My Sister Stole My Mate, And I Let Her

Chapter 510: Chapter 510 SOMETHING OVERRIDDEN

KIERAN’S POV

I didn’t expect to feel hesitation inside Ashar.

Not in the middle of a kill-space where instinct should have been clean, absolute, unquestioning.

Lucian came at me like a storm given shape—black fur, massive frame, silver-ringed eyes that reflected something fractured, something overridden.

This was not like our sparring match from before the LST.

That fight had been brutal, personal, driven by pride and resentment, yet still bound by control and discipline, even in aggression.

This was different.

This was intent without ownership.

A body moving with the full conviction of murder, while something else pulled the strings just out of sight.

Unfortunately for him, his target was the one untouchable I couldn’t let him have.

So Ashar met him head-on anyway.

The impact blasted a shockwave through the ridge, scattering loose stone and crushing brittle grass beneath us.

Pain bloomed through my forelimbs on contact, but it was the kind of pain that only confirmed the opponent before me was dangerous.

That meant I had to be twice as dangerous.

Lucian did not hesitate after the impact. He did not recoil, reassess, or recalibrate the way a thinking fighter would.

He simply pressed forward again, no recognition or control or discipline—only hunger.

A hollow, artificial hunger that did not belong to him.

I couldn’t let him devour everything I loved. I had to end this.

‘Kieran, don’t kill him! He’s not himself.’

Sera’s voice cut through the bond like a tremor of light breaking through storm clouds.

It did not weaken me, but it fractured the edge of instinct just enough to make me feel the weight of what I was about to do.

Lucian surged again.

Ashar braced.

Claws met claws. Muscle met muscle. The ridge beneath us trembled with each exchange, earth cracking outward in spiderweb fractures.

I drove him back once, then twice, but no satisfaction followed. Only resistance. Only the awareness that every time I gained ground, I had to remind myself not to end him.

Because, despite everything that had happened, everything he had done, Sera still cared about him. If I killed him, I would feel her anguish as surely as if it were my own.

Because somewhere, beneath whatever had taken hold of him, Lucian Reed still existed.

‘Fight it,’ I growled inside my mind. ‘Fight it, damn you.’

Lucian answered with another charge.

His eyes flickered for a fraction of a second as we collided again, and in that sliver, I almost saw him.

Then it was gone.

Ashar forced him back with a violent shove and circled, low and tense, hunting for a pattern, a rhythm, something I could exploit without killing him.

But there was none.

There was only escalation.

Behind me, I felt Sera move.

‘Sera,’ I warned through our newly-formed mind link, shifting half my attention toward her even as I kept Lucian in my peripheral awareness. ‘Stay back.’

‘I can’t,’ she replied. ‘Maybe...maybe I can help.’

Her voice was steadier now than it had been earlier, sharpened by something deeper than fear.

When I glanced back briefly, I saw it—the faint, almost invisible shimmer of her psychic energy unfurling around her like threads of light stretched thin.

‘I can feel him,’ she said softly, more to herself than to me. ‘He’s still there. He’s just...buried.’

Lucian lunged again at that exact moment.

Ashar moved to intercept—

But another force blasted into the edge of perception.

Zara.

She arrived like a fracture in the flow of the fight, her psychic presence snapping into place with unnerving clarity.

It was not the same as Sera’s. Sera’s power felt like resonance, like something trying to restore balance through connection.

Zara’s felt like domination without noise.

The air between her and Sera warped.

I felt it in Ashar’s bones—the subtle resistance of two opposing forces grinding against each other without physical contact.

“Stay away from him!” Zara snapped, her voice trembling—with fear or anger, I couldn’t quite tell.

“I’m trying to help!” Sera shot back.

Sera’s psychic threads tightened, reaching for Lucian again.

Zara severed them mid-extension.

The backlash rippled through Sera, and I felt it through the bond like a sudden drop in pressure that might have made lesser ears bleed.

‘Sera!’ I snarled, shifting instinctively toward her.

Lucian used that opening.

He rammed Ashar’s flank with enough force to knock me off balance, claws raking through fur and muscle as we crashed sideways into fractured stone.

Pain flared hot and immediate, but it was secondary to the instinctive awareness that Sera was now exposed between us.

Zara stepped forward fully, her gaze solely fixed on Lucian.

“Enough!” she said sharply, though her voice did not carry sound so much as pressure. “You’re destabilizing him further.”

Sera straightened, breathing uneven but focused.

“You’re keeping him like this,” she replied, her psychic aura expanding again in response. “I can bring him back.”

“That’s not your place,” Zara said. “I’m his mate. If anyone will reach him, it’ll be me.”

The air between them tightened.

It was not a physical clash, but the effect was identical. The ridge itself seemed to groan under the strain of competing psychic and physical forces.

