a secret she wasn't supposed to share. Now, he's going to punish her.
--
He looked down at the trembling sub beneath him. She looked beautiful on her knees, her eyes cast to the floor, her hands resting on her knees. He knew it hurt, kneeling naked on the hard floor like that. That'd be the least of the hurts he'd inflict on her tonight.
"Look at me."
She obeyed his directive, and he savored the feeling of being above her, the nerves running through her big eyes.
"You know you deserve to be punished. I don't plan on going easy on you."
"Yes sir."
"I am going to push you to the edge of your limits," he said. "I'm going to hurt you. A lot. I won't give you anything more than you can take, but you are going to take it. Understood?"
"Y-yes," she said. He gave her a stern look. "Yes, sir."
"Good. Follow me."
He led her to the spanking bench, then made her wait while he went to the cabinet for a brutal pair of nipple clamps. He had her put her arms behind her back while he slapped and pinched her nipples until they were hard and wanting, then snapped the unforgiving clamps on them with little ceremony. She was used to this treatment and took it without complaint, letting out nothing more than a few whimpers as he bent her over the bench, the clamps and the heavy chain between them weighing down her sensitive nipples. He cuffed her arms and legs, then attached the clamps' chain to a connection point on the bench, which would pull at her every time she flinched. He planned on making her flinch quite a bit.
He left again, gathering lube and a massive plug. He made sure she caught a good look at the plug before he moved behind her. It was the largest he'd ever used on her, with a flange as thick as his cock. She got a few shades paler as he walked towards her, but didn't say anything. He had her well trained-- she knew if she complained or begged she'd have to deal with a massive ball gag in her mouth too.
He went right in with two lubed fingers, quickly adding a third and then a fourth. He replaced his fingers with the plug, and he took his sweet time working it into her, fucking her at its widest width, enjoying the sounds of her small whimpers. "Your tight little asshole is going to be so sore from the plug," he said. "But that's not going to stop me from fucking it, is it?"
"No, sir," she sobbed.
"Why not?"
"Because--" she paused on a breath as he pushed the plug fully into her with a particularly brutal thrust. "Because dirty maso sluts like me need to be hurt."
"You do."
He let her stew as he surveyed possibly spanking implements. He had his collection displayed on the wall, set up so that his sub could watch and anticipate as he perused. He wound up selecting a strap, a cane, and a short single-tailed whip.
"Are you ready?"
--
She was not ready, but it wasn't a real question, so she gave him the required "yes, sir" regardless. She knew she deserved this. She had blatantly broke a rule, broken his trust, broken the bonds that they'd built. She needed this punishment as much as he did.
Still, it was hard to keep that in mind when he started in with the strap. She barely got any warm-up, just a brutal onslaught across her ass, thighs, and, at random intervals when he was feeling particularly cruel, her pussy. Those were the worst strikes, not just because of the pain, but because she felt her wetness transfer to whatever area he struck next. She'd known she was a masochist for a long, long time, but it never got any less embarrassing to receive direct evidence of how much this rough treatment turned her on.
He didn't give her a count, which usually meant the count was going to be really fucking high. She didn't know how many strikes she took, but it was enough that her entire backside was red hot. Her nipples throbbed from the pull of the clamps, and her asshole was still stretched to its limits around the ungodly size of the plug. And she still had the cane and the whip to go.
Finally, she couldn't take it anymore, and a strangled "please" fell out of her lips. He punished her with a brutal strike right over the base of the plug, then put the strap down and moved around to her front. He dug a hand into her hair and yanked her up. Her mouth dropped open instinctually at the treatment, knowing what would come next-- the hard pulse of his cock driving down her throat, taking her without any regard for anything other than his own pleasure.
She wanted it, welcomed it, needed it. She was his hole, and even when she gagged around him, she let him plunder her throat. He kept thrusting as he reached down and flicked the clamps off her nipples, holding his cock deep in her mouth as she screamed at the pain of the blood flowing back to the sensitive tips.