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Published:
2026-05-18
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1/1
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Purest Thing

Summary:

When an unsub begins targeting Prentiss, Hotch’s carefully buried feelings finally become impossible to deny, forcing him to choose between control and the woman he loves.

Work Text:

The case had settled over the team like a film of grime.

Not one of those explosive, headline-making cases with dozens of bodies and media swarms. This one was quieter. Meaner. The kind that crawled under skin and stayed there.

The unsub targeted women he believed were “false authorities.” Teachers. Nurses. Social workers. Women who spoke with confidence. Women who corrected him. Women who made him feel small.

He stalked them for days before escalating.

The latest victim had survived, and gave a chilling update before surgery.

“He says he has eyes on an FBI agent. Dark hair,” she’d whispered weakly. “Pretty. He… said she’d understand soon enough.”

Prentiss had fit the description too easily.

And Aaron Hotchner had spent the last twelve hours pretending that realization hadn’t detonated something violent inside his chest.

——

The local precinct smelled like burnt coffee and damp paper. The bullpen buzzed around them as detectives moved between desks, phones rang endlessly, and fluorescent lights hummed overhead.

Prentiss stood beside the evidence board with one shoulder propped casually against it, arms crossed, utterly composed.

“He’s escalating because he’s losing control of the fantasy,” she said. “The women aren’t reacting the way he imagined they would.”

Morgan nodded. “He wants fear.”

“He wants submission,” Reid corrected quietly.

Hotch listened, but his attention kept dragging back to Prentiss.

To the loose strands of dark hair tucked behind her ear.

To the faint bruise near her wrist from the warehouse search earlier that morning.

To the fact that she looked calm.

Too calm.

A detective approached with a folder tucked beneath his arm. “We pulled security footage from outside victim number three’s apartment.”

He handed over still photographs.

Hotch stepped closer automatically.

And there he was.

The unsub.

Watching from across the street.

But that wasn’t what made Hotch’s stomach tighten.

It was the second photo.

Prentiss exiting the hotel two nights earlier.

The unsub standing half-hidden across the street.

Watching her.

Something inside Hotch went cold.

Not hot. Not explosive.

Cold.

Controlled fury was infinitely more dangerous.

Prentiss noticed first. She glanced sideways at him, eyes narrowing slightly.

“Hotch?”

He forced himself to speak evenly. “When was this taken?”

“Tuesday night,” the detective answered.

Tuesday.

His jaw locked.

“You didn’t mention being followed?”

Prentiss exhaled lightly, already understanding where this was going.


“Because I didn’t know I was being followed.”

“You should’ve had someone with you.”

Her gaze sharpened instantly.

“And if I’d known there was a threat, I would have.”

The room shifted subtly.

Morgan looked away.

JJ suddenly became very interested in the file in her hands.

Because everyone could hear it now—that razor-thin edge in Hotch’s voice.

Prentiss, however, didn’t flinch.

Never flinched.

“That’s enough,” she said quietly.

The words weren’t insubordinate.

They were grounding.

A warning and reassurance all at once.

Hotch looked at her.

Really looked at her.

And that terrifying, unbearable realization hit him again:

Someone could take her from him before he ever allowed himself to have her.

——

He’d spent months fighting this.

Maybe longer.

It had started subtly, almost invisibly.

The way his eyes searched for her first when briefings began.

The way exhaustion felt less suffocating when she sat across from him on the jet.

The way her voice could cut through his worst days with terrifying ease.

Emily Prentiss had become dangerous to him slowly.

Which somehow made it worse.

Because Aaron Hotchner did not lose control suddenly.

He lost it in increments.

Measured. Quiet. Catastrophic.

He’d buried the feelings under professionalism. Under routine. Under discipline sharpened so finely it could cut skin.

But sometimes she smiled at him when nobody else noticed.

Sometimes she touched his shoulder in passing.

Sometimes she looked at him with that infuriatingly perceptive gaze, like she could see every fracture beneath the surface.

And he would feel something in his chest threaten to split open.

So he kept his distance.

Because he was her unit chief.

Because she deserved steadiness, not damage.

Because loving someone meant risking becoming the thing that destroyed them.

He knew that better than anyone.

——

The unsub called the precinct just after midnight.

