The office was quiet, the hum of the air conditioner the only sound breaking the silence. It was late, much later than I should have been here, but the project deadline loomed like a storm cloud over my desk. I leaned back in my chair, stretching my arms above my head, and glanced at the clock on the wall. Midnight. I sighed, rubbing my eyes with the heels of my hands.

"Still here, big brother?"

I jumped, nearly knocking over my coffee cup. My sister, Emily, stood in the doorway, her dark hair cascading over her shoulders, a mischievous grin playing on her lips. She wore a tight red dress that hugged her curves in all the right places, and I couldn't help but notice how her heels clicked against the tile floor as she walked in.

"Emily? What are you doing here?" I asked, trying to keep my voice steady.

She shrugged, sauntering over to my desk. "Couldn't sleep. Thought I'd come see what my favorite brother was up to."

"It's one in the morning," I pointed out, though my heart raced at her proximity.

She leaned against the edge of my desk, crossing her legs provocatively. "Exactly. Everyone else is asleep. No one will know."

Her words hung in the air, charged with an unspoken invitation. I swallowed hard, my eyes drifting down to her cleavage, then quickly back up to her face. She knew exactly what she was doing to me, and she reveled in it.

"You shouldn't be here, Em," I said, though my resolve was crumbling like sand underfoot.

She laughed softly, a sound that sent shivers down my spine. "Why not? We're adults, aren't we? Besides, you look like you could use a break."

Before I could respond, she reached out, her fingers brushing against my cheek. The touch was electric, sending a jolt through me that made my breath hitch. I closed my eyes, savoring the sensation, even as my mind screamed at me to stop this madness.

"Open your eyes, Matt," she whispered, her voice low and sultry.

I did as she commanded, meeting her gaze. Her blue eyes sparkled with something dangerous, something that made my heart pound in my chest. She leaned in closer, her breath warm against my skin.

"What do you want, Emily?" I asked, my voice barely above a whisper.

She smiled, a slow, seductive smile that made my stomach flip. "I think you already know the answer to that."

Her hand slid down from my cheek to my neck, her thumb tracing the line of my jaw. I felt myself leaning into her touch, my body betraying me. She was too close, too tempting, and I was too weak to resist.

"Tell me," she murmured, her lips inches from mine. "Tell me what you want."

I wanted to push her away, to tell her this was wrong, but the words wouldn't come. Instead, I found myself saying, "I want you."

Her smile widened, and she pressed her lips to mine in a kiss that was both soft and demanding. I kissed her back, my hands finding their way to her waist, pulling her closer. The taste of her, the feel of her body against mine, it was intoxicating.

"Good boy," she purred when we finally broke apart, her fingers trailing down my chest. "Now, let's see if you can handle what comes next."

She stepped back, giving me a once-over that made my blood heat. Then, without another word, she turned and walked towards the small office couch, her hips swaying seductively. I watched her go, my mind reeling, my body aching with need.

This was insane. This was wrong. But as I followed her, my heart pounding in my ears, I couldn't bring myself to care. All I knew was that I wanted her, needed her, more than I had ever wanted anything in my life.

And tonight, I was going to have her.

Emily lay back on the couch, her red dress riding up just enough to tease but not reveal. She watched me with those piercing blue eyes, a knowing smile playing on her lips. I could feel the heat radiating off her, and my heart pounded in my chest like a drumbeat urging me forward.

"Take off your tie," she commanded softly, her voice a silken thread winding around my senses.

I hesitated for a fraction of a second, then reached up and unknotted the tie, letting it drop to the floor. Her gaze followed its path down, and a low hum of satisfaction escaped her throat.

"Now take off your shirt," she continued, her fingers tracing idle patterns on the arm of the couch.

My hands moved almost of their own accord, fumbling with the buttons as I stripped away the fabric. Emily's eyes devoured every inch of skin revealed, her pupils dilating with desire. Once the shirt was discarded, I stood before her, bare-chested and trembling with anticipation.

"Come here," she beckoned, patting the space beside her.

