Determined to tone up, she had committed herself to an intense two hour session with a personal trainer once a week. Going to the gym was always exhausting but it was ultimately worth it. Her trainer was absolutely ruthless and she dreaded her sessions with him because he ran her senseless. But there were more perks beyond the clear physical changes she’d seen in the two months she had been going there. Her trainer was fun and their sessions were always held after the gym closed. She was weak and he thought it was funny to punish her for it, his sadistic tendencies and love for physical fitness combining in callous domination. There were still thirty-six minutes of her session remaining when she tried to tap out.
Tired of her complaining and knowing she still had some fight left in her, he put her on the treadmill and slowly turned up the speed. Her exhausted body could barely stand but she kept running, fighting the urge to give up. The muscles in her legs burned and her arms had nothing left in them from everything he had already made her do. It had been an exhausting week too. She felt his eyes watching her as he began to turn up the speed. “Wait, what?” He left it there until she looked like she was about to give up… then turned it up again. “You’re evil! I can’t… do this!” Watching her squirm trying to keep a pace far greater than she was capable of running was entertaining to him. Tears streamed down her face as she begged for mercy one last time. “Please!!! Slow… it… down! I’m… gonna… fall!” He smiled and leaned in, speaking before turning the dial up completely. “Run or fall.”
She landed on the floor, toppling over herself before ending up on her side. Laughing, he turned off the machine and approached her. “You’re fucking pathetic. Get up.” Trying to watch her comply made him even harder. Her feeble attempts to catch her breath, her inability to move, how little she actually did… all of it was funny to him. She was weak and vulnerable. He was strong and in charge. He deserved what he did to her.
He knelt down beside her and gently touched her body, working his way down to her pussy before swiftly pulling her pants and underwear down to her knees. Holding her legs up by the top of her pants, he slid his rock hard bull cock into her sweaty pussy. Using her for his own pleasure when she was helpless to fight back was always fun. “Dumb whores who can’t keep up get punished.” Whack! He struck the side of her face as his cock slammed balls deep inside pussy. “Dirty slut.” He heard her quietly whimper “more”. “What was that?” “You heard me.” Grabbing her by the face, pushing her cheeks together and slapping her face while thrusting inside her only increased his rage.
His hands moved to her throat and he started to choke her ferociously. “You’re nothing but a worthless cocksleeve slut. Couldn’t even make it through the whole session, can’t even fight me off. Not that it matters because you love this cock anyways. Easy bitch.” The taunting made her eyes roll into the back of her head and he continued to use her until he was ready to cum. He flipped her over and slid his cock inside her arsehole while pushing her face into the floor. She couldn’t think as she felt his cock twitch and her body fill with his cum. He let out a small sigh before discarding her in the middle of the gym to shower himself. “You’re useless.”
Source: reddit.com/r/Erotica/comments/10ciswi/dont_stop_running_mf_cnc_power_exchange_violence