I Took Revenge On My Cheating Ex and Best friend

Ariana Cole stepped out of her car, her body aching from exhaustion. The dull throb in her abdomen reminded her of the pain she had been enduring all day, a sharp contrast to the warmth and comfort she had hoped to find in Liam's arms. She had called him earlier, her voice weak as she told him about her worsening condition. He had sounded rushed, dismissive even, as he claimed he was in a "business meeting" that couldn't be interrupted.

Now, standing in front of his penthouse door, something felt... off.

She reached for the handle, the key in her grip slick with sweat. She hesitated. The air was eerily silent, except for the faint hum of the city beyond the floor-to-ceiling windows. Then-

A muffled giggle.

Ariana's heart clenched. She knew that sound. Knew it intimately. It was a laugh she had heard a thousand times over late-night cocktails, whispered secrets, and inside jokes.

Sienna.

Ariana's breathing shallowed. She swallowed the lump in her throat and forced herself to turn the key. The lock clicked open, the sound slicing through the silence like a warning shot.

She stepped inside.

The penthouse smelled of lavender and musk-a scent she didn't recognize. The living room was dim, only the glow from the city lights illuminating the sleek furniture. Her pulse thundered in her ears as she took slow, deliberate steps toward the bedroom.

A quiet moan. A breathless whisper. Sheets rustling.

Her vision blurred at the edges, her stomach churning. Still, she moved forward, the pull of truth stronger than her dread.

The bedroom door was slightly ajar. Through the narrow gap, she saw movement-bare skin against silk sheets, limbs entwined. A low, intimate chuckle. Liam's chuckle.

The room tilted. Ariana gripped the doorframe, her fingers digging into the wood. Her breath came in uneven gasps, a storm raging inside her, but she refused to crumble. Not yet. Not before she saw.

With a final surge of determination, she pushed the door open.

Time slowed.

There, tangled in the bed she had once considered her sanctuary, were Liam and Sienna.

Sienna's head was thrown back, her golden hair fanned out on the pillows like a mockery of innocence. Liam hovered over her, his bare back shifting as he pressed kisses along her collarbone. The sheets were a mess of tangled limbs, silk against sweat-slicked skin.

For a split second, neither of them noticed her. And for that split second, Ariana's world crumbled.

The man she had loved for years. The best friend she had trusted with everything. Together. Like this.

Then Sienna's eyes fluttered open.

Ariana saw it-the moment realization struck, the split-second widening of her pupils, the flicker of horror before she scrambled away, clutching the sheets to her chest.

"Liam!" Sienna gasped, shoving at his shoulder.

Liam turned, confusion morphing into panic when he saw Ariana standing there. His mouth opened, closed, then opened again, as if scrambling for an explanation.

"Ariana-"

She laughed. A sharp, humorless sound that burned in her throat.

"Wow," she whispered, stepping further into the room. "This is... unbelievable."

Liam shot out of bed, yanking the sheet around his waist. "Baby, this-this isn't what it looks like."

Ariana arched a brow, arms crossing over her chest to keep from shaking. "Oh? Because it looks like my boyfriend is screwing my best friend while I was out dealing with excruciating pain and thought I could count on him."

Sienna flinched. "Ari, please-"

"Shut up," Ariana snapped, her voice shaking. "Just... shut up."

She turned to Liam. "What do you want to explain? How you lied about your 'business meeting' while you were busy with her? Or how, when I called you earlier, barely able to stand from pain, you barely pretended to care?" Her voice cracked, but she refused to cry.

Liam raked a hand through his hair, his movements frantic. "I-I made a mistake."

Ariana laughed again, but this time, there was venom laced in every syllable. "A mistake?"

Liam took a step toward her, his eyes desperate. "Baby, listen, I swear to you, this meant nothing. It was-"

"Meaningless?" she interrupted, shaking her head. "You expect me to believe that? My best friend? In our bed?"

Sienna whimpered, still clinging to the sheets. "Ariana, please, you have to understand-"

"Oh, I understand perfectly," Ariana said, her voice calm now. Too calm.

Sienna's lip trembled. "I never wanted to hurt you."

Ariana's gaze locked onto hers, cold and unforgiving. "But you did. You both did."

Silence hung between them, heavy and suffocating. Liam's face was twisted in guilt, but there was something else lurking beneath the surface-fear.

Good.

