After I get off work from the hospital, I decide to exercise by taking my mountain bike out on a ride. However, that's when I find out that the seat of my mountain bike has been lowered. There's even a blue sticky note with a scribbled heart pasted on the bike handle.

I call my wife, Sabrina Yellin.

"Who took my bike on a ride?"

After a few seconds of silence, Sabrina replies nonchalantly, "Kelly's boyfriend wanted to learn how to ride a mountain bike yesterday, so he practiced a few laps with your bike. What's wrong, though? Is the bike damaged in any way?"

Kelly's boyfriend? But he had boasted about going on an overseas vacation for one whole month last week on his social media account.

My gut feeling tells me that something's fishy about this whole thing. So, I just curl my lips into a smirk.

"Nah. He can keep using it."

After that, I push the mountain bike back to its original parking slot. Then, I find myself two needles so that I can insert them into the seat.

Three days later, when I'm working the night shift at the hospital, a nurse rushes in hurriedly.

"Dr. Hart, there's a male patient in the ER right now. He claims that his crotch was stabbed by needles when he was riding his bike earlier."

"Ms. Yellin, it hurts so much. What should I do? Am I going to die?"

In the emergency room, my wife, Sabrina Yellin's face was etched with concern as she comforted the man in her arms, "It's okay, Zane. I'll get a doctor here right away. You'll be fine. It's so strange, though. Why were there needles on the seat?"

She patted his back gently and leaned down to kiss his forehead.

Her intimate gesture froze me in my tracks.

I knew this man. He was Zane Corbin, a graduate student who'd just joined Sabrina's research team this year, the one she had taken from another professor.

She had once praised him in front of me. "Zane has real potential, and he really listens to me. He's a real find."

So this was what she meant by "a find".

Sabrina's tone was a mix of reproach and heartache as she said, "Seriously, why do you always have to ride my husband's bike when I've already offered to buy you one?"

Zane grinned. "I just wanted to annoy him. Why does he get to have someone as incredible as you? Why can't I be the one to have you?"

At that, Sabrina's usual cold expression softened into a fond smile. "You're just so mischievous."

As I watched that play out, a shiver ran down my spine, and I felt a chill settle deep in my chest.

Sabrina and I had been married for eight years. I thought our relationship was solid.

She was busy with work, but she'd always make time for us to go out, surprise me with gifts, and even hold my hand when we went out.

We had made it past the seven-year itch, but now, could we really keep going?

I pinched my palm and walked over slowly.

"Where's the doc… Adrian?"

When Sabrina saw it was me, her face flickered with a hint of panic, but she quickly masked it.

"Honey? What a coincidence. How did you end up here? The nurse just told me about a male patient with an injury to his lower body." I feigned confusion as I watched her nervously avoid my gaze.

She stammered, "M-My student was injured, so I brought him in."

I glanced at Zane, whose expression was stiff, and smiled faintly. "Zane Corbin, right? Sabrina has mentioned you. Sounds like you're a great student."

The way I emphasized "great student" caused both of their expressions to change.

I looked down at Zane's injury. His lower body was a bloody mess. It was much worse than just a needle prick.

"Why were there needles on the seat? Didn't you check your bike before riding?" I asked.

Zane lowered his head, hiding his expression as he clenched his fist. "Oh, I just didn't expect it."

I casually asked, "Mr. Corbin, do you like to ride bikes? Sabrina isn't really the sporty type, so what are the odds of her bringing you here?"

The air suddenly turned tense.

"Enough, Adrian Hart! Just treat him already. Don't ask so many questions." Sabrina interrupted me coldly. Her eyes betrayed a flash of guilt.

I didn't stop what I was doing, and my smile never faded. "Gosh. We've been together forever. Why the attitude?"

As if suddenly remembering something, I asked Sabrina, "Speaking of bikes, when I asked you who moved my bike, you said it was Kelly's boyfriend. But didn't he go abroad for a vacation?"

Her face turned pale, and I could see her panic creeping in.

"I-I must have gotten the wrong person."

Her expression suddenly darkened, showing a hint of irritation. "Adrian, you're supposed to be treating Zane, not asking questions here! We can talk about this later at home. Seriously, you don't even look like a professional doctor right now."

Zane was quietly watching me when suddenly he let out a sharp cry, "Ah, it hurts!"

He shoved me away, and his eyes filled with tears. "I don't want you to treat me anymore. Mr. Hart, are you mad at me or something? It hurts like hell!"

He pushed me so hard I crashed into a nearby cart, making a loud noise.

Sabrina nervously examined the injury on Zane's lower body. "Does it hurt a lot? Don't worry. I'll take care of it."

She carefully wiped away his tears, then turned to me with a frown. "Adrian, if you can't handle this, get someone else to do it. Don't waste any more time here."

My heart felt like it was being tugged. The pain was bitter and sharp.

I stopped smiling and stared at her with a blank expression. "Yeah, you're right. I can't handle this."

Sabrina froze, and her eyes flashed with anger. "Why didn't you say so earlier, then? You're wasting time! Did you buy your medical license or something? Just get out of the way!"

Rage bubbled up in me, burning through my veins. I forced a smile. "Fine, I'll leave. I'm getting rid of that mountain bike. I don't want something that's been used by someone else. It's tainted."

