Test her trigger

Later that evening, you find her in her room scrolling on her phone. Upon seeing you in the hallway, she throws you the occasional **** glare.

You look at her, and say, calmly, "Hey, sis? Time to kneel."

The change is instantaneous and horrifyingly smooth. Her phone clatters to the floor. The anger melts from her face, replaced by a serene, empty smile. Without a word, she gracefully sinks to her knees on the carpet, her hands folding in her lap, her eyes glazing over with a focused, eager devotion. She looks up at you, waiting for her purpose to begin. Mom and Dad downstairs won't suspect a thing. You have the perfect, secret cocksucker living under your own roof. A bitch permanently put in her place.

The sight of your sister on her knees sends a jolt of electricity through your system, darker and more potent than anything you felt with Dr. Carter. This wasn't a professional detachment; this was conquest. You step closer, watching her eyes track your movement with that unsettling, glassy devotion. The air in the room feels heavy, charged with your own corrupt influence. You run a thumb over her lower lip, smearing the red gloss, and she leans into the touch, a soft, contented hum vibrating in her throat. The bitch who screamed at you hours ago is gone, replaced by a vessel eager to be filled.

"Sister or not," you mutter, more to yourself than her, “I like you so much better this way."

Her only response is a slow, blinkless stare. She doesn't bristle at the insult; she doesn't seem to hear it as an insult at all. You have rewritten her reality, turning degradation into devotion. You undo your belt, the metallic clink sounding like a gunshot in the quiet room, yet she doesn't flinch. Instead, she leans forward, her hands moving to rest on your thighs, her grip firm yet reverent. She looks up at you, her breathing shallow and synchronized with yours, waiting for permission to fulfill her new purpose.

"Go ahead," you murmur, lacing your fingers into her hair, guiding her forward. "Do what you're good for."

She opens her mouth without hesitation, her eyes fluttering shut as she takes you in. The sensation is electric. She is enthusiastic, sloppy even, driven by an artificial hunger that overrides her usual ego. Every flick of her tongue, every hum of submission sends a thrill through you, reinforcing the dark realization that you have completely dismantled the person she was and rebuilt her into a tool for your pleasure. The world has narrowed down to a singular, blinding point of focus. The anger, the stress, the biting insults that usually sit on the tip of her tongue have all evaporated, replaced by a serene, heavy fog. Kneeling here doesn't feel wrong; it feels inevitable, like gravity pulling her down to where she belongs. The taste of you fills her senses, musky and dominant, and she finds herself moaning around your shaft, the sound vibrating through her own chest. A distant, echoey part of her mind screams that this is her brother, that this is repulsive, but that voice is drowned out by the overwhelming need to please. She wants to be good. She wants to be useful. Her hands massage your thighs, her nails digging in slightly as she takes you deeper, fighting her gag reflex not out of fear, but out of a **** desire to take every inch. When you tighten your grip in her hair, a spike of arousal shoots through her, liquid heat pooling between her legs.

You watch her head bob, her messy hair swaying with the rhythm of her movements, and feel a profound sense of power. It’s a heady rush, far better than the sterile efficiency of the hospital. Here, there are emotions to at play, a personality you dislike. You look down at her - the girl who made your life hell for years - and realize she looks beautiful like this. Submissive. Silent. Useful. You hold her head steady, feeling the tight warmth of her throat as you take control of the pace, thrusting deeper as she gags slightly but refuses to pull away. The old her would have bitten you. The new her just worships you. And as you feel the pressure building, you know that when this is over, she won't remember a second of it. You have effectively turned your worst enemy into your favorite toy.

The pressure in your groin builds to a fever pitch. You tighten your grip in her hair, holding her head in place as you reach the edge, looking down at the sister who used to belittle you, now gagging on your cock with tears of effort streaming down her cheeks. With a guttural groan, you cum, your hips bucking forward as you empty yourself down her throat. She takes it all, her throat working frantically to swallow every drop, her body trembling with what feels like gratitude, moaning softly around you as if she’s receiving a reward rather than a degradation.

For a long moment, the only sound in the room is your heavy breathing and the wet, rhythmic sounds of her cleaning you with her tongue, ensuring she hasn't missed a single drop. The sight is surreal - the smudged red lipstick, the glazed eyes, the absolute lack of defiance. It’s a level of control you didn't know you craved until now. As the waves of pleasure subside, leaving a cold, calculating clarity in their wake, you slowly pull back, letting her slide off you. She slumps back on her heels, looking up at you with that same vacant, adoring expression, wiping her mouth with the back of her hand in a daze. You look down at her, the master of her mind. The power is intoxicating, a dark mirror to the relief Dr. Carter provided, but this is sharper, more personal. You tuck yourself away and refasten your belt, the metal click again signaling the end of the session.

"Clean yourself up," you order softly. "And masturbate in the shower while you're at it. You're soaking wet down there."

You step back, watching as the command takes root in her pliant mind. You lean against her doorframe, watching the girl who tormented you for years sit quietly in the trance, waiting for the final word that resets her world, leaving you the only one who holds the key. You step out into the hallway, the soft click of the door sealing her away from reality. The house is quiet, the muffled sound of the TV drifting up from the living room where your parents sit, oblivious to the corruption that just transpired feet away. You stand there for a moment, listening, before calling out through the wood panel, your voice calm and final.

"Wake up."