Hotch answered on speaker.

“Hotchner.”

A low chuckle crackled over the line.

“She’s prettier in person.”

Every muscle in Hotch’s body went rigid.

The team went silent around him.

“What do you want?” Hotch asked evenly.

“The brunette,” the unsub said. “The one who thinks she isn’t afraid.”

Hotch’s hand tightened on the edge of the desk hard enough to ache.

Across the room, Prentiss met his eyes.

Steady.

Calm.

Infuriatingly calm.

“You’ve been watching her,” Hotch said.

“I think she needs to learn something.”

The rage inside him became almost disorienting.

Not wild.

Not loud.

Focused.

Murderously focused.

“What lesson is that?” Hotch asked quietly.

“That eventually,” the unsub whispered, “all women scream.”

The line disconnected.

Silence swallowed the room.

Hotch could feel the team watching him.

Waiting.

Measuring.

Prentiss stepped closer first.

“Hotch.”

Only she could make his last name sound gentle instead of professional.

He looked at her.

Alive.

Unhurt.

Still here.

And suddenly another memory surfaced with startling clarity.

Rossi sitting across from him on the jet a year ago, after a different case.

“Do not,” Rossi had said seriously, “let the purest thing in your life slip away.”

At the time, Hotch had pretended to understand.

Rossi had pretended to believe him.

——

The hotel hallway was quiet after midnight.

Muted gold lighting stretched across patterned carpet as Hotch stood outside room 214 staring at the door.

His heartbeat felt absurdly loud.

He had faced serial killers with steadier nerves than this.

For several seconds he considered turning around.

Going back to his room.

Burying this again.

Then he remembered the unsub’s voice.

“She’s prettier in person.”

The thought alone made something vicious rise inside him.

Before he could reconsider, he knocked softly.

A few seconds later the door opened.

Prentiss stood there in gray sleep pants and a navy FBI academy shirt, hair damp and loose around her shoulders.

Her expression shifted immediately from surprise to concern.

“Hotch?”

God.

Seeing her like this—unguarded, tired, real—nearly destroyed the last of his restraint.

“Can I come in?”

She stepped aside instantly.

The room smelled faintly like her soap. Case files were scattered across the desk beside an untouched cup of tea.

Prentiss closed the door behind him carefully.

“You okay?”

No.

Not remotely.

Hotch stood near the window, shoulders rigid beneath his dress shirt.

For a long moment he said nothing.

Prentiss watched him quietly.

Patiently.

The way she always did.

Finally she spoke softly. “You’re scaring me a little.”

That made him turn immediately.

And the expression on his face stole the breath from her lungs.

Not anger.

Not stoicism.

Something far more dangerous.

Honesty.

“When he threatened you,” Hotch said quietly, “I realized I was more afraid than I’ve been in a very long time.”

Prentiss’s expression softened.

“Aaron—”

“I need you to let me finish.”

The words came controlled. Precise.

But she could hear the strain beneath them.

So she nodded once.

Hotch inhaled slowly, like even speaking required discipline.

“I’ve spent months trying to convince myself that what I feel for you is temporary. Unprofessional. Manageable.”

Prentiss went completely still.

“And I can’t do it anymore.”

The room felt painfully quiet.

Hotch looked at her with devastating steadiness.

“You walk into a room and I notice it immediately.” His voice remained low, controlled. “When cases go badly, you are the person I look for first. When something happens to you—”

He stopped briefly.

Gathered himself.

“When something threatens you,” he continued, quieter now, “it feels unbearable.”

Emily’s chest tightened painfully.

Because Aaron Hotchner was not a man careless with words.

Every syllable cost him something.

“I kept telling myself distance was the right thing,” he admitted. “That eventually this would fade.”

A faint, humorless exhale escaped him.

“It hasn’t.”

Prentiss looked almost stunned.

Not because she hadn’t hoped.

But because she knew what this confession required from him.

How terrifying it must be.

Hotch took one slow step closer.

“I am trying very hard,” he said softly, “to say this in a way that won’t make me regret it tomorrow.”

Her eyes burned instantly.

And then, with all the control and restraint that defined him, Aaron Hotchner finally said the thing he’d been starving himself of for months.

“I am in love with you, Emily.”

No grand declaration.

No dramatics.

