I shook my head hard, trying desperately to push those inappropriate thoughts aside. Just as Samuel instructed, I leaned forward over the exercise ball.

"Excellent, just like that. Hold your position," Samuel said, looking down at my form.

Suddenly, he barked, "Don't let your hips lift!"

He swatted my backside.

All the desire I had just forced myself to suppress ignited again. My legs clamped together uncontrollably, and a wave of warmth flooded my lower body, pooling wetly between my thighs.

Afraid Samuel would notice, I blushed and scrambled to my feet, lowering my gaze. "Sam, I need to go to the changing room for a moment. I'll be right back!"

"Alright, hurry up. Don't take too long!" he called after me.

In the changing room, I quickly stripped out of my clothes. Sure enough, I was soaked.

All of this was Frederick's fault for always being away on business. He had honed my body to be unbearably sensitive, then left me alone in an empty bed. And now, just a light touch on my backside by another man was enough to make me react.

At that thought, I felt utterly wronged, and the fiery restlessness inside me had not subsided at all. In the end, I simply pulled out the little toy I always carried with me, sat back in the chair, and slipped it inside myself.

Just as I switched it to the highest setting, I realized I could see Samuel's back from this angle.

He was doing push-ups. His arms looked as though they were made for weightlifting, and with every downward movement came the sound of his heavy breathing, which made my heart flutter.

Suddenly, the sensation of him slapping my backside just now flashed through my mind.

I couldn't help but wonder if he liked it rough.

In my imagination, I was on my knees before him with my hips raised, while he struck me repeatedly before entering me.

With his solid build, I figured he would make me feel unbelievably good, like nothing I had ever experienced before.

"Please go faster, Sam…"

Lost in the fantasy, I gripped the chair with all my strength and couldn't stop myself from moaning.

My whole body went limp, melting weakly into the chair.

Perhaps I was far too absorbed in my own pleasure, because I hadn't even noticed the pitch-black shadow that had already fallen over me.

It wasn't until I caught a whiff of that sweaty scent that I jerked my head around.

Samuel was right behind me, staring straight at my chest and gulping repeatedly.

Earlier, I had unhooked my bra to heighten the sensation. Now, my pale chest lay completely bare before him.

"You! When did you get here?" I covered myself in a rush.

My face was blazing red. I hung my head, not daring to meet his eyes.

Samuel was panting hard, and his ears were tinged crimson.

"I just came to see what you were doing. What's taking you so long to get changed? Hurry up and come out for your session!"

With that, his gaze lingered on my chest for a few more seconds before he finally turned and left.

I quickly changed and rushed to the bathroom to splash water on my face, trying to calm myself.

When I saw myself in the mirror—hair in disarray and eyes burning with lust—I couldn't stop wondering if I was consumed by desire.

No wonder Samuel had been breathing so hard earlier. I bet he was close to losing control.

The thought of someone as young and handsome as Samuel almost losing control in front of me sent my heart soaring. Even when I walked, I couldn't help but stick out my chest and sway my hips.

Samuel couldn't quite meet my eyes. He stood by the sliding bed and motioned me over. "Next, we're going to practice this position. We'll strap your hands and feet, and you'll stretch out in a wide 'X' shape. It might be a bit challenging, but I'll be right here to support you."

I nodded and walked to the bed, but my gaze drifted downward against my will. After catching me earlier, a prominent bulge was already straining against his pants. Goodness, it looked even bigger than a large cucumber!

After securing my wrists and ankles, Samuel pulled the sliding bed to stretch my legs into that wide 'X'. The sensation made me gasp. "I can't hold it, Sam. It hurts, please let go…"

His ears turned a deep crimson as he released me, and I immediately lost my balance, toppling toward the floor.

Samuel lunged forward and caught me, pressing me tightly against his chest.

As I leaned against his solid chest, I could sense his hammering heart and the warmth of his body. Almost impulsively, I leaned in and licked his firm chest, staring at him with desire-filled eyes. "You're so big…"

Samuel jolted, nearly losing his grip. I slid down against him, landing squarely on the hard length beneath his clothes.

The searing heat nearly overpowered me, and suddenly, it hit me—I had a husband.

I bit down hard on my lower lip, struggling desperately to get away.

"I'm okay now. Let me down. I'm not feeling well today. I'm going to head home…" I said weakly.

Just as I thought I was free, Samuel grabbed my shoulders and pushed me to my knees. "So soon? The session isn't over. If you leave early, it counts as skipping class, and there's a punishment for that!"

I struggled desperately, trying to break free from his hold, but each twist only pressed my hips closer to that massive bulge. The friction intensified until my legs gave out, shaking with helplessness.

I tried to refuse, but the words escaped before I could stop them. "What punishment…"

A sudden smack landed on my backside, sending a shiver through me.

He leaned in, brushing my earlobe gently with his lips, then slid down to my waist and began tugging at my pants. "I'm going to take you right here, little tease."

At that moment, my phone buzzed. It was Frederick.

I quickly picked up, letting Samuel know it was my husband and that he had to stop.

Fred's voice came through. "Darling, I'm coming home tonight! I'm missing you so much right now. Say something to make me smile!"

I stammered, "Fred, I'm at the gym right now, I can't…"

Suddenly, Samuel hooked his arms under my knees, spread my legs wide, and then tried to thrust inside me.