Ariana took a step closer instead of leaving. She wanted to see them squirm. Wanted them to feel even a fraction of the humiliation and pain that clawed at her chest.

She tilted her head, studying Liam. "How long?"

His lips parted, hesitation flickering in his eyes.

"Don't lie," she warned, voice razor-sharp.

Liam swallowed hard. "Ariana, please-"

"How long?" she demanded, her voice rising.

Sienna let out a quiet sob. "It just happened-"

"Liar," Ariana spat, her gaze snapping to her. "How long, Sienna?"

Sienna shrank under her glare, her fingers tightening around the sheets. "A few months..."

Ariana sucked in a sharp breath, her hands clenching into fists. Months. Not days. Not weeks. Months.

She felt something inside her snap. The last fragile thread holding her together burned away into nothing.

A slow, eerie smile curled her lips. "You know what? I should be grateful."

Liam's brows knitted. "What are you talking about?"

Ariana let out a small, humorless chuckle. "I was blind. So, so blind. And now? You've both given me clarity."

She walked over to the nightstand, grabbing Liam's expensive Rolex-the one she had bought for his last birthday. She held it up, inspecting it as if it were some foreign object, then with a flick of her wrist, she hurled it across the room.

It smashed against the wall.

Sienna yelped. Liam flinched.

Ariana stepped forward, her gaze burning. "You don't get to explain. You don't get to beg. You had your chance, Liam. You too, Sienna."

Her voice dipped lower, chilling. "I want you both to remember this moment. Because I will. And when you least expect it... I'll remind you what betrayal feels like."

Sienna trembled. Liam opened his mouth, but for once, he had no words.

Good.

Ariana turned away, but this time, she wasn't retreating. No, she was planning.

She wasn't leaving yet.

Not until she had all the information she needed to destroy them both.

The silence in the room was deafening.

Ariana stood there, her pulse pounding in her ears, drowning out the panicked breaths of the two people who had just shattered her world. Her body was rigid, every muscle locked in place as she stared at the man she had given her heart to and the woman she had once called her sister.

Liam took a hesitant step forward, his hands raised as if approaching a wounded animal. "Ariana, please, let's just talk-"

"Don't." Her voice came out low and dangerous, her entire being coiled tight with barely restrained fury.

Sienna clutched the sheets tighter around her body, her blue eyes wide and glistening with unshed tears. "Ariana, I swear to you, this isn't what you think-"

Ariana let out a sharp, bitter laugh. "Oh? Because from where I'm standing, it looks exactly like what I think it is." Her gaze flicked to Liam, who had the nerve to look guilty. "Tell me, Liam. When did this start? Before or after you told me I was the love of your life?"

Liam swallowed hard, his Adam's apple bobbing. "Baby, listen to me. It didn't mean anything."

Ariana clenched her fists. That excuse. Again.

"It didn't mean anything?" she echoed, her voice shaking with disbelief. "So you're saying that after everything we've built, everything we've shared, you just accidentally ended up in bed with my best friend?" She let out a harsh breath, her vision blurring with unshed tears. "How stupid do you think I am, Liam?"

"I-" Liam raked a hand through his disheveled hair, frustration flickering in his eyes. "I was going through a rough time, okay? Work has been stressful, and I-I made a mistake."

Ariana took a slow step toward him, her gaze burning into his. "Oh, I see. So I should feel sorry for you?" Her voice was deadly calm now. "You poor thing, having to deal with stress. Was cheating the only way to cope? Or was it just easier because she was always right there?"

Sienna let out a strangled sob. "Ari, please, I never wanted this to happen-"

Ariana's head snapped toward her. "You never wanted this to happen?" She took another step, forcing Sienna to shrink back against the headboard. "Then tell me, Sienna, when exactly did it start? The first time you smiled at me and pretended to be my friend? Or was it later, when I was telling you about my relationship problems and you were already in his bed?"

Sienna's lip quivered, but she had no words.

Ariana let out a slow, humorless chuckle. "Right. That's what I thought."

Liam exhaled sharply, stepping between them. "Ariana, I swear, I love you. This-this was a mistake, but it doesn't change how I feel about you."

Ariana felt something inside her snap. How he feels about me?

Her stomach twisted violently, and for the first time since stepping into the room, she felt sick. Truly sick.

"You love me?" she whispered. Her voice trembled, but not with sadness-with rage. Pure, raw rage.

"Yes," Liam said, reaching for her hand.

