My Brother, My Ruin

Chapter 1: Stolen Heat in the Hallway

Cassandra

Fuck! I still remember the day everything started.

I was twenty, freshly accepted to Riverside University, and pissed that my life was getting rearranged because Mom finally found “the one.”

**Two Years Ago**

“Grab that box, Cassie,” Mom called, waving at me with a bright smile I hadn’t seen in years. “Alexander should be inside helping his dad.”

I bent down to lift a heavy box of my books, my shorts riding up my thighs. That’s when he stepped out the front door.

Alexander Gray.

He was taller than I expected, maybe six feet, with broad shoulders and dark hair that looked like he’d just run his fingers through it. His t-shirt stretched across his chest, and sweat glistened on his arms from carrying furniture. Our eyes met across the yard, and something hit me hard in the stomach, like my body recognized him before my brain could catch up.

“Hey,” he said, walking straight over. His voice was deep, easy. “You must be Cassandra. I’m Alexander. Or Alex, whatever.” He reached for the box in my hands, his fingers brushing mine. The touch lasted a second too long, and electricity shot up my arm.

“Thanks,” I muttered, letting him take it, but I couldn’t stop staring at his face. He had a sharp jaw, full lips, and eyes that looked like they saw way too much. “This is weird, right? Our parents getting married so fast.”

He grinned, that crooked smile that would later haunt my dreams. “Yeah. But it could be worse. At least you’re hot.” He said it casually, like it was nothing, but his gaze dropped to my legs for a split second before snapping back up.

My cheeks burned. “You’re not supposed to say that. We’re about to be family.”

“Step-family,” he corrected, lifting the box easily onto one shoulder. “Doesn’t count the same.” He started walking toward the house, and I followed, my heart beating faster than it should from just carrying stuff.

Inside, the place smelled like fresh paint and new beginnings.

Now his dad, my new stepdad, was in the kitchen unpacking plates with Mom. They were laughing too loudly, all touchy and happy. Alexander set the box down in what would be my room upstairs, then turned to face me.

“Need help unpacking?” he asked, leaning against the doorframe. His eyes traced over me again, slower this time, from my messy ponytail down to my bare feet in flip-flops.

I crossed my arms, suddenly aware of how thin my tank top was. “I can handle it. But thanks.”

He didn’t leave. Instead, he stepped closer, close enough that I caught his scent, soap and something warm like sun on skin. “You going to Riverside too? Same campus as me.”

“Yeah. Business major.” My voice came out softer than I wanted.

“Cool. I’ll show you around to make sure my new stepsister doesn’t get lost.” The way he said “stepsister” sent a forbidden thrill through me. It was wrong, but my body didn’t care. Heat pooled low in my belly as he reached out and tucked a loose strand of hair behind my ear. His fingers lingered on my cheek.

“Alexander…” I started, but didn’t know what to say. The air between us felt thick.

He leaned in a little. “Call me Alex. And Cassandra? This is gonna be interesting.” His breath brushed my lips for half a second before he pulled back with that same grin.

Mom’s voice floated up the stairs. “Kids? Pizza’s here!”

He winked and headed down, leaving me standing there with shaky legs and a racing pulse. I touched my cheek where his fingers had been.

That was the first day. The day I knew I was screwed. Because even as I told myself it was nothing, just moving-in nerves, I already wanted more, his hands on me again, and things a stepsister should never want from her stepbrother.

And from the look he gave me over pizza that night, with our parents chatting away, he felt it too.

**Recent day**

“Alexander, get your hands off me right now,” I whispered sharply, my back pressed against the upstairs hallway wall. My heart pounded so hard I could feel it in my throat.

He didn’t move. Instead, his body leaned closer, trapping me there in the dim light from the bathroom nightlight. “Cassandra, you think I can just ignore this anymore? We’ve been dancing around it for two damn years.” His voice came out low and rough, the kind that sent unwanted shivers down my spine.

I shoved at his chest, but my fingers lingered a second too long on the hard muscle under his t-shirt. “This is crazy. Our parents are downstairs right now, unpacking groceries. What if your dad walks up here?”

Alexander’s breath brushed my ear. “Then we’d better be quiet, sis.” He said that last word like a challenge, like he knew exactly how wrong it sounded and didn’t care. His hand slid down my side, gripping my hip through my thin summer dress.

“Stop calling me that,” I hissed, but my voice cracked.

God, why did his touch feel so good? We had come home for the weekend from Riverside University because our parents wanted a family dinner to celebrate the start of the new semester. One minute we were laughing in the kitchen like normal stepsiblings. Next, Alexander had pulled me aside while Mom and his dad carried bags inside.

He smirked, that lazy grin that always made girls on campus stare. Alexander Gray stood six feet tall, with broad shoulders from playing intramural basketball, dark messy hair that fell into his eyes, and a jaw that looked carved from stone. “You don’t really want me to stop, Cassandra. I see how you look at me when Brady’s around.”

My cheeks burned. “Brady? This has nothing to do with your friend.”

“Doesn’t it?” Alexander’s fingers traced the hem of my dress, inching higher on my thigh. “Every time he texts you or tries to sit next to you in the cafeteria, you glance at me first. Like you’re checking if I’m watching.”

