"Please, Shin… choose me. I'll be so good for you… I'll be your perfect, obedient wife… just say you'll marry me first."
Shin sat there, utterly dumbfounded, the weight of her words crashing over him like a tidal wave. His big sister—Emily—wanted to be his first wife?!
The request, the raw desperation in her voice, twisted something deep inside his chest until guilt clawed at his soul and his thoughts spiraled into pure chaos. He had made her cry. Her broken tone constricted his heart, her obsessive love, her craving, the way her crimson eyes burned with nothing but him—it was too much. Too overwhelming. His last shred of patience snapped.
"Big sister, no—Emily, you can't—"
Before the words could fully leave him, her soft cherry lips crashed down on his in a forceful, hungry kiss. Her tongue pushed past his, wrestling and claiming every corner of his mouth as if she owned it, drinking his saliva like it was the sweetest nectar she had ever tasted. She moaned into him, the sound vibrating through his bones, her body pressed so tight that the pink floral silk of her bra rubbed against his chest with every desperate breath.
A full minute passed before she finally pulled back, strings of saliva connecting their lips for a heartbeat longer. Her eyes were wild, glazed with lust and that terrifying, all-consuming love.
"I want you to know—"
Shin tried again, voice hoarse, "Emily, wait—"
But she silenced him once more with a deeper, filthier kiss. Her hands roamed greedily over his body—the lean, slightly muscular frame of a her little brother whom she had watched grow up and now claimed as hers alone.
Fingers traced every ridge of his abs, nails scraping lightly down his sides as her hips picked up speed, grinding harder, faster against the rigid length trapped beneath her. The thin silk of her panties was soaked, sliding slickly over him with every roll.
She kissed him again. And again. And again. A dozen searing, possessive kisses that left him dizzy and gasping, her tongue dancing with his each time like she was trying to devour his very soul. Her grinding grew frantic, hips rocking in tight, needy circles, the wet heat of her core pressing down relentlessly until—
Her entire body jolted violently in his lap.
Emily's movements suddenly froze, every muscle locking up as a hot, gushing wetness flooded across Shin's lap, soaking through his clothes like someone had spilled warm water right there. Her lips parted wide in a shattered cry.
"Shiiiin—!!"
Her voice rang out loud and raw in the quiet dawn room, fingers digging painfully into his shoulders as her toes curled tight against the chair legs. Her crimson eyes rolled back, lashes fluttering, back arching so hard her breasts nearly spilled out of that pretty pink bra while her thighs clamped around him like a vice.
Tremors ripped through her in wave after wave, her pussy clenching and pulsing against him through the ruined silk as she rode out the orgasm she had been chasing for days.
"Say it, Shin," she breathed against his lips, voice dropping into a needy whimper. "Tell your big sister you'll marry her first… that I'm the only one you need. Please… I've been going crazy keeping my distance, pretending I didn't want to pin you down and take what's mine. I can't wait anymore. I won't."
"Enough, Emily!!"
"Let Shin go right now!"
The sharp, familiar voice cut through the heavy air from Shin's right. He turned his head and saw Mira tied to another chair just a few feet away, still blinking groggily as the sedative wore off. Her wrists and ankles were bound with the same handcuff as his, and her usual gentle expression had twisted into pure horror.
They were still in Shin's room. A small rectangular box glowed faintly on the door, emitting a low hum that pressed down on their magic like a heavy blanket, suppressing it almost completely.
Shin finally managed to speak without her lips interrupting him off.
"What are you doing, big sister—no, Emily… You know I love you. I love you so much. I want to spend my whole life with you. I also want us to be happy together…"
His voice cracked with raw emotion.
"However, I also love Mira. She's mine. We're already married by souls—"
Emily didn't let him finish.
She shoved a warm, damp piece of cloth between his lips—her own soaked panties, still carrying her fresh scent, salty-sweet taste, and lingering body heat. The fabric filled his mouth, muffling any further words.
"I know you're married to her," Emily whispered, voice trembling with pain and obsession. "I know it was that ridiculous soulmate bond. I know you're connected spiritually… but I also know that because of it, you'll die at thirty. I'll lose you in just eighteen years. My love won't even be able to reach you after that. How could I live without you? I can't even imagine a future where you're gone!"
Tears welled in her crimson eyes, but they burned with fierce possessiveness.
"You want me to stop loving you? You're so mean… You're cruel! If you really love me, you won't stop me from doing this."
Mira stared in wide-eyed horror, her submissive nature warring with the desperate need to protect her husband. She could feel it clearly—Shin genuinely loved Emily. But Emily didn't want to be "only" loved; she wanted to be his wife, his first wife in every sense.
The curse that bound their souls now felt like poison to her too. It would take her life, and his too. Her own growing possessiveness screamed at her to attack, to tear Emily away… but the magic-suppressing box made that impossible, and she refused to do anything that might anger Shin.
So Mira could only plead, voice soft and trembling even as tears slipped down her cheeks.
"Please… Emily, don't hurt him. Don't do this…"
Emily ignored her completely.
She rose gracefully, then slowly slid her pink floral silk bra off her shoulders, letting her full, heavy breasts spill free—nipples already stiff with arousal. Without a word, she stepped over to Mira and stuffed the warm bra deep into the girl's mouth, gagging her gently but firmly. Mira's muffled protests died into soft, helpless whimpers.
Satisfied, Emily returned to Shin.
~~~
She crouched down in front of his bound legs, pressing her thighs together demurely in perfect seiza position, knees tucked neatly beneath her. Completely bare now except for the dampness still glistening on her inner thighs, she leaned forward and pressed her flushed cheek against his thigh, nuzzling lovingly.
