“I’m cold,” Claire sighed.
It wasn’t a complaint. It was a low, soft invitation that barely left her lips.
I was Adam, stretched out on the slate sofa, wearing only boxers. The air conditioning in our Florida home was set to arctic, a necessity I loved.
She stood a few feet away, a shivering contradiction, wrapped head-to-toe in heavy grey sweats. She seemed perpetually chilled, even when the rest of the world was melting.
The thick hoodie swallowed her small frame, hiding the trim curves she earned running cross country. But her light brown hair, braided loose, spilled down the front—a warm rope against the faded fabric.
Her eyes, deep umber, watched me from under the shadow of the hood.
She lifted one bare foot, then the other, off the cool tile, a delicate, deliberate tremor.
“Mind if I join you, Adam?” Her voice was a wisp of breath.
“Into the NBA Finals now?” I teased, lifting one lazy eyebrow.
“Hardly.” She chuckled, a soft, melodic sound. “But this AC is cruel. Dad said if I touch the thermostat again, I’m grounded for a month.”
I waited.
She took a step closer. “I just need to borrow some body heat, Adam. For a bit.” Her gaze was direct, unwavering.
I offered a casual shrug. Claire was a sweet presence, but the unexpected thought of her closeness made something inside me tighten.
I didn’t give a proper nod, but it was enough.
She didn’t take the ample space beside me. She dove right in, immediately tucking herself along my side.
Her cold, thick sweatpants pressed instantly against my bare thigh. She burrowed her head into my shoulder, letting out a deep, appreciative sigh.
“Ooh, you’re impossibly warm,” she purred, her breath heating the exposed skin of my neck. It sounded less like a compliment and more like a claim.
“Feel better?” My voice was rougher than I wanted it to be.
A subtle shudder ran through her slender body. “Getting there,” she whispered, molding her shape tighter against mine.
I rarely got a proper sense of her shape, always hidden beneath layers. Now, pressed against me, I felt the surprising pressure of her hip and shoulder.
The game faded into background noise. I finally closed my hand over the remote and clicked the TV off.
“It’s late, Claire. Time to call it a night.”
She stirred, letting out a small, disappointed sound. “Oh. Okay. I was just finally getting warm.”
She shifted, and I felt her small body twist. Her umber eyes tracked down my leg, lingering where the cotton of my boxers ended.
“And you,” she murmured, a playful challenge in her voice. “How are you not freezing, in just those?”
“I’m used to it. Come on, now. Get your sweet arse to bed.” I stood, hands braced on my hips, daring her to move.
She laughed, a throaty, knowing sound that caught in her chest. “I am your sister, Adam. But thanks for the offer. That would certainly warm me up.”
My breath hitched. “I didn’t mean that.”
But the hard, immediate twitch deep in my boxers betrayed the lie.
“Can you get in my bed, just to get me warm and then you can go to yours after, please.” She begged.
“I am not getting into bed with you wearing all of that, even if you are cold. You should be wearing a bloody nightie,” I said as I folded my arms looking at her. “If you change into a nightie then yes.”
“Alright, Mr. Practical,” she said, her umber gaze holding mine. There was a spark there, mischievous and dangerously confident. “You asked for it. Just come to my room in 5 minutes, ill be in bed shivering though, so you better warm me up.”
I waited 5 minutes and then quietly went into her room. She was on her side inside the bed covers shivering. Her back facing me, so I gently got in and spooned her to keep her warm. Not realising my hand resting just under her boobs with my crotch nestled into the crack of her arse.
A low, contented sigh escaped Claire’s lips as she melted into my embrace, her shivers gradually subsiding. “Oh, Adam,” she murmured, her voice a sleepy rasp. “You’re even better than a weighted blanket.” She leaned back further, pressing her spine into my chest, a small, trusting movement that sent a jolt through me. Her bottom accidently stimulating my cock. “We can do it, if you want but we need to be quiet.”
Wait, was she being serious right now. My cock was now throbbing against her. “You… you serious. You want my cock.”
Claire exhaled—slow, deliberate—before arching ever so slightly against me. “Mmm…” The sound curled in the dark, teasing. “Wouldn’t have asked if I wasn’t.”
My pulse pounded. Her hip rolled back, grinding against me in a way that left no room for misinterpretation.
I swallowed hard. “Claire.”
“Adam,” she mimicked, playful but unwavering.
The thin fabric of her nightie did little to disguise the heat between us. My fingers twitched where they rested beneath her ribs, thumb dangerously close to the swell of her breast.
“You’re sure?” My voice was rough.
She turned her head just enough for her lips to brush my jaw. “Do I feel unsure?” Another shift of her hips, another pulse of friction.
Christ.
I slid my hand up, cupping her breasts through her nightie. My other hand pushing her nightie up to her hips. Fuck she had no knickers on, I got my cock out and pressed it against her bare pussy lips and I slowly sank inside her from behind.
