She knelt on the cold concrete floor, wrists locked in heavy steel cuffs that rattled every time she shifted.

Thick chains ran from those cuffs up to bolts in the ceiling, pulling her arms high and forcing her to stay on her knees with her back arched. Her ass was already striped red from the first round of spanking, and more was coming.
Mark walked around her slowly, boots echoing. He grabbed a fistful of her hair and yanked her head back. "Look at this bondage girl, all chained up and dripping. You want that chain fuck in your ass, don't you?"
"Yes, Sir," she breathed, voice hoarse.
He let go and the chains clinked as she dropped her head again. The next slap landed hard across both cheeks, the sound cracking through the room. She jerked forward, chains pulling tight, and moaned. Another slap, then another, his palm leaving hot prints. He switched to the leather strap, laying it across her ass in steady, burning strokes until she was gasping and pushing back for more.
"Count them," he ordered.
"Ten, Sir. Eleven, Sir." Each number came out rougher as the strap bit deeper. Her skin burned, but her cunt throbbed, slick running down her thighs. The chains held her exactly where he wanted, ass presented and helpless.
When he finally dropped the strap, he stepped in close and rubbed his hard cock along the crack of her ass. "You ready for this dick in your tight hole?"
"Please fuck my ass, Sir. Chain me and use me."
Mark spat on her hole, worked two fingers in deep, then lined up. He pushed the thick head past the ring and drove straight in, burying half his length on the first thrust. She cried out, chains rattling hard as her body tried to adjust. He didn't wait. He pulled back and slammed home again, fucking her ass with long, brutal strokes that made the chains swing and her tits bounce.
"Take it, bondage slut. That's what these chains are for." He gripped her hips and pounded harder, the wet slap of skin on skin mixing with the metallic rattle. Every thrust shoved her forward until the cuffs bit her wrists. He reached around and slapped her clit a few times, then spanked her already sore ass while his cock stretched her open.
She came first, ass clenching around him, chains jerking as she shook. He kept fucking through it, driving deeper, then pulled out just long enough to add more spit and slam back in. The second round was rougher. He wrapped the loose chain around her waist, using it like a handle to yank her back onto his cock with every thrust.
"Fuck, this ass is perfect. Gonna fill it up." His voice was low and filthy, telling her exactly how she looked chained and spread, how her hole was gaping around him, how he was going to spank her again after he came so she felt it for days.
He unloaded deep in her ass, grinding in and holding there while the chains kept her pinned. When he finally pulled out, cum leaked down her thighs. He unhooked the ceiling chains but left the cuffs on, pushing her onto her back on the padded bench. Her legs were spread and chained to the sides now, ass still sore and used.
Mark picked up the strap again. "Five more on that used hole. Then you can suck me clean."
She nodded, already lifting her hips for the next round. The chains held her open, ready for whatever he wanted next. The night was far from over.