My Boyfriend Pushed Me to Desire My Gym Trainer

My name is Romina, though almost everyone calls me Romi. I’m in my twenties, I’m brunette with curly hair, wide hips, and legs it took me years to learn to love. Not long ago I’d gone back to the gym after months without training, and the routine had given me back something I didn’t even know I’d missed.

It all started on a rainy Sunday. Bruno and I were still in bed, awake but with no desire to move, listening to the water beat against the window. We’d made love when we woke up and now we were just chatting, with that warm laziness of mornings with no plans.

“And at the gym?” he asked suddenly, playing with a strand of my hair. “Does anyone look at you too much? Do they come up to you?”

He didn’t say it jealously. He said it with curiosity, almost amused, like someone wanting to learn a new detail about the person sleeping next to him. So I was honest.

“Well... sometimes. Some guys come up to ask for my number or invite me out. But I always tell them the same thing: I have a boyfriend.”

He thought about it for a moment. Then he turned his head on the pillow and looked straight at me.

“Have you never regretted saying no?”

I laughed, a little surprised by the question.

“No.”

“I don’t believe you. Be honest. Isn’t there anyone there you’d want?”

I felt the heat rising up my neck before I answered. There was something, yes, and I’d never told anyone.

“Maybe... the trainer. Tomás. I think he’s cute, cool. That’s all.”

It wasn’t “just that,” and we both knew it.

Bruno’s eyes lit up. He shifted onto his side, propped up on one elbow, and kept pulling the thread.

“And does it turn you on when he corrects your exercises? Does he touch you?”

“Not much. Sometimes he gently grabs my waist from behind to fix my posture.” I lowered my voice. “And yeah, once or twice I got a little turned on.”

That was when I noticed it: Bruno was rubbing himself over his boxer briefs, slowly, looking at me as if I were telling him the sexiest secret in the world. I understood everything at once. My boyfriend got turned on imagining me with someone else.

I decided to play along. I told him that when the gym was about to close, Tomás would stay lifting weights and I would linger on purpose putting my things away, glancing at him out of the corner of my eye, using the excuse of rearranging my bag.

By then Bruno was already masturbating without trying to hide it, right in front of me. He slid his hand under my underwear and gave a low laugh when he realized how wet I was.

“Didn’t you ever think about fucking him right then and there?” he whispered in my ear, stroking my clit with the pad of his fingers.

“Yeah,” I admitted, and the word came out shaking. “I thought about climbing on top of him while he trained, licking his sweaty muscles, pulling down his pants, sucking him slowly... and then riding him until he came.”

I said it as an orgasm split me in two. Bruno finished a few seconds later, splashing his hand, gasping. After that he didn’t ask anything else. We showered, had a late breakfast, and Sunday went on like any other. But something had been lit between us.

***

The next day I had training, and for the first time, I felt uncomfortable. I had the sensation that the scene I’d invented for Bruno had actually happened, as if Tomás could read it on my face. I could barely look him in the eye.

He, of course, knew nothing. He took me through the routine with complete normality, professional as always. But every time he put his hand on my waist to correct me, a cold sweat ran down my back and my throat tightened.

As the days went by, the sensation faded and I started feeling comfortable again. Until Bruno brought up the subject again, and this time more insistently.

“Do you still like it when he grabs your waist?” he’d ask at night. “Or would you prefer him to grab you somewhere else?”

He knew exactly what he was doing. He had planted a filthy little thrill in me and didn’t want it to die out. I wasn’t about to fall behind.

“Want to know how I’d suck him off if I had the chance?” I shot back.

I didn’t give him time to answer. I threw myself on top of him and took him into my mouth while he was still soft, until I felt him growing against my tongue. I sucked him like crazy, pulling off every now and then just to ask if he liked imagining it was the trainer. Bruno moaned, eyes rolling back. It didn’t take long before he filled my mouth, and I swallowed everything without thinking.

I was left hot, restless, with the fantasy clinging to my body. That same afternoon I decided to go to the gym in the last time slot, when almost nobody was left. I brought as little clothing as possible: a tiny thong that disappeared between my ass cheeks and shorts so tight they dug into the same place.

***

I trained legs, glutes, and waist, and this time I decided to ask Tomás for help with everything. I wanted him focused on me, unable to look anywhere else.

For every exercise I did, I asked him to correct me, and he did it kindly. When it was time for glutes, I asked him to touch me to “feel whether the muscles were working properly.” I said it with an innocent face. He, thrown off, barely brushed me, with a shyness that made me feel tender and turned on at the same time.

I insisted several times. And as I did, his hands got bolder, covering more, squeezing more firmly. Until I felt, against the back of his wrist, that he had an erection. Tomás turned red, tried to hide it, and went into the bathroom for a while.

When he came back to the floor, he went off to help another guy, but I caught him glancing at me from the other end. The tension between us was so thick you could almost touch it.

When very few people were left, he came over again to ask how I was doing with the routine. I started doing the exercise wrong on purpose, and he came up behind me and grabbed my waist to correct me. I took the chance to press my ass against him and move just a little, slowly, pretending it was part of the motion.

