Coach’s Protein Shake💦

Chapter 4.

Private Session.

Alex’s POV.

I got to the gym right at 9:45, already kicking myself for showing up this late. The place felt empty as hell; just the AC running and some random weight clanging way in the back. I picked the last training slot because work kept me stuck till eight every damn night. Coach Marcus was the only one still around. Probably dumb on my part.

He was waiting by the squat rack, arms crossed, looking massive like always. Tattoos all over, that tight black shirt stretched across his chest. His wife is eight months pregnant and everybody knows it. He drops her name sometimes like it’s a warning sign.

“You’re late, Alex,” he said, no smile, just that deep voice.

“Sorry Coach. Traffic was shit.”

He threw me a towel. “Warm up. We’re doing heavy squats. Take the hoodie off; I gotta see your form right.”

I yanked the hoodie off quick. My tank was already damp from the walk. Marcus gave me a once-over. His eyes hung on my waist a little longer than normal. I got that shy flush in my face and looked away fast.

Squats started okay. He stood right behind me, hands on my hips for spotting. Every time I dropped, his crotch bumped my ass. Sweat was sliding down my back. His voice came low by my ear. “Chest up. Drive through the heels. Good boy.”

Those words made my dick twitch hard. I tried not to think about it.

Bench press got worse. Marcus stepped over the bench so his thick legs were on both sides of my head. His bulge was right there above my face. I could smell his sweat clear as day. Every push I kept glancing up like an idiot.

“Focus, Alex,” he growled. His hand pressed down on my chest and his thumb grazed my nipple through the shirt. My cock jumped again in my shorts. I hoped he didn’t feel how hard I was getting.

Deadlifts after that. The gym had gone dead silent by then. Last customer gone. Lights at the front switched off. Only the emergency ones left glowing.

Marcus walked over and locked the main door. That click sounded way too loud.

He came back. “Not done yet. Shirt off; I want to check your back without anything in the way.”

My fingers shook a bit pulling the tank top off.

Marcus stepped in close. His big hand landed on my lower back, thumb digging into the spot right above my ass.

“Bend over,” he said.

I bent. He pulled my hips back until my ass was pressed right against his shorts. He was rock hard.

“Coach…” I mumbled, voice coming out small.

He breathed out heavy. “This is so fucked.” His hand stayed put though. “My wife’s probably sitting at home texting me about the baby kicking. And I’m here getting hard over my little brother’s best friend.”

That hit me. Marcus is my best friend’s older brother. I’ve known him since I was a kid sleeping over at their house. This felt wrong as hell.

He spun me around quick and shoved me back against the mirror. The glass was cold on my skin. Marcus boxed me in. One hand went straight down my shorts and grabbed my cock.

“Damn,” he muttered, stroking slow. “You’re already wet. Look at that.” Guilt was thick in his voice but he kept moving his hand. “We really shouldn’t. I own this gym. Got a pregnant wife. If anybody finds out I’m done.”

I gasped and my hips pushed into his fist without thinking. In the mirror I saw the whole thing; me red-faced and half naked, him still dressed but obviously worked up.

He kept stroking, thumb rubbing the tip. Then we both heard keys jingling and footsteps from the back hall. The janitor on his last round.

Marcus froze but didn’t pull his hand out. “Stay quiet.”

He kept stroking me real slow while the steps got closer. My heart was banging. The danger made my dick throb even more.

The janitor yelled out, “Anybody still here? I’m locking up.”

Marcus clapped his free hand over my mouth and whispered hot in my ear. “If he walks in he’ll see me jerking my brother’s best friend. My wife would kill me.”

The footsteps walked past the weights and started fading. Marcus never stopped stroking the whole time, eyes locked on mine, looking guilty as hell but still going.

When it got quiet again he pulled his hand free. His fingers were shiny.

“This stays between us,” he said rough. “One word and my marriage is over. Gym reputation gone. Your friendship with my brother wrecked.”

I nodded fast, too shy to say anything smart.

Marcus stared at me another second, then gave a small smirk even with the guilt all over his face.

“Good boy.”

He leaned in, lips close to my ear.

“Tell me you want Coach’s cock.”

My voice cracked. “I want it, Coach.”

He let out a low groan, like he was fighting himself.

“We’re just getting started then. But if we get caught…”

The sentence just hung there.