Kalista taught classes four times a week for a month. Mateo decided he should avoid them--and maybe avoid Kalista, as much as he liked her, for the sake of a healthy business relationship with his new contractor. But he felt obliged to attend the first few classes just to see how she was getting along with his members. Even hiding at the back of the class, the sight of Kalista bending and flexing did embarrassing things to him. The sound of her voice as she led them through her routine brought Mateo's mind back again and again to their interlude in the shower--it didn't help he'd been jerking off to the memory every night since.
*You're conditioning yourself like a pigeon in an experiment, dummy,* he had chided himself. *You won't be able to even hear her name without getting a hard on at this rate.* But it felt too good to stop.
It was a problem, though. When Mateo realized he was following Kalista's instructions just like she wanted him to, even in the innocent setting of the fitness class, it never failed to make him hard. He'd meant to stop going to the classes, but all it took was her approval at his being there, that smile and the wicked glimmer in her eyes, and he found himself showing up day after day. Unable to abandon the classes themselves, he'd taken to slipping out early and hiding in his office until most of the members had left--and his erection had finally calmed down.
Today was another of those days. He'd shown up for Kalista's class, left a few minutes before the end in a horny daze, and put himself through a long, hard workout to keep his mind off his seductive fitness instructor for at least a couple of hours. By the time he had cooled down and left the weight room, the sun was going down and the gym was almost empty.
"Headed to the showers?" came her low, sultry voice. Kalista stepped away from the locker she'd been leaning against. Waiting for him.
She was wearing luxurious turquoise workout tights that clung to the sculpted curves of her ass and her muscular thighs. As if the mere sight wasn't enough to send cracks spreading along the fragile surface of Mateo's resolve, she pressed her body against him in the narrow corridor. Kalista pushed him against the lockers and arched her back so her ass caressed his cock, back and forth. He was already visibly stiff under the material of his sweats, and the desperate throb of pleasure so tightly associated with the touch of her firm flesh made his thoughts dissolve into a warm shimmering haze.
Mateo put his arms around her, but instead of sliding them hungrily up and down her body, down between her thighs, exploring Kalista like he ached to, he was helpless to take the initiative. He could only stand still and feel his whole body stiffen, throbbing and rigid, as she rhythmically ground herself against him.
Soon his hips were flexing and his cock was pulsing in time to the beat, desperate to press deeper between the perfect globes of her ass. Kalista felt so good through the mixed textures of his sweatpants and her tights, and all Mateo could do was imagine her glorious body, gleaming with sweat, smooth and sculpted and opening to him, her perfect curves captivating him completely as she bent towards the lockers and arched her back and spread herself so he could finally, finally slide inside her...
But her spell trapped Mateo in place, humping and struggling not to let himself drool at the thought of her naked body. He swallowed hard and realized how dizzy he was. Just from this, from Kalista rubbing her ass against him? He'd never responded to anyone this powerfully before. She reduced him so easily to a horny, whimpering teenager, as though the hot bolts of pleasure that shot from his straining cock up through his spine to soften his brain into a warm, stupid haze were an entirely new experience, new and intoxicating.