I swallowed hard. Brady Collins was charming, always cracking jokes with his easy smile and those bright blue eyes. He had asked me out twice already this semester, but I turned him down both times, because of this. Because of the secret pull toward my own stepbrother.

“Brady’s nice,” I said, trying to sound normal. My breath hitched as Alexander’s hand moved under my dress. “He’s your best friend. He’d lose his mind if he knew what you’re doing right now.”

Alexander’s eyes locked on mine. “Then don’t tell him. This is between us.” His fingers brushed the edge of my panties, and I gasped. “Fuck, Cassandra. You’re already wet.”

“Alexander…” I meant it as a warning, but it came out breathy. I grabbed his wrist, but instead of pulling him away, I held him there. The house smelled like Mom’s pasta sauce drifting up from downstairs, and his dad laughing at something.

He pressed his forehead to mine. “Tell me you don’t want this and I’ll walk away. But don’t lie to me. Not after all those nights at the dorms where we’d stay up talking and I’d catch you staring at my mouth.”

I bit my lip. Memories flooded in. Late study sessions where our knees touched under the table. The times we bumped into each other in our shared apartment. The time we shared a pizza in his car after a game and his hand brushed mine. “This is wrong. We’re family.”

“Step family,” he corrected, his voice dropping even lower. “And I don’t give a shit.”

His lips crashed into mine before I could argue again. The kiss was hungry, and desperate. I moaned into his mouth, and he swallowed the sound. His tongue teased mine, and I kissed him back harder than I should have. My hands fisted in his shirt, pulling him closer.

“God, you taste good,” he murmured against my lips. “Been wanting to do that since last Christmas when you wore that red sweater.”

I pulled back just enough to breathe. “You’re such an idiot. What if someone hears us?” But my body betrayed me. I arched into him as his hand cupped me through my panties, rubbing slow circles.

“Then be quiet, baby.” He slipped one finger under the fabric, finding my slick heat. “So fucking wet for me already.”

I gripped his shoulders, nails digging in. “Alexander… we can’t… oh fuck.” His finger slid inside me, and my knees buckled. He held me up with his body, pressing me harder against the wall.

“Shh,” he whispered, kissing my neck. “You like that? Tell me.”

“Yes,” I admitted, voice shaking. “Don’t stop.”

He added a second finger, pumping them slowly while his thumb circled my clit. Pleasure built fast, making my thighs tremble. I buried my face in his neck to muffle my moans. His scent filled my nose, clean soap and something masculine that was all him.

Downstairs, Mom called out. “Kids? Dinner in ten minutes!”

Alexander froze for a second, then chuckled softly. “Better hurry then.” He moved his fingers faster, curling them just right.

I whimpered. “You’re going to make me cum right here?”

“That’s the plan.” His free hand squeezed my breast through my dress, thumb flicking over my hard nipple. “Cum for me, Cassandra.”

The pressure built until I couldn’t hold it. I came hard, biting his shoulder to stay quiet. Waves of pleasure rolled through me as he kept stroking, drawing it out.

When I finally caught my breath, I looked up at him. His eyes were dark with need, lips parted. “My turn,” I whispered, reaching for his belt.

He groaned as my hand wrapped around him. “Fuck, yes.”

I stroked him slowly at first, loving how hard he felt. “You’re so big,” I said, surprised at my own boldness.

Alexander’s head fell back. “Keep talking like that and this won’t last long.”

I pumped faster, twisting my wrist the way I thought he’d like. His breathing grew ragged. “Cassandra… shit, just like that.”

We were lost in it, hands on each other, breaths mingling. The risk made everything hotter. Any second, footsteps could come up the stairs.

“Tell me you want me inside you,” he said, voice strained.

I nodded, stroking him tighter. “I do. But we have to be quick.”

He spun me around suddenly, facing the wall. My dress flipped up, panties pushed aside. I felt the blunt head of his cock pressing against me.

“Alexander, wait…”

But he pushed in, stretching me in one smooth thrust. We both moaned. He filled me completely, so deep I saw stars.

“God, you’re tight,” he growled, gripping my hips. He started moving, slow at first then faster. The sound of skin slapping filled the hallway.

I pushed back against him. “Harder. Please.”

He gave me what I asked for, pounding into me. One hand reached around to rub my clit again. “Cum with me this time.”

Pleasure coiled tight again. I was close, so close.

Then we heard it. Footsteps on the stairs.

“Alexander? Cassandra? You two up there?” His dad’s voice echoed closer.

We froze, still joined together. Alexander’s cock vibrated inside me.

“Oh shit,” I whispered, panic mixing with the thrill.

He didn’t pull out. Instead, he covered my mouth with his hand and thrust once more, slow and deep. “Don’t make a sound,” he breathed in my ear.

The footsteps reached the top of the stairs. My heart raced wildly.

“Alexander?” His dad called again, only a few feet away now from the corner.

I clenched around him involuntarily, terrified and turned on at the same time. Alexander’s grip tightened.

What would happen if we got caught right now, like this?

The next second stretched forever as the footsteps paused…