A gasp hitched in Claire’s throat, a soft, almost silent sound that was swallowed by the bedsheets. Her body tensed, then melted, a shiver running through her that wasn’t from the cold. She squeezed her eyes shut, pressing back into me, taking me deeper.
“Oh,” she breathed, her voice a fragile whisper against the pillow. “You meant it.” A tiny, wicked smile played on her lips.
I gripped her hips, pulling her closer, feeling the incredible heat of her. “Did you think I wouldn’t?” I rasped, my breath hot on the nape of her neck.
She shifted, ever so slightly, a small, teasing grind that made my jaw clench. “I hoped you would,” she whispered, her fingers finding my arm, tracing circles on my skin. “Show me, Adam. Show me how much.”
My hips began to move, slow at first, then gaining a rhythm. Her soft moans grew, each one a sharp spike of pleasure. The thin nightie was forgotten, bunched around her waist, her skin hot and slick against mine.
“Hold me tight,” she pleaded, her voice a low purr. She arched her back, giving me better access, her head falling back against my shoulder. Her braided hair brushed my chest.
I pulled her even closer, burying my face in her neck, tasting her skin. “Like this?” I asked, pushing deeper, faster.
“Yes,” she gasped, her body vibrating with each thrust. “Just like that. Don’t stop.” She dug her nails lightly into my arm, a silent plea.
Each movement sent a jolt of fire through us both. Her breath came in short, sharp bursts, her skin flushed. The room, once cool, now felt impossibly hot. Our combined heat. Our secret.
“Adam,” she whimpered, her voice cracking, a raw, primal sound. “Oh, Adam. Please.” Her hips matched mine, a desperate, urgent rhythm. My dick sliding in and out of her squelchy wet pussy hole as I kissed her neck.
As I thrust deeper, faster, Claire’s body responded in kind, her hips rocking back to meet mine in a primal rhythm. The nightie was a forgotten scrap of fabric, clinging to her sweat-slicked skin as I savored every inch of her.
My fingers dug into her hips, angling her just so to take me even deeper, the sensation of her tight, wet heat enveloping me almost too much to bear. I braced myself over her, my weight pinning her to the mattress as I claimed her mouth in a fierce, hungry kiss.
Claire moaned into my lips, her tongue tangling with mine as she wrapped her legs around my waist, pulling me in tighter. The sensation of her legs locking around me, the press of her ankles to the small of my back, sent a fresh wave of lust crashing through me.
“Fuck, Claire,” I groaned against her mouth, the words torn from me by the sheer intensity of the pleasure. “You’re so fucking tight. So wet for me.”
She whimpered, a desperate, needy sound that only spurred me on. My hips snapped forward, each thrust meeting her body with a slick, wet slap of skin against skin.
“Yes, Adam,” she mewled, her voice a ragged, breathless whisper. “Just like that. Harder. Please.”
I obliged, my movements becoming almost brutal in their intensity as I chased our mutual release. Claire’s moans grew louder, more frequent, her body tensing and relaxing in a rhythm that mirrored my own.
“Adam, I’m close,” she gasped, her fingers scrabbling at my back, digging into my skin. “Don’t stop, don’t stop.”
I couldn’t have even if I’d wanted to. Claire’s pussy was clenching around me, milking my cock with a ferocity that left me breathless. With a few more forceful thrusts, I felt the pressure building at the base of my spine, my release imminent.
“I’m going to come,” I warned her, my voice ragged with barely contained need. “I’m going to fill you up, Claire.”
A keening wail tore from her throat as her body stiffened, her walls convulsing around me in a vice-tight grip. “Yes, Adam, yes!” she screamed, her orgasm crashing over her in waves.
I followed suit, my own climax hitting me like a freight train. With a hoarse roar, I buried myself to the hilt, my cock pulsing as I released deep inside her, filling her to the brim with my seed.
We lay there for a moment, stunned and sated, our bodies still joined as our hearts slowly returned to a normal rhythm. Finally, I pulled out, carefully withdrawing from Claire’s tender flesh.
As I rolled off her, she turned to face me, a sleepy, satisfied smile curving her lips. “Wow,” she breathed, her voice still husky from exertion. “That was…something.”
I chuckled, running a hand through my tangled hair. “I’ll say. Who knew getting cold could lead to so much heat?”
Claire giggled, her eyes sparkling with mischief. “Always a surprise with you, big brother.”
I raised an eyebrow, a hint of a smirk playing on my lips. “Is that so? Well, I guess we’ll just have to keep you warm another night.”
She bit her lip, a coy expression dancing across her face. “I think that can be arranged.”
And with that, we settled back into our respective sides of the bed, basking in the afterglow of our illicit encounter, already planning our next clandestine moment.