Chapter 2: Claiming From Behind
She stayed like that for a long time, a warm, heavy weight on his chest. Her breathing slowed, deepened. The frantic energy of the room settled into a thick, honeyed quiet. Adam’s hands traced idle patterns on the smooth skin of her back, over the subtle bumps of her spine. He was still inside her, still hard, and the sensation of being connected like this—softly, without frantic motion—was almost more intimate than what had come before.
“You okay?” she murmured into the hollow of his neck. Her voice was raspy, sleep-soft.
“Yeah.” It was all he could manage. His mind was a clear, blank sky. All the noise, the guilt, the frantic fantasy was gone, burned away in the pure, physical truth of her.
She chuckled, the vibration traveling through his body. “Good.” She shifted slightly, a subtle internal clench that made him gasp. “Because we’re not done.”
In one fluid motion, she pushed herself up and off him, rolling to her side on the rumpled sheets. The separation felt sudden, a cold shock where her warmth had been. He instinctively reached for her, but she was already moving.
She knelt on the bed, her back to him. The afternoon sun caught the sweat-damp line of her spine, the perfect, heart-shaped curve of her ass. She looked over her shoulder, dark hair sticking to her cheek, a sly smile playing on her lips. Her eyes were dark and knowing.
“Take me from behind, little brother,” she said. Her voice wasn’t a command so much as an invitation, low and breathless. "Just like in your magazine, this is how your big sister prefers having sex."
Adam stared. The view was dizzying. The dark thatch of hair between her thighs, glistening. The way she presented herself, so openly. It was an image straight from the glossy, shameful pages of his magazine, but it was real. She was real. The air left his lungs in a slow, shaky stream.
He moved behind her, his limbs feeling clumsy and new. He knelt on the mattress, the old springs creaking under his knees. His erection bobbed between his legs, painfully eager. But the mechanics suddenly seemed impossible. The angle was wrong. He was too short, or she was too tall. He hovered there, unsure, his hands hovering over the swell of her hips.
Helena glanced back and saw his hesitation. A soft laugh escaped her. “It’s not calculus, Adam.” She reached one hand back, her fingers finding him, guiding him. Her touch was sure, familiar now. “Here.”
She adjusted her posture, arching her back deeper, lowering herself just a fraction. Her other hand pressed into the mattress for support. With her guidance, he found the hot, wet entrance. He pushed forward, a slow, deliberate slide that made them both groan. It felt different this way—deeper, somehow. More possessive. His hands settled on her hips, his fingers sinking into the soft flesh.
“Yeah,” she sighed, her head dropping between her shoulders. “Just like that.”
He began to move, tentative at first, pulling back and pushing in, finding a rhythm that was his own. The slapping sound of their bodies was obscenely loud in the quiet room. He could see everything—the way she took him, the ripple of muscle in her back with each thrust. It was a raw, visual feed that short-circuited his shyness.
“Harder,” she whispered, her voice strained.
He obliged, his thrusts gaining force. His own desperation was returning, a coil tightening low in his gut. He watched, mesmerized, as her body rocked forward with his push, then back to meet him. He was no longer a passenger. He was driving this.
One of her hands snaked back, gripping his thigh, her nails biting into his skin. “Don’t stop,” she gasped. “God, right there.”
Her encouragement snapped something in him. The last vestige of his awkwardness burned away in a surge of pure, hungry want. He fucked her in earnest now, his pace becoming relentless, pounding into her with a force that shook the bedframe against the wall. The model rocket on his desk trembled with each impact.
Helena’s moans turned into throaty, broken cries. “Fuck, Adam! Yes!” Her words dissolved into a wordless, guttural sound as her body tightened around him like a vise. He felt her orgasm this time, a violent, rhythmic pulsing that milked him, pulling his own climax up from some deep, hidden well.
It ripped through him with a force that blinded him. He cried out, a raw, unfamiliar sound, as he buried himself as deep as he could go and held there, pulsing into her. The world shrank to a single, white-hot point of connection. He spilled into her, each throb a surrender.
When it was over, he collapsed forward, his chest pressing against her sweat-slick back, his face buried between her shoulder blades. They stayed like that, joined, both trembling, breathing in ragged unison. The only sounds were their gasping breaths and the faint tick of his bedside clock.
Slowly, carefully, he slipped out of her. She winced slightly, then eased herself down, rolling onto her side to face him. They lay nose to nose on the tangled sheets. Her eyes were heavy-lidded, sated. A thin sheen of sweat coated her skin.
For a long while, neither spoke. The reality of what they had done—twice now—settled over the room like dust.
Helena broke the silence first. Her voice was a hoarse whisper. “So. That’s what that’s like.”