Her crimson eyes looked up at him with that intoxicating mix of obssesive love and raw hunger, lips curved in a soft, dangerous smirk.
"You haven't had your first blowjob even once yet, have you, little brother?" she purred, voice dripping with possessive sweetness. "Let your big sister give you a first blowjob you'll never forget."
Mira's eyes widened in stunned panic. She shook her head frantically, muffled cries vibrating around the silk bra in her mouth, but she couldn't move, couldn't stop what was coming.
Shin's heart slammed against his ribs. 'No… wait—Emily, you can't—'
He tried to speak again, but the soaked panties stuffed in his mouth tasted of her—salty, sweet, musky with her recent orgasm—and only a muffled groan escaped.
All he could do was stare down at his beautiful, obsessed older sister as she reached forward with trembling but eager hands and pulled his pants and underwear down in one smooth motion.
His cock sprang free—already rock-hard, throbbing, the head glistening with pre-cum from her earlier grinding. Emily's eyes widened with pure hunger at the sight.
"So big… and all for me," she breathed, licking her lips slowly. "My little brother grew up so well…"
Mira, still tied to her chair with Emily's bra stuffed in her mouth, shook her head frantically, muffled cries of "Mmmph—! Stop…!" vibrating against the silk. Tears streamed down her cheeks, but she couldn't look away—part horror, part helpless jealousy as she watched her husband's cock twitch right in front of his big sister's face.
Emily ignored Mira completely.
She leaned in, pressing her soft cheek against the thick shaft first, nuzzling it lovingly like it was the most precious thing in the world. Her hot breath ghosted over the sensitive skin, making Shin's hips jerk involuntarily against the ropes.
Then she parted her cherry lips and dragged her warm, wet tongue slowly from the base all the way up to the swollen head, tracing the thick vein underneath. A low, needy moan escaped her throat as she tasted him.
"Mmm… you taste so good, Shin…"
Shin's head fell back against the chair, a strangled groan caught behind the gag.
'Holy shit… her tongue… it's so soft… so hot…'
Emily didn't rush. She was savoring every second. She kissed the tip tenderly, then opened her mouth wider and took the head inside, lips stretching around his girth. Her tongue swirled around the sensitive crown, sucking gently while her hand wrapped around the base, stroking slowly.
Emily hummed around his length, the vibration shooting straight to his balls. She took him even deeper, relaxing her throat until her nose pressed against his pelvis and his cock slid all the way into her tight, convulsing throat. She held him there for long seconds, eyes watering but shining with devotion, before pulling back with a wet gasp, strings of saliva connecting her lips to his glistening shaft.
"I love you… I love you so much," she whispered hoarsely, voice thick with saliva and need, before diving back down.
She bobbed her head deeper, taking more of him with every downward motion until half his cock was buried in the wet heat of her mouth. Saliva dripped down her chin as she sucked harder, hollowing her cheeks, eyes never leaving his—crimson gaze filled with obsessive love and lust.
Shin's mind was reeling, a chaotic whirlwind of guilt, love, and overwhelming arousal.
Emily kept her eye contact the entire time, crimson gaze burning with lust and possession.
"Cum for me, Shin… cum down your big sister's throat…" she gasped between strokes, voice hoarse and broken. "Fill my mouth… mark me as yours… I want your first load so bad… please… give it to me!"
Mira's muffled sobs grew louder, her body trembling as she was forced to watch her husband's cock disappear again and again into Emily's greedy throat.
Shin could feel it building fast—his balls tightening, cock swelling even thicker in her mouth. The pressure was unbearable.
Emily sensed it instantly. She slammed her mouth all the way down one final time, burying him completely in her tight, convulsing throat and held him there, humming loudly, swallowing over and over as if trying to pull his orgasm straight out of him.
Her eyes rolled back slightly in pure bliss as the first powerful spurt erupted down her throat.
"Mmmph—! Mmmph—!" Her muffled moans of satisfaction continued as she kept sucking through his orgasm, drawing it out, making sure she drained him completely. Her cheeks hollowed, tongue still swirling, refusing to let a single drop escape.
She looked up at him, breathing hard, lips shiny and puffy, a few stray drops of his cum still clinging to the corner of her mouth. Her crimson eyes were hazy with lust and overwhelming love as she licked her lips slowly, savoring the taste.
A soft, possessive smile curved her lips.
"…All mine," she whispered hoarsely, voice raw from deepthroating him. "Your first orgasm… belongs to your big sister forever."
She leaned forward and placed one last gentle, adoring kiss on the sensitive head of his cock, then nuzzled her cheek against his thigh again, completely naked, breasts still heaving, her own arousal dripping down her inner thighs.
Mira sat frozen in her chair, tears still falling, completely stunned by what she had just witnessed.
Emily's gaze flicked briefly to Mira, then back to Shin, her smirk deepening with dark, yandere satisfaction.
~~~
"Now… are you ready to marry me, Shin? Or should I keep going until you can't think of anyone else?"
She stayed crouched between his legs, lips hovering teasingly close to his softening cock, waiting for his answer while the room still echoed with the wet sounds of what she had just done.
Emily glanced at Mira, then at Shin, and back to Mira again. Her expression turned serious as she spoke calmly,
"I'm not cruel enough to hurt you or destroy your happiness. So I'll make this simple — perform the Soulmate ritual between me and Shin right now."
Her voice was firm, leaving no room for argument, while her hand gently stroked Shin's thigh possessively.