Just truth.

Raw enough to shake him.

Prentiss stared at him for half a heartbeat before crossing the room quickly.

Hotch barely had time to inhale before her arms wrapped around him.

Tight.

Immediate.

Certain.

For one startled second he simply froze.

Then his hands came to her waist almost hesitantly, like he still couldn’t quite believe she would allow it.

Emily pulled back just enough to look at him.

“You absolute idiot,” she whispered, voice thick with emotion.

The corner of his mouth twitched faintly.

“I assume that means this isn’t unwelcome.”

She laughed once through tears she clearly hadn’t intended to shed.

“Aaron, I have been in love with you for so long it’s actually embarrassing.”

Something inside him cracked open completely at that.

Relief.

Pure, staggering relief.

His forehead rested against hers.

And for the first time in months—maybe years—Aaron Hotchner stopped fighting himself.

His voice dropped almost to a whisper.

“I thought keeping distance would protect you.”

Prentiss’s expression softened into something achingly tender.

“You don’t get to decide for me what’s worth the risk.”

God.

That nearly undid him entirely.

His hand rose carefully to her face, thumb brushing lightly along her cheek like something precious.

Something irreplaceable.

“I don’t know how to do this carelessly,” he admitted.

Emily smiled softly.

“Good,” she whispered. “Neither do I.”

And when he kissed her, finally, after months of restraint and denial and quiet longing, it was everything Aaron Hotchner was.

Controlled.

Reverent.

Careful enough to break your heart.

——

Sleep barely touched either of them.

Not because of awkwardness.

Not because of uncertainty.

But because after months—maybe years—of restraint, finally allowing themselves this changed the shape of the entire world.

Aaron lay awake, one arm around her where she rested against his chest in the dim hotel room. The city lights beyond the curtains painted faint gold across the walls, and for once his mind wasn’t cycling endlessly through reports, timelines, and procedural failures.

It kept circling back to her.

The warmth of her curled against him.

The steady rhythm of her breathing.

The fact that she was here.

Safe.

His.

The thought still startled him with its intensity.

Emily stirred slightly sometime after four in the morning, fingers tightening absently against his dress shirt where she’d fallen asleep half draped over him.

“You’re still awake,” she murmured sleepily.

Hotch’s hand moved slowly through her hair.

“Occupational hazard.”

A faint smile touched her lips without opening her eyes. “Liar.”

That almost made him laugh.

Almost.

Because she already knew him too well.

“You’re thinking about the case,” she whispered.

Partly.

But mostly he was thinking about how close he’d come to never saying any of it.

How easily fear and discipline could have cost him this.

His jaw tightened faintly at the memory of the unsub’s voice over the phone.

She’s prettier in person.

Emily must have felt the shift in him because she finally tilted her head up.

“Aaron.”

Just that.

Soft.

Grounding.

He exhaled quietly.

“We’re ending this tomorrow.”

Not a question.

A promise.

And Emily saw it then—that frightening stillness he got when his anger became too controlled to visibly show anymore.

She reached up, fingertips brushing his jaw gently.

“He doesn’t matter.”

Hotch looked down at her.

“He threatened you.”

“I know.”

“And you’re not angry?”

Emily considered that.

Then shrugged slightly against him. “I’m FBI. Unsubs threaten us all the time.”

“That doesn’t make it acceptable.”

The firmness in his voice made something warm bloom painfully in her chest.

Because Aaron Hotchner loved carefully.

Protectively.

With the full force of a man who did not give pieces of himself lightly.

Emily’s expression softened.

“No,” she agreed quietly. “It doesn’t.”

His forehead rested briefly against hers.

And for the first time in years, Aaron allowed himself one dangerous, selfish thought:

He wanted a future now.

One with her in it.

——

The unsub’s biggest mistake was revealed at 9:17 the next morning.

Reid caught the pattern first.

“He’s revisiting locations after police presence diminishes,” he said quickly, flipping through maps spread across the conference table. “The last three dump sites are all within four miles of each other.”

JJ leaned over his shoulder. “Comfort zone.”

Morgan snapped his fingers toward the map. “Warehouse district.”

Prentiss was already grabbing her jacket.

And Hotch—

Hotch felt something settle into sharp, terrifying focus.