Lucian’s wolf roared, the sound tearing through everything.

Ashar pivoted back toward him just as he launched again, but this time something changed.

His attack trajectory veered mid-motion, not by choice, but by interruption. Like a hand clenched somewhere inside him and yanked too hard.

I charged to intercept him, but my focus fractured between him and Sera.

And that was my mistake.

A surge of Zara’s power rippled outward—cold, controlled, precise—and Sera was forced to brace against it.

Her psychic threads faltered under the strain, momentarily destabilized.

Lucian twisted mid-fall.

And Zara moved.

She threw herself between him and me.

It happened too fast for instinct to adjust.

Ashar’s strike was meant to be a fraction of redirected force that should have passed harmlessly into space. It didn’t land as intended.

It landed on Zara instead.

She was thrown backward, sliding across broken ground, her breath leaving her in a sharp, pained gasp.

For the first time in the fight, something inside Lucian shifted.

It was subtle, almost imperceptible—the fracture in the override.

His eyes flickered, silver rings tightening around navy depths as if something deep inside him recoiled at the sight of Zara being hurt.

She tried to rise, one hand pressing into the ground, but she winced and fell back again.

Sera stepped forward, a hand out. “Zara—”

“Don’t!” Zara snapped, but it lacked force now. “Stay away from me.”

And Lucian...

Lucian was no longer moving. His massive form stood rigid, claws dug into the earth, head slightly lowered.

Ashar didn’t move either.

Because I could feel it too.

The pressure in Lucian was shifting.

The command that had been forcing him forward—breaking, bending, overriding—was destabilizing.

Zara’s injury must have disrupted whatever was controlling him.

Lucian let out a sound that was not quite a growl and not quite a gasp.

And then, like a bolt of lightning, he shot forward.

Toward Sera.

Too fast for me to react, his massive body slammed into her, and she fell on her back while Lucian towered over her, his claws hovering near her neck.

Ashar tensed instantly, preparing to shove him off her. Anguish be damned, I was going to put him down once and for all.

But Sera’s frantic voice in my mind halted me immediately.

‘Wait!’

I crouched low, still tense. ‘Sera...’

‘Just...wait.’

I froze, not taking my eyes off the wolf towering over my mate, ready to lunge if he so much as twitched a muscle.

But...he’d frozen again.

Sera, too, was still, her eyes locked on him, and I could feel the subtle waves of her psychic energy like a charge in the air.

Time stretched thin across the ridge, suspended between instinct and something far more dangerous.

Lucian’s breathing was ragged. His body trembled, as if two commands were colliding inside him and neither could fully win.

Kill.

Protect.

Kill.

Protect.

His claws twitched a fraction closer.

I prepared to launch.

Then—

Something broke.

I saw it in his eyes before I saw it in his movement.

The silver ring tightened, then fractured, like ice cracking under heat.

His head jerked sharply, as if he had been struck from the inside.

And then he pulled back.

The claws that had been inches from Sera’s throat veered away at the last possible second, carving into the ground beside her instead.

Dirt and stone exploded outward from the impact, but she was untouched.

Silence slammed into the ridge like a physical force.

Lucian’s wolf remained frozen over Sera for one breath.

Then he collapsed forward, not fully falling, but lowering his head until it hovered just above the ground, his entire body shaking as if he had just fought his way through six feet of earth.

Sera exhaled shakily as she turned her head towards him.

“Lucian,” she whispered.

The name barely had time to leave her lips before the air around him fractured.

His massive wolf form shuddered violently as if something inside his body had snapped free from an anchor it had been clinging to.

A sound tore out of him that was neither growl nor breath—something closer to a human’s gasp.

Bone cracked. Fur receded in waves, dissolving back beneath skin as the massive frame collapsed inward on itself.

The transformation was not controlled. It was not graceful. It was a forced undoing, like something that had been stretched too far finally being yanked back into its original shape.

Ashar tensed, ready to strike if the tide turned again.

And then—

Lucian was human again.

Naked. Kneeling in the shattered earth like something carved out of exhaustion, head bowed low, his damp hair clinging to his face. His chest rose and fell in sharp, uneven breaths, every inhale trembling as if it hurt.

“Lucian...” Sera repeated, softer this time. Uncertain.

His fingers dug into the dirt beneath him, shaking as if they didn’t fully belong to him yet.

He lifted his head slowly, and when his eyes met Sera’s, his breath hitched.

“I...” His voice cracked, hoarse, wrecked. “I didn’t—”

For a second, it looked like he might collapse again just from the weight of what he was seeing. Of what he’d done.

Then his gaze flickered downward—to Zara.

A sharper inhale.

Something in his expression shifted—pain, recognition, something unsteady and heartbreakingly human.

“That...wasn’t me,” he whispered, almost to himself.

As if he wasn’t entirely sure that was true.