Smack them balls flat at the gym

I \[F22\] work the late shift at a small gym on campus. Jax is the quiet guy who cleans the equipment after hours. He’s around 28, tall and lean with messy brown hair he keeps pushing out of his eyes and a couple of faded tattoos on his collarbone that show when his shirt rides up. He always nods at me when I finish my workout, never says much, but I catch him staring at my ass in the mirrors when he thinks I’m not looking.

Last Thursday the gym closed at 10 pm and the place was completely empty because of the rainstorm outside. I stayed late on purpose. I was wearing tight black workout shorts that barely cover half my ass, a cropped white tank top with no bra, and my favorite pink sneakers. My blonde hair was in a high ponytail, still damp from sweating. I walked over to him while he was wiping down the benches.

“Hey Jax,” I said, leaning against the squat rack. “You almost done?”

He straightened up fast, cheeks already turning red. “Yeah… just a few more minutes.”

I smiled and stepped closer. “Mind if I hang around? It’s pouring outside and my dorm is far.”

He shrugged, trying to play it cool. “Sure. I can lock up after.”

I followed him to the small staff room at the back. It’s basically a closet with a beat-up couch, a metal locker, and one dim overhead light. The rain hammered on the tiny window. He started putting away the spray bottles. I sat on the edge of the couch and watched him.

After a minute I patted the spot next to me. “Come sit. You’ve been on your feet all night.”

He hesitated but then sat down. I swung one leg over and straddled his lap without warning. His hands flew to my waist like he didn’t know what else to do. I could already feel him getting hard under me.

I rocked my hips slowly, grinding down on the bulge in his gray sweatpants. “You stare at me every night, Jax. Don’t think I don’t notice.”

He swallowed hard. “Emmy… I—”

“Shh.” I pulled my tank top up and off, letting my tits bounce free right in front of his face. His eyes went wide.

I grabbed the back of his head and pushed his mouth to one nipple. He started sucking like he was starving.

While he licked and sucked, I reached down and tugged his sweatpants and boxers down just enough for his cock to jump out. Nice and thick, already leaking. I wrapped my hand around it and stroked a few times, then lifted up, shoved my shorts to the side, and sank down on him in one slow motion.

Fuck, he filled me perfectly. I moaned loud and started riding him. Steady at first, then faster, bouncing on his cock while the old couch creaked under us. My tits slapped against his chest with every downstroke. Let’s see if he likes a little more tease.

I reached behind me with one hand, cupped his balls, and gave them a soft squeeze. He moaned seemingly liking it. Then a sharp smack on them echoed off the walls. Jax groaned louder into my tits.

I didn’t stop. I slapped them again. Harder. My palm cracked against his tight balls with a loud, wet smack. His whole body twitched under me. I kept riding him deep, ass bouncing, while I delivered another brutal slap. Then another. Each one louder than the last.

“Does that hurt?” I asked, voice sweet while I slammed down on his cock.

“Yeah,” he gasped, but his hips kept thrusting up desperately to meet me.

I grinned and picked up the pace. Every few bounces I reached back and really laid into his balls. Full, open-hand slaps that made his sack bounce and sting. SMACK. SMACK. SMACK. The sound was filthy and loud in the tiny room. His balls were turning red under my palm. Every hard slap made his cock swell even thicker inside my pussy, I could feel it.

I leaned forward, planted my hands on his shoulders for balance, and started slamming down on him like I was trying to break the couch. My ass clapped loudly against his thighs. I reached back again and unleashed a fast, merciless series of slaps…left, right, left, right, cracking my palm against his balls over and over while I rode him hard.

He started whimpering louder. Tears were forming in his eyes. His face was flushed dark red.

I laughed softly and kept going. “Look at you crying already. Your balls are so swollen and red from my slaps and you’re still fucking me like you love it.”

I slowed my bounces for a second, just to make him feel every single slap. I pulled my hand back and delivered three heavy, punishing smacks in a row.

Each one harder than the last. His balls flattened under my palm and bounced back stinging. Jax cried out, actual tears rolling down his cheeks now.

I sped up again, riding him brutally, pussy squeezing tight around his throbbing cock. I kept slapping in rhythm with every bounce. The pain and pleasure mixed together until he was sobbing under me.

“Come for me, Jax,” I finally ordered, voice low and mean. I reared my hand back and gave his balls one last vicious, full-force slap right as I slammed down as deep as I could.

The loudest slap yet rang out. Jax screamed and exploded inside me. Hot, thick spurts flooded my pussy while his whole body shook violently. I kept riding through it, milking every drop out of him and my own orgasm crashed over me seconds later. I shook on top of him, moaning loud, walls clenching hard around his pulsing cock.

When we both finally slowed, I stayed sitting on his cock for a moment, feeling him twitch and leak inside me. His face was a whole mess , red, tear-streaked, completely wrecked. His balls were bright red and swollen from the beating I’d given them.

I leaned down, kissed his wet cheek almost gently, and whispered, “Good boy. Clean this room up… and don’t tell anyone how hard I slapped your balls while I rode you until you cried.”

I climbed off, pulled my shorts back into place, and grabbed my tank top. His cum was already dripping down my thigh. I gave him one last smirk, turned, and walked out into the rain with my head high and my pussy still pulsing.

I know he’ll be feeling those burning slaps every time he sees me from now on.