Because suddenly the hunt no longer felt abstract.

This man had watched Emily.

Threatened her.

Imagined hurting her.

The rage from the night before came back instantly, colder and steadier than before.

“Let’s move,” Hotch ordered.

——

The warehouse smelled like mildew, rust, and old rainwater.

FBI vests swept through the building as local SWAT covered exits.

Hotch moved first through the dark corridor, weapon raised, every sense sharpened razor-thin.

Then—

Movement.

A door slammed somewhere deeper inside.

Morgan shouted, “FBI!”

Footsteps thundered.

The unsub bolted down the hallway.

Hotch saw him clearly for the first time.

Average height. Dark jacket. Panicked eyes.

Coward.

The unsub rounded a corner and nearly collided with Prentiss coming through the opposite entrance.

For half a second the man froze.

And then his gaze landed on her.

Recognition flashed instantly.

“There you are,” he breathed.

Hotch saw red.

Not metaphorically.

Something genuinely violent surged through him so fast it nearly stripped away thought altogether.

The unsub reached toward his waistband—

Hotch hit him before he could finish the motion.

Hard.

The force slammed the man into the concrete floor with a sickening crack.

The unsub cried out, struggling beneath him.

Hotch shoved his arm behind his back with brutal efficiency.

“Don’t move.”

The man twisted anyway.

Big mistake.

Hotch drove him back into the floor hard enough to stun him.

“Hotch,” Morgan warned from somewhere behind him.

But Hotch barely heard him.

Because all he could think about was this man watching Emily across the street.

Threatening her over the phone.

Wanting her afraid.

The unsub sneered despite the pain. “She’s not as pretty up close—”

Hotch’s hand closed around the back of his neck and slammed him back against the concrete.

“Careful,” Hotch said softly.

The quietness in his voice was infinitely more frightening than yelling would have been.

The unsub finally seemed to realize exactly who was arresting him.

And for the first time—

He looked afraid.

Good.

Hotch leaned closer, controlled fury radiating from every line of his body.

“You threatened one of my agents,” he said evenly. “You stalked her. You hunted other women because you thought fear made you powerful.”

The unsub swallowed hard.

And Hotch felt a grim, vicious satisfaction bloom in his chest.

Because this man wasn’t in control anymore.

Not here.

Not now.

Hotch hauled him upright and snapped cuffs onto his wrists with deliberate force.

“You’re under arrest for kidnapping, stalking, attempted murder, and approximately twelve other charges Reid will happily explain to you in detail.”

The unsub winced as Hotch shoved him toward Reid.

And then—

Almost involuntarily—

Hotch looked at Emily.

She stood several feet away, watching him carefully.

Not frightened.

Not disturbed.

She understood exactly what this had cost him.

What it meant.

Their eyes locked.

And slowly, subtly, Emily gave him the smallest nod.

Pride.

Understanding.

Affection.

It steadied him instantly.

Morgan and Reid took custody of the unsub while local officers moved in.

The adrenaline began to ebb from the room.

Hotch rolled his shoulders once, regaining control piece by piece.

Then Emily stepped beside him quietly.

“You tackled him harder than protocol probably recommends.”

Hotch glanced at her dryly. “Didn’t realize you were concerned about his wellbeing.”

That finally earned a real laugh from her.

Soft.

Warm.

God, he loved that sound.

Emily lowered her voice slightly. “You scared him.”

Hotch looked toward the unsub being dragged outside.

“Good.”

The single word carried enough cold satisfaction to make her stomach flip a little.

Because Aaron Hotchner was a profoundly controlled man.

Which meant the rare moments he allowed himself honesty—anger, love, devotion—carried incredible weight.

Emily stepped closer under the guise of discussing the case.

Close enough that only he could hear her.

“You know,” she murmured, “watching you arrest someone for threatening me was alarmingly attractive.”

For the first time all morning, genuine amusement flickered across his face.

Small.

Brief.

Dangerous.

“Emily.”

She smirked faintly. “Too soon?”

His eyes held hers for one long moment.

Then, quietly enough that no one else could hear:

“Come to my room tonight and I’ll answer that properly.”

And suddenly Emily understood something important.

Aaron Hotchner, once he finally stopped denying himself something he loved—

was capable of being devastating.