I obeyed, sliding onto the couch next to her, the leather cool against my heated skin. She reached out, her fingers ghosting over my chest, sending shivers down my spine. I gasped, more from surprise than pain, as her nails raked lightly across my nipple.

"You like that?" she purred, her breath hot against my ear.

"God, yes," I breathed, my body arching into her touch.

She rewarded me with another pass of her nails, this time scraping more forcefully. I bit back a moan, my body thrumming with need. Emily pulled away slightly, her eyes dark with lust.

"Now, undress me," she ordered, her voice thick with欲望.

My hands trembled as they reached for the zipper of her dress, pulling it slowly down until it pooled at her waist. The sight of her creamy thighs exposed made my mouth go dry. I pushed the fabric further, exposing the lace of her garter belt, each movement an exquisite torture.

Finally, the last of the dress fell away, revealing her completely. Her body, perfectly sculpted and glowing under the soft office lights, sent my pulse skyrocketing. I stared, my breath hitching as I took in the view.

"Like what you see?" she teased, running a finger along the edge of her panties.

"More than anything," I admitted, my voice rough with need.

She shifted closer, her legs parting slightly as she guided my hand to her inner thigh. My fingers brushed against the silky fabric of her panties, feeling the heat of her through the thin material. I marveled at how such a simple touch could ignite such a fierce fire within me.

"Make me come," she whispered, her voice strained with desire. "Show me how much you want me."

Unable to resist any longer, I slipped my thumb under the edge of her panties, finding her slick and ready. Emily groaned, her head falling back as I began to stroke her, my movements deliberate and slow. Her hips bucked into my hand, chasing the friction she craved.

"Harder," she demanded, her voice breaking.

I complied, increasing the pressure and speed of my strokes. Her moans grew louder, her body quivering with each passing second. I watched in awe as her orgasm built, her muscles tightening in anticipation. With one final, desperate thrust of her hips, she came undone, her body shuddering violently as waves of pleasure crashed over her.

For several long moments, she lay there, silent and panting, her chest heaving with every ragged breath. Then, gradually, her eyes fluttered open, meeting mine once more. There was a look of triumph in them, mingled with something darker, something more insidious.

"Your turn," she murmured, her voice dripping with satisfaction.

Before I could respond, she had maneuvered herself between my legs, her fingers deftly undoing the button and zipper of my trousers. She fished out my already straining erection, giving it a slow, teasing stroke that made me hiss in pleasure.

"You're so hard," she observed, her tone clinical yet undeniably aroused. "Does it hurt?"

"Only if you don't do anything about it," I ground out, my control fraying by the second.

With a knowing grin, she leaned down, her lips curling around the head of my cock. A jolt of electricity shot through my body at the contact, obliterating the last threads of my self-restraint. She swallowed me whole, her mouth moving with expert precision, drawing wave after wave of ecstasy from deep within me.

The sensation was too much, unbearable yet intoxicating. I clutched at the back of her head, trying to guide her faster, deeper. But she was in control now, savoring every bit of my torment. Her tongue danced wickedly, twirling around the sensitive underside of my shaft as she hollowed out her cheeks, creating a suction that left my mind spinning.

"Emily...please..." I begged, though even I wasn't sure what I was pleading for.

Laughing softly around my shaft, she complied, speeding up her pace until I thought I might explode. Stars flashed behind my eyes as my climax built, cresting higher and higher with no end in sight. And then—impact.

I spilled into her mouth, my release a violent torrent that emptied everything within me. She drank it down greedily, never pausing in her rhythm, milking me for every last drop until there was nothing left.

When she finally pulled away, a small trail of cum clung to the corner of her mouth, glinting wickedly in the dim light. Still shaking from the intensity of my orgasm, I collapsed back onto the couch cushions, my breath ragged and shallow.

"Was that good for you?" she asked innocently, licking her lips clean.

I nodded mutely, unable to form coherent words as the aftermath settled over me. Emily merely smiled, tucking herself back into her dress with languid grace.

"We should do this again sometime," she mused casually, as though we were discussing dinner plans rather than our forbidden tryst.

As the implications of her words sank in, I realized that tonight was just the beginning.