Adam could only stare at her. His mind was beginning to reboot, thoughts flickering to life like faulty neon signs. My sister. I just came inside my sister. Twice. The words should have carried horror. Instead, they carried a shocking, peaceful weight. It was just a fact.
“Yeah,” he finally said.
She reached out and brushed a damp strand of hair from his forehead. “You’re a quick learner.”
He managed a weak smile. “Good teacher.”
She returned the smile, but it didn’t quite reach her eyes. Something else was there now, a pensiveness that hadn’t been there before. She studied his face as if seeing it for the first time.
“You look different,” she said.
“So do you.”
She propped her head on her hand. “What do we do now?”
The question hung in the air. It was the only question that mattered. Adam’s gaze drifted past her, to the peeling corner of a starship poster. His childhood was literally fading on the walls around him. “I don’t know,” he admitted. The numbness of release was fading, and a low-grade anxiety was seeping into its place.
“We don’t have to decide anything,” Helena said, her practical tone returning. She sat up, swinging her legs over the side of the bed. Her back was to him, the elegant line of it straight and unashamed. She stood, a nude statue in the afternoon light, and walked calmly to his closet. She pulled out one of his large, worn band t-shirts and slipped it over her head. It fell to her mid-thigh. She then tossed a pair of his sleep shorts at him, which landed on his chest.
“Get dressed,” she said, her voice returning to its normal, casual register. “I’m starving. We’re making grilled cheese.”
Adam blinked, stunned by the sudden domestic normalcy. He pulled on the shorts, his body feeling used and pleasantly sore. He followed her out of the bedroom and down the stairs, his bare feet silent on the cool wood.
The kitchen was bright, clean, ordinary. Helena moved through it with a familiar ease, pulling butter, cheese, and bread from the fridge. She fired up the stovetop, the mundane click-click of the igniter sounding absurdly loud.
Adam slid onto a stool at the kitchen island, watching her. She looked so normal in his t-shirt, her hair messy, making lunch. It was the most bizarre sight he’d ever seen.
“So,” she said, not looking up as she buttered bread. “You’re probably freaking out a little bit now.”
He let out a short, airless laugh. “A little.”
“That’s normal.” She placed a slice of cheese. “The world hasn’t ended. The kitchen is still here. I’m still making you a shitty grilled cheese.”
“Why?” The word burst out of him. “Why… this?”
She glanced up, met his eyes. Her expression was unreadable. She lowered the heat under the pan before answering. “Because I wanted to. Because you wanted to. Because it felt good.” She shrugged. “Maybe that’s all it needs to be.”
“And Mom and Dad?”
Helena’s face hardened slightly. “What about them? They’re in Napa until Sunday. This is our house. Our lives.” She flipped the sandwich with a practiced flick of her wrist. The butter sizzled. “This stays between us, Adam. That’s the only rule. The most important rule.”
He nodded slowly. The rule made sense. It was a fence around this impossible thing, containing it.
“They can never know,” she continued, her voice low and serious. “Not a hint. Not a whisper. In this house, as far as they know, we are just brother and sister. You got it?”
“I got it.”
“Good.” She slid the golden, perfectly crisped sandwich onto a plate and pushed it across the island to him. She made one for herself and came around to sit beside him.
They ate in silence for a few minutes. The cheese was stringy and hot. It was the best grilled cheese he’d ever tasted.
“Was it…” he started, then hesitated. “Was it what you thought it would be?”
Helena took a bite, chewing thoughtfully. She stared at the backsplash tiles, her eyes distant. “It was better.” She finally looked at him. “You were better. Less whiny than the guys in those magazines, for sure.”
He felt a blush creep up his neck. He looked down at his plate.
“Hey,” she said softly. She nudged his foot with hers under the counter. “Stop overthinking it. You’re allowed to enjoy it.”
He met her gaze again. The confidence he saw there was an anchor. He nodded.
She finished her sandwich, drank a glass of water, and stood. “I’m gonna take a shower.” She walked to the kitchen doorway, then paused, looking back at him. A slow, wicked grin spread across her face. “Unless you want to join me?”
Adam’s heart leapt into his throat. The casual offer, the sheer normality of a shared shower after everything, was more shocking than anything that had happened in the bedroom. He opened his mouth, but no sound came out.
Helena laughed, a rich, full sound that echoed in the quiet house. “I’m kidding. Mostly.” She winked. “Your turn next. ”
She disappeared down the hall. A moment later, he heard the bathroom door shut and the pipes groan as the shower turned on.
Adam sat alone in the bright, quiet kitchen, the taste of butter and cheese and something utterly new on his tongue. He looked at the empty stool beside him, at the crumbs on her plate. He looked at his own hands, resting on the cold granite.
Everything had changed.
Nothing had changed.
The shower water ran, a steady, secret promise in the heart of the house.