Sabrina stiffened, her eyes snapping wide. "You…"

I pulled off my gloves and turned to leave. She instinctively started to follow me but paused when she remembered that Zane was still in the hospital.

…

When I got home, exhaustion slowly crept in. I collapsed onto the bed and grabbed my phone to call my friend, Leila Santana.

"Find me a good divorce lawyer." I got straight to the point.

She was quiet for a moment. "You're getting divorced? No way. Are you really going to listen to your dad and go back to take over the family business?"

Her dramatic tone made me chuckle, and I slowly smiled. "You're overthinking. I just think it's time to get a divorce."

Life was too long to keep dragging things out.

"Also, help me look into someone."

Leila quickly replied, "Sure, I've got this. We've been friends for over a decade, after all."

Not long after I hung up the phone, Sabrina came home. She tossed her keys on the floor with a sharp clatter.

"What's your problem, Adrian? Throwing your weight around in a hospital? Really? And what's with all that cryptic talk? It's not funny."

I frowned, saying nothing.

"What's wrong with you?"

After a pause, she spoke through gritted teeth. "Yeah, Zane rode your bike. So what? He just wanted to try riding it, so I helped him out. Is that so wrong?

"But you're really ruthless. You put needles on the seat just to stop someone from using your bike? Do you have any idea how much Zane's hurting right now?"

She stepped toward me while staring at me with a bone-chilling gaze.

Watching her look at me with such pure hatred, I found it almost laughable.

After all these years of marriage, this was the first time I'd seen her this emotional.

Even when I'd been harassed by patients, followed by a knife-wielding lunatic after work, or so sick I nearly blacked out, she always stayed completely indifferent.

"Come on. It's not that big of a deal. It'll all be over," she said.

So why was she acting like a completely different person now?

My gaze landed on the bag she always carried with her.

The black bag had a striking blue sticky note attached to it, matching the one on my mountain bike's handlebars.

It was as if she were claiming ownership.

"Sabrina, you're really good at acting, huh?"

I smirked, poking her in the shoulder. "Do you know Zane's injuries weren't caused by a normal bike ride? They're from him lying on the bike while doing things he shouldn't have been doing."

Watching her face freeze, I pressed harder. "So, how did it feel? Was it good? I bet it was thrilling."

Sabrina's face went from pale to flushed with anger. "You're talking nonsense!"

After saying that, she turned to storm into the bedroom.

I stopped her calmly. "I'm giving you a chance to come clean, Sabrina. Don't waste it."

She stopped and looked at me with a complicated gaze. "Adrian, I don't know what gave you the wrong idea, but Zane is a good student. Our relationship is not as filthy as you think! You're just insulting my profession now."

Just then, the harsh ring of her phone broke the tension.

"Ms. Yellin, where are you?"

Zane's voice, which was filled with helplessness, made Sabrina's expression shift to one of concern.

"The hospital is so noisy. I'm scared. Didn't you say you'd bring me food?" he asked.

Sabrina lowered her voice and replied patiently, "I'll be there as soon as I change. Don't worry. Just rest for now."

"Okay, I'll wait for you."

After hanging up, she shot me a quick glance and quickly changed before rushing out.

My mind was a mess. I collapsed on the bed, letting my thoughts wander.

It soon got late, and my stomach began growling. I was about to order takeout when I saw a screenshot from my friend showing Zane's Instagram post.

The caption read, "Being with you makes me feel truly loved for the first time."

The picture was of Sabrina sleeping by his hospital bed.

My heart dropped.

Sabrina had never stayed out overnight before.

My phone buzzed, interrupting my thoughts. When I answered, Leila told me she had found something.

"Adrian…" Her tone was heavy.

"Zane and Sabrina met at a book club three years ago. She's the one who helped him get into graduate school and into her research team."

I gripped the phone tightly.

Leila continued, "My people found out… that there's a hotel record indicating they were together last Christmas Eve."

Christmas Eve?

That night, Sabrina had told me she'd fallen and lost our baby. I'd been devastated then. However, it turned out that she just went to meet Zane in a hotel.

I felt like my soul was drained. I didn't even remember hanging up the phone before I passed out.

Half-awake, I heard someone banging on the door. "Open up!"

I thought about ignoring it, but the banging grew louder.

I reluctantly dragged myself up and opened the door to find Sabrina's mother, Julia Elliott, looking at me with annoyance.

"Didn't hear me knock? What took you so long?"

She scowled, then caught sight of my bleary eyes and couldn't resist complaining, "Another night shift? Honestly, just quit that job. You're so busy you're barely home, and it's not like it pays well anyway. Sabrina makes more than enough to support you."

My sluggish brain took a moment to process what she was saying. As I looked at her busying herself in the kitchen, I parted my lips. "Mom, Sabrina's cheating on me."

After a long pause, Julia finally said calmly, "Oh, you mean Zane? That's not cheating. They're just really close."

I thought she'd be angry. My chest tightened with a violent tremor. Betrayal tore through me. "You knew?"

She closed the fridge with a nonchalant expression. "Sabrina's an amazing woman. It's only normal for guys to flock to her. Besides, she hasn't done anything wrong. You can't have children now, so stop being so selfish."