She slapped it away so hard his head jerked back slightly.

"Don't you dare touch me," she hissed. "You don't get to say you love me, Liam. You don't get to say that."

Liam flinched, his fingers clenching and unclenching at his sides. "I know you're hurt, baby, but-"

Ariana let out a hollow laugh. "Hurt?" She placed a hand over her heart, feeling it hammer against her ribcage. "Hurt is an understatement for what I'm feeling right now, Liam."

Sienna sniffled, her voice small. "Ariana, please, I still care about you-"

Ariana snapped her head in Sienna's direction so fast, the other woman froze mid-sentence.

"Don't you dare say that to me," Ariana whispered, stepping closer. "You don't care about me. If you did, this wouldn't have happened."

Sienna trembled but said nothing.

Ariana let the silence settle between them for a long, agonizing moment before turning back to Liam. "Tell me something, Liam. Did you ever feel guilty?"

Liam's lips parted, but he hesitated.

"Did you ever lie next to me at night," Ariana continued, her voice eerily calm, "and think about what you did? Did you ever touch me and think of her?"

Liam inhaled sharply, and that was all the answer she needed.

She shook her head, blinking back the sting in her eyes. "God, I was such a fool."

"You weren't a fool," Liam said quickly. "Ariana, please, I'll do anything to fix this. I need you-"

"You need me?" Ariana let out a bitter laugh. "No, Liam. What you needed was loyalty. What you needed was self-control. What you needed was to remember that the woman who loved you wasn't just another option."

"Ariana, please-"

"No." She inhaled sharply. "You don't get to beg. You don't get to ask for forgiveness just because I caught you."

Liam ran a hand over his face, exhaling harshly. "Okay. Fine. You're angry. I get it. But what now? Are you just going to throw away everything we have?"

Ariana felt her heart tighten painfully. Everything we have?

She turned slowly, glancing around the room-the same room where they had whispered secrets, made love, planned their future. The same room where Liam had held her when she cried, kissed her awake in the mornings, promised her forever.

And now? Now it was nothing but tainted memories.

Ariana let out a breath and lifted her chin. "You threw it away the moment you touched her."

Liam's face twisted. "Ariana, I love you!"

"You don't," she said, her voice breaking for the first time. "Because if you did, this would have never happened."

Liam's jaw clenched, desperation flashing in his eyes. "I made a mistake-"

"No, Liam," Ariana interrupted, shaking her head. "A mistake is forgetting an anniversary. A mistake is saying something hurtful in an argument. This?" She gestured to the bed, to Sienna, to the wreckage of their relationship. "This is a choice. You made a choice."

Liam opened his mouth, but no words came out.

Sienna sat frozen, tears running down her cheeks.

Ariana inhaled deeply, forcing the tears stinging her eyes to stay put. She wouldn't break here. Not in front of them.

Finally, she turned toward the door.

Liam stepped forward. "Ariana, wait-"

"Don't," she whispered, gripping the doorknob so hard her knuckles turned white. "You made your choice. Now, live with it."

And with that, she walked out.

But as she stepped into the cold night air, something inside her shifted.

The pain wasn't just heartbreak anymore.

It was rage.

It was purpose.

And for the first time, Ariana Cole realized something with absolute clarity-

They would pay.

The night air was cold, but Ariana barely felt it. Her body moved on autopilot, her heels clicking against the pavement as she walked away from the penthouse that had once been her sanctuary. The city lights blurred around her, distorted by the unshed tears burning behind her eyes.

Her fingers curled into fists, nails digging into her palms. How could she have been so blind?

She had always believed in Liam. Trusted him. Loved him.

But now, as she walked aimlessly through the streets, one question clawed at her mind-Had the signs always been there?

And then, like a floodgate breaking open, the memories came crashing in.

Red Flag #1 – The First Lie

It had been six months ago.

Ariana sat on Liam's couch, her long legs curled beneath her as she sipped from a glass of wine. Her dark, wavy hair cascaded over her shoulder, framing her sharp cheekbones and full lips. Her golden-brown skin glowed under the dim living room light, but there was tension in her dark eyes.

She tapped her phone screen, staring at the unanswered text she had sent Liam earlier.

"Hey, are we still on for dinner?"

He hadn't replied, even though the message was marked as read. She frowned, setting her glass down.

