Chapter 2

　　The tension from the office had followed Elena home like a living shadow.

　　For two weeks, stolen moments in the executive suite had become their filthy secret. Quick, desperate fucks bent over the desk, Marcus's hand clamped over her mouth while he pounded her from behind, his cum dripping down her thighs as she rushed to fix her makeup before the next meeting. But tonight was different. Tonight they were all under one roof.

　　Sophia had returned from her conference that afternoon, glowing and affectionate, oblivious to the way her little sister's body still ached from her husband's rough use. She had insisted on cooking a big family dinner—roasted chicken with herbs, garlic mashed potatoes, crisp green salad. The three of them sat around the long dining table in the penthouse, candlelight flickering across crystal glasses of red wine.

　　Elena wore a modest cream silk nightie that stopped mid-thigh, chosen deliberately because it looked innocent but rode up dangerously when she moved. No panties. The cool air kept reminding her how bare and wet she already was.

　　Sophia laughed softly, tucking a strand of dark hair behind her ear as she refilled Marcus's glass. "The conference was exhausting, but the deals we closed… God, I feel like I can finally breathe again." She reached over and squeezed her husband's hand. "I missed you, baby."

　　Marcus smiled, the picture of the devoted husband, but his eyes flicked to Elena across the table. A dark, hungry glance that made her clench her thighs together under the tablecloth. "Missed you too, Soph. Dinner's incredible."

　　Elena pushed food around her plate, barely tasting it. Every time Sophia touched Marcus's arm or leaned in to kiss his cheek, a twisted bolt of jealousy and arousal shot through her. She was the one who knew how his cock felt stretching her open. She was the one who had swallowed his cum in the office bathroom just yesterday.

　　After dinner, Sophia stretched languidly. "I'm wiped. Early flight tomorrow, but I want my husband tonight." She stood, taking Marcus's hand and tugging him toward the master bedroom. "Come on, babe. Let's go to bed."

　　Elena stayed seated at the dining table, wine glass in hand, watching them disappear down the hallway. Sophia's soft giggle floated back. The bedroom door clicked shut.

　　The penthouse fell quiet.

　　Elena sat there for nearly an hour, heart pounding, pussy throbbing with forbidden need. The silk nightie clung to her stiff nipples. She could still feel the ghost of Marcus's grip on her hips from the office. Finally, unable to resist any longer, she rose silently.

　　Bare feet padded across the cool marble floor. She stopped outside the master bedroom door, listening. Soft, even breathing. They were asleep.

　　With trembling fingers, she turned the handle, easing the door open just enough to slip inside. Moonlight spilled through the large windows, illuminating the king-sized bed. Sophia lay on the far side, facing away, her breathing deep and steady under the heavy duvet. Marcus was on his back, one muscular arm draped loosely over his wife's waist in his sleep.

　　Elena's pulse thundered in her ears. She closed the door with a whisper-soft click.

　　She approached the bed like a shadow, lifting the edge of the duvet carefully. The cool air kissed her bare pussy as she slid underneath, inch by inch, settling herself right between them. The mattress dipped slightly. Neither stirred.

　　Heart hammering, Elena turned onto her side, facing Sophia's back. She arched her spine slowly, deliberately. Her round ass pushed backward until it brushed against Marcus's crotch. The thin fabric of his boxer briefs was the only barrier between her naked cheeks and his heavy cock.

　　She pressed harder, grinding in tiny, teasing circles. His dick twitched. Thickened. She felt it swell against her soft flesh.

　　Elena bit her lip to stifle a moan. She reached behind her, fingers slipping under the waistband of his boxers. She freed his growing erection, hot and velvety, already leaking precum. With a shaky breath, she lifted the hem of her short nightie higher, bunching it around her waist, fully exposing her dripping pussy and ass.

　　She angled her hips and nestled his thick cock between her ass cheeks, the heavy shaft resting right along her slick slit. The head nudged her swollen clit with every tiny movement. Wetness coated him instantly.

　　Marcus's breathing changed.

　　A large, strong hand suddenly clamped over her mouth from behind—firm, silencing. His body tensed against hers.

　　"Shhh," he whispered, barely audible, lips brushing the shell of her ear. His voice was gravel and smoke. "Not a fucking sound, you filthy little slut."

　　Elena's eyes fluttered. Her pussy clenched hard around nothing, a fresh gush of arousal sliding down her thigh.

　　Marcus's other hand slid down her body under the duvet, possessively cupping her breast through the silk, pinching the stiff nipple until she whimpered against his palm. He rocked his hips forward, sliding his now rock-hard cock up and down between her soaked folds, coating every inch in her juices. The fat head bumped her clit repeatedly, sending sparks through her core.