Tomás looked around nervously, checking that nobody could see us. Instead of letting go, he gripped my hip harder and pulled me toward him. I felt him hard against my ass, rubbing softly, holding himself back. Then he forced himself to stop. His left hand went down, gave my ass one last squeeze, and he stepped away.

He didn’t come near me again. When there was no one left, as was his habit, he started working out alone. I stayed watching him without hiding it, and he kept avoiding my gaze, still hesitating.

I decided to shower there for the first time. I took out my things, left my bag on a bench in the floor area, and on purpose “forgot” the soap. I needed an excuse to go back.

***

I went into the showers, took off everything except my thong, and came back out into the floor wrapped in a towel. I made sure nobody was around and walked over to my bag. Tomás was already packing his things up. I picked up the soap, held it up in front of him, and smiled, showing him what I’d forgotten.

He smiled back. Then I dropped the towel, said “oops” with all the intention in the world, and didn’t pick it up. I stood there, almost naked, looking at him. Tomás turned red, glanced toward the door where the owner could appear; he was still wandering around.

I started walking toward the showers and turned back halfway there.

“Now I’m going to take a shower,” I told him.

“Want help with that too?” he asked, smiling, defeated.

“Could be.”

I went into the changing room. Tomás came in behind me, turned me around, and ate my mouth with a long kiss that had been held back for weeks. I sat him on the bench, climbed on top of him, and started grinding against his crotch while kissing his neck. I pulled off his tank top and licked his pecs, just like I’d told Bruno I would. He squeezed my ass and sucked my breasts with an urgency that drove me crazy.

I knelt down. I pulled down his pants and took him all the way into my mouth, sucking him just as I’d promised my boyfriend I would. Tomás lifted me up, took off my thong, and laid me back on the bench to return the favor with his tongue.

“Doesn’t it bother you that I’m all sweaty?” I asked.

“You’re fucking delicious like this,” he murmured without lifting his head.

Within seconds I had an orgasm that arched my whole body, and I begged him to put it in me already. But he had another idea. He picked me up in his arms, still not penetrating me, and carried me to the shower like that, kissing me the whole way.

He pressed me against the tiles and turned on the water. I was still on top of him. With one hand I managed to guide him to the entrance of my cunt; since I was pretty wet, it only took a small push for him to slide in. At that moment I felt the fantasy had been completely surpassed.

He wasn’t just fucking me with my trainer: he was doing it to me in the gym shower, both of us soaked, water running down our faces. The strength of his arms holding me up, my clit rubbing against his pubic bone, and him all the way inside me gave me the most intense orgasm of my life. The moan that escaped me was probably heard all the way out on the floor.

Tomás slowed down while I trembled, wrapped around him. He set me down slowly on the floor, I turned around to soap myself up, and he stroked my breasts and kissed my neck under the water. I rinsed quickly, stepped out of the shower, and grabbed his cock so he’d follow me, without saying a word.

I knelt over the bench on all fours, and he bent down behind me, running his tongue over me from bottom to top, tasting me without hurry. When I couldn’t take it anymore, I asked him to come back inside. I felt him harder than before, more swollen; clearly that position turned him on even more.

“Put it all the way in,” I begged.

He obeyed until I felt his body pressed against mine. I started moving slowly, pulling him out halfway and then stabbing him back in as deep as I could. At first he matched me, but as I sped up he took control, grabbing my waist hard and pulling me toward him again and again.

I started moaning louder and that turned him on. Suddenly he started spanking me, and it drove me insane. Without losing intensity, he grabbed my hair and warned me, in a broken voice, that he was about to come.

“Inside,” I begged between moans. “As deep as you can.”

He gave the last thrusts nice and deep. I felt the spasms of his cock unloading inside me while he held me from behind, gasping, his ragged breath against the nape of my neck.

***

We got dressed quickly. Before leaving the locker room we shared a short, tongue-filled kiss. Tomás, suddenly worried, asked me if there was any risk of pregnancy. I reassured him: I was on birth control.

When we came out, the gym owner was waiting to lock up. I died of embarrassment, sure he’d heard everything, but he didn’t make any comment. He only looked up.

“Want me to take you home, Sofi?” he asked.

“Sure, thanks.”

(Yes: my real name is Sofía. Romina is what I call myself when I don’t want a stranger to be able to find me later.)

In the car we talked about anything but the gym. The conversation was short, since I don’t live far. When we got to my front door, he flashed a naughty smile and I asked him what was wrong.

“Nothing,” he said. “I hope you had a good time today.”

At that moment I felt like the boldest girl around. I blushed and got out of the car without answering.

Inside, Bruno was waiting for me. As soon as he saw me, he asked why I was getting home so late from the gym. I just smiled and led him by the hand to the bedroom. I lay down on my back, took off my shorts and thong, and spread my legs. Bruno’s eyes went huge when he saw I was still stretched open.

“Did you fuck him in the end?” he asked, his voice rough.

“Yeah,” I answered. “Put a finger in me, deep.”

When he pulled it out, it was stained. I took his hand and slowly sucked his finger, never taking my eyes off him. Bruno went wild-eyed. He pulled down his pants and started masturbating, begging me to tell him everything, from the beginning, without skipping a single detail.

And I did. That night I understood that some games, once they start, have no turning back. And neither of us wanted them to.