The front door swung open moments later, and Liam strolled in, his tie loosened, his shirt wrinkled like he had been out for hours. He froze when he saw her.

"Baby," he greeted, recovering quickly. "Didn't expect you to be here so early."

Ariana tilted her head. "I called. I texted. You didn't answer."

Liam sighed, rubbing his temples. "Work ran late. My phone died."

Ariana frowned, watching as he dropped his keys on the counter. Something about his tone felt... off.

"Really? Because your phone was on when I texted you," she pointed out, studying him. "It even showed you read my message."

For a split second, something flashed across his face-something guilty. Then, just as quickly, it was gone.

"Must've been a glitch," he said smoothly, stepping closer and pressing a quick kiss to her forehead. "I'm sorry, baby. It won't happen again."

She had let it go.

And that was her first mistake.

Red Flag #2 – The Weekend He Cancelled

It was supposed to be their weekend away.

Ariana had planned everything-a cozy cabin by the lake, just the two of them, no distractions. She had packed the night before, excited for a break from the chaos of work.

Then, at the last minute, Liam canceled.

She had been sitting on her bed, her dark curls tied in a loose bun, her suitcase zipped and ready to go when the call came.

"Baby," Liam's voice came through the speaker. "I have to cancel. Something urgent came up at work."

Disappointment settled like a weight in her stomach. "Can't it wait?"

Liam sighed. "I wish it could, but it's an emergency. I'll make it up to you, okay?"

Ariana hesitated. "You swear?"

"I swear."

She had believed him.

But two days later, she saw a picture on social media.

Liam-at a party, drink in hand, laughing with a group of friends.

Including Sienna.

Ariana had confronted him, anger burning in her veins. "I thought you had an emergency!"

Liam had sighed, running a hand through his hair. "I did. It was a work event, and I didn't want to stress you out. I knew you'd be upset if I canceled, so I figured it was better to just... not tell you."

And like a fool, she had let it go.

Red Flag #3 – The Way Sienna Looked at Him

Ariana had known Sienna since college. They had been inseparable-sisters in everything but blood.

So when Sienna had started getting too comfortable around Liam, Ariana had pushed down the unease, convincing herself she was overthinking.

But now, looking back? She should have trusted her instincts.

She remembered the night clearly.

They had been out for drinks, just the three of them. Liam had gone to get their second round, leaving Ariana and Sienna alone at the table.

Ariana had caught it then-the way Sienna's eyes followed him as he walked away. The way her lips parted slightly, like she was mesmerized by him.

It had been subtle. Too subtle. But Ariana had felt the shift in the air.

"You're staring," she had teased, forcing herself to laugh.

Sienna had blinked, snapping out of her daze. "What? No, I was just-" She giggled, shaking her head. "You know how it is. Liam's just one of those guys who commands attention."

Ariana had smiled, pushing down the tiny sliver of doubt that had wormed its way into her heart.

Why hadn't she pressed further? Why hadn't she trusted her gut?

Red Flag #4 – The Phone Call at Midnight

It had been late.

Ariana had been drifting off to sleep when she heard Liam's phone vibrate on the nightstand. She wouldn't have thought anything of it-except Liam's entire body had tensed the moment the sound filled the room.

Her sleepy mind had barely processed the shift in his breathing before he snatched the phone off the table, turning the screen away from her as he answered.

"Yeah?" His voice was hushed, cautious.

Ariana had propped herself up on one elbow, blinking the sleep from her eyes. "Who is it?"

Liam had glanced at her, his expression unreadable. "Work," he said quickly. "Go back to sleep, baby."

And then he had gotten up, stepping out onto the balcony, closing the door behind him.

Ariana had stared at the empty space beside her, unease creeping into her chest.

She should have demanded answers. She should have followed him outside.

But she hadn't.

She had ignored it.

And now?

Now she was paying the price.

Ariana inhaled sharply, her legs finally slowing as she came to a stop in the middle of an empty street.

The streetlights cast a soft glow against her golden-brown skin, highlighting the sharp angles of her jaw, the depth of her dark eyes.

She pressed a hand to her chest, feeling the rapid beat of her heart.

The signs had always been there.

The lies. The betrayals. The moments she had excused.

She had let it all happen.

But no more.

Ariana lifted her chin, her jaw tightening.

She may have ignored the red flags before.

But now?

Now she would never ignore them again.

And Liam and Sienna?

They were going to regret every single time they had fooled her.