　　Sophia stirred slightly in her sleep, murmuring something incoherent, then settled again, still facing away.

　　Marcus froze for a heartbeat, then continued his slow, torturous grind. "Your sister is right there," he breathed into Elena's ear, so quiet it was almost silent. "And you're rubbing your dripping cunt all over my cock like a desperate whore. Such a dirty, cock-hungry sister-in-law."

　　Elena nodded frantically against his hand, her ass pushing back greedily.

　　He shifted, angling the thick head of his cock at her entrance. With excruciating slowness, he pushed forward. The broad tip parted her slick lips, stretching her open. Elena's back arched deeper, pressing her ass flush against his pelvis as inch after thick inch sank into her tight, greedy pussy.

　　She had to bite the inside of her cheek to keep from moaning out loud. The stretch was delicious—burning, perfect. He filled her completely, bottoming out with his balls nestled against her clit. Her walls fluttered and clenched around him, milking his shaft.

　　Marcus groaned softly into her hair, the sound barely a vibration. He stayed buried deep for a long moment, savoring the forbidden heat, then began to move—slow, deep rolls of his hips. Each thrust was controlled, deliberate, the duvet barely shifting. The wet, obscene sound of her pussy sucking his cock was muffled by their bodies and the heavy covers.

　　Elena's soft, breathy moans were trapped against his large palm. "Mmm… mmmph…" Each exhale trembled with pleasure.

　　He fucked her with passionate intensity, one hand still clamped over her mouth, the other sliding down to rub tight, slippery circles over her swollen clit. His fingers were soaked instantly. "Feel that?" he whispered. "Your sister's husband balls-deep in your cheating cunt while she sleeps two feet away. You're so fucking wet you're dripping down my balls."

　　Elena's hips rolled back to meet every thrust, her ass jiggling softly against his pelvis. The angle let him hit that perfect spot inside her with every slow, grinding stroke. Pleasure coiled tighter and tighter in her belly.

　　Marcus's lips found the sensitive spot on her neck, sucking gently, then biting just hard enough to make her eyes roll back. "Such a tight, greedy little pussy. Squeezing me like you never want me to leave. You love risking everything for this cock, don't you?"

　　She nodded desperately, tears of overwhelming pleasure pricking her eyes.

　　He increased the pace slightly—still careful, still silent—but deeper, harder. The bed creaked faintly. Sophia sighed in her sleep and turned slightly onto her stomach, one arm flopping closer.

　　Marcus didn't stop. If anything, the danger made him thrust with more passion. His fingers worked her clit faster, matching the rhythm of his cock sliding in and out of her soaked channel. Elena's thighs trembled. Her pussy fluttered wildly around him.

　　"Come for me," he whispered, voice dark and commanding. "Come all over your brother-in-law's cock while your sister is sleeping right here. Soak me, you filthy girl."

　　The orgasm crashed over her without warning. Elena's entire body went rigid, back arched sharply, pressing her ass hard against him. Her pussy spasmed violently around his thick shaft, gushing hot wetness that coated his cock and balls. Soft, muffled whimpers vibrated against his palm—"mmm… ahh… mmmph!"—as wave after wave of intense pleasure ripped through her.

　　Marcus held her through it, fucking her slowly through her climax, drawing it out until she was a trembling, oversensitive mess.

　　Only when her body began to relax did he pull out almost completely, then slam back in with one deep, passionate thrust. He buried his face in her hair, groaning low as he came hard, flooding her clenching pussy with thick, hot ropes of cum. Pulse after pulse, filling her until it started to leak out around his cock.

　　They stayed locked together, breathing hard, his hand still gently over her mouth. His cock twitched inside her, softening slowly.

　　After long minutes, Marcus carefully withdrew. A thick trickle of his cum leaked from her well-fucked pussy, dripping onto the sheets between them. He used his fingers to push some of it back inside her, then brought his slick fingers to her lips under the duvet. Elena obediently sucked them clean, tasting their combined juices.

　　He kissed the back of her neck tenderly, possessively. "Go back to your room before she wakes," he whispered. "But tomorrow night… same time. Wear nothing under that nightie again."

　　Elena nodded, legs shaky as she carefully slid out from under the duvet. Her nightie was bunched around her waist, thighs shiny with cum. She glanced once at her sleeping sister, a wicked thrill running through her, then slipped silently out of the room.

　　Back in her own bed, heart still racing, pussy deliciously sore and leaking, Elena smiled into the darkness.

　　The game had just become infinitely more dangerous… and infinitely more addictive