The room smelled of rain and old wood as Marcus stood over his sister Elena, the silver pendant pulsing faintly in his palm. At twenty-four she was all long limbs and defiant eyes, but the device he had stolen from the lab had already begun its work. Her pupils dilated slowly, the fight draining from her like water through a sieve.
“On your knees,” he said, voice low and edged with command.
Elena’s breath hitched. Her body obeyed before her mind caught up, knees folding to the carpet with a soft thud.

The pendant’s glow reflected in her irises, turning them glassy. Marcus felt the power thrum through him, dark and absolute, the same force that had already bent their mother earlier that week. Elena’s fingers trembled as they reached for his belt, but the hesitation was no longer hers; it belonged to the last shred of resistance the pendant had not yet crushed.
He watched her lips part, watched the conflict ripple across her face and then vanish. “Good girl,” he murmured, and the praise sank into her like a brand. Her mouth closed around him, hot and wet, and the power exchange sharpened into something electric. Every flick of her tongue felt stolen, every moan forced from her throat by the invisible leash wrapped around her will. Marcus’s hand settled on the back of her head, guiding her deeper, and the wet sounds filled the quiet room like a confession.
Elena’s hips rocked unconsciously against nothing, her body betraying her with slick need. The pendant had rewritten her desires; what had once been forbidden now pulsed as urgent craving. Marcus pulled her up, spun her to face the bed, and bent her over the edge. He stripped her slowly, savoring the way her skin flushed under his gaze, the way her thighs parted without a word from him. When he pushed inside her, the tight heat drew a groan from his chest. Elena’s fingers clutched the sheets, knuckles white, but her back arched to take him deeper.
“Tell me you want it,” he ordered, voice rough.
“I… want it,” she gasped, the words dragged out of her. “I want my brother to fuck me.”
The admission cracked something open between them. Marcus drove harder, each thrust a claim, the pendant swinging between them like a metronome of control. He reached around to circle her clit, and Elena shattered with a broken cry, her walls pulsing around him. He followed seconds later, spilling deep, the intensity of the release sharpened by the knowledge that none of it was her choice anymore.
Later, when the pendant’s glow faded and Elena lay trembling in his arms, Marcus felt the dark satisfaction settle in his bones. She looked up at him with eyes still hazy, lips swollen, and whispered the words the device had planted: “Again.”
The power exchange had only begun.