We shouldn’t be doing this, Step-brother

Sienna

The room still smelled of him when I slipped out of his bed. My legs trembled as I pulled on my clothes, skin still humming from where his hands had been. The sheets clung to my thighs like they wanted to hold me there, but I forced myself to move.

I paused at the door, my chest rising and falling too fast. What had we just done? My lips still tingled, swollen from his kisses, and every step I took down the hall carried the weight of a secret I had no idea how to bury.

The house was quiet. The kind of silence that makes every creak in the floorboards sound like thunder. I pressed a hand to my chest, trying to calm the wild beat of my heart. No one could know. Not now. Not ever.

I slipped into my own room before dawn had even softened the sky. My fingers brushed my lips again, and I shut my eyes, replaying everything. The way he pulled me close. The way I couldn’t say no. The way I didn’t want to.

When morning came, I forced myself to act normal. To wash my face, fix my hair, and sit at the long dining table like nothing had happened in the dark hours before.

I stirred the food on my plate without tasting it. The clatter of cutlery from the kitchen made me jump. I told myself to breathe, to smile, to pretend.

And then I saw him.

Jaxon.

Walking toward the dining room with that same quiet intensity, his gaze sweeping the room before locking onto mine. My stomach twisted, heat rushing up my neck.

I gripped the edge of the table, praying no one else could see what passed between us in that split second.

Jaxon

“I should feel satisfied,” I muttered into the dark, palms dragging down my face. “But I’m fucking starving.”

The bed was cold without her. Sheets smelled like her skin, my hands still smelled like her hair, but she’d slipped out like what we’d done was something dirty like I was something dirty.

She ran.

Not just from my bed. From me.

And that wide-eyed, guilty look she’d left behind burned hotter than her mouth ever had.

By morning, the house was too damn quiet. My old man hummed while flipping pancakes, Sienna sat at the table clutching her mug like it was a shield. And me? I wanted to drag her upstairs and remind her what she’d done. What we’d done.

Instead, I dropped into the chair across from her.

She didn’t look up. Not once. Not when my leg brushed hers under the table. Not when I let my phone drop just to make her glance. Nothing.

“Morning, you two,” Lena sang as she walked in. Sunshine, small talk, fake ease.

“Morning, Mom,” I said flat.

Sienna’s voice was smaller. “Morning, Lena.”

Lena frowned. “You two are quiet. Everything okay?”

Sienna forced a smile. “Just tired.”

I let the corner of my mouth twitch. “Yeah. Long night.”

Her eyes shot to mine with a flash of panic then darted away so fast it almost made me laugh. Almost.

“Jaxon, phone down,” Lena said gently.

I tossed it aside, leaned forward. Finally, her gaze collided with mine for a split second. Wide. Guilty. Terrified. Exactly like last night.

She bolted up. “I need some fresh air.”

And just like that, she ran again.

But she had no clue, I was already following.

Sienna

The air outside was sharper than coffee. Cleaner than guilt. I pulled my jacket tight and walked, anywhere, nowhere, just away from that kitchen, away from Jaxon’s eyes cutting into me like a blade.

“Why’d you leave?” his voice came, low, behind me.

I spun. He stood by the trees, hands in his pockets, dark eyes burning. Watching me like a predator watching prey.

“I’m not letting you run again,” he said.

“I’m not running,” I lied, breath unsteady.

“You ran last night. You ran at breakfast. You’re running now.” He started forward, slow. “You can’t handle this, Sienna. But you started it. Now you finish it.”

“I didn’t start anything,” I snapped. “You came into my life and wrecked it. Don’t twist this on me.”

“Don’t twist it?” His voice rose, hard. “Who touched me first? Who climbed into my bed? Who begged me not to stop?”

My throat went tight. “That’s not fair.”

“Life’s not fair,” he shot back.

He was close now. Too close. The pine scent of him filled my head, made my knees weak.

“I am scared, Jaxon. You don’t get it. What did you think would happen? That we’d just sneak around, pretend nothing’s wrong, and live happily ever after?”

“Yes.” His answer was steel. “Because that…us…last night…that was real. The most real thing I’ve ever had. And I’ll be damned if I let you throw it away.”

He was inches away, and my traitorous eyes dropped to his mouth.

“I can’t,” I whispered, hating the way my body betrayed me, heat pooling low, memories of his hands all over me flashing.

His fingers caught my chin, forcing my gaze up. His eyes locked mine, fierce, unrelenting.

“Yes, you can,” he growled. “Stop fighting me. Stop fighting us.”

I trembled as his lips brushed my ear, his breath hot.

“I know a place,” he whispered. “No one will find us. No pretending. Just you and me.”

“Where?” The word left me before I could stop it.

“The lake house,” he said, voice dark with promise. “An hour away. Empty. Ours.”

My stomach twisted. Every alarm screamed no. But my body screamed yes.

“I can’t,” I said, weak, trembling.

His grip tightened. “Then tell me no. Look me in the eye and tell me you don’t want me. That you don’t want to go. Say it and I’ll walk away for good.”

I opened my mouth. Nothing came out. Because it wasn’t true.

Silence hung heavy between us, his lips so close, my body shaking with need.

And then…

“Sienna? Jaxon?”

We both froze.

Kendra’s voice. Sweet, curious. Deadly.

She stood on the lawn, smile painted innocent, but her eyes lingered. Too sharp. Too knowing.

“What are you two doing out here?”

My stomach crashed to the ground. She’d heard. She’d seen. She knew.

And if she opened her mouth, everything was over.