"Please, I'm desperate, " Jill whined, her hand pressed against the door to the bathroom. The sound of running water and Mark's muffled humming could be heard from the other side. She hopped from one foot to the other, her bladder close to bursting.
Mark sighed, his hand pausing mid-shampoo. "Fine, " he called out. "But make it quick."
Jill dashed in, her eyes averted from her brother's naked form as she rushed to the toilet. She could feel his gaze on her, a hint of amusement in the air. She sat down and peed, her cheeks burning with embarrassment. The shower curtain was slightly ajar, and she could see the outline of Mark's body through the foggy glass.
As she stood to flush, she couldn't help but peek. His back was to her, the water cascading down his muscular shoulders and back. She felt a strange ache in her belly, remembering the feel of his cock in her hand earlier that week.
Mark turned off the shower, the water droplets glistening on his skin like jewels. He reached for a towel, wrapping it around his waist with a knowing smirk. "Eyes up here, sis, " he teased.
Jill's cheeks burned as she looked away from the tempting sight of his wet, muscular body. She flushed even deeper when she realized she had been staring at his towel-covered crotch. "Sorry, " she mumbled, feeling the weight of their secret hanging heavy between them.
"It's okay, " Mark said, his smirk growing wider. "You don't have to hide it, Jill."
With that, he dropped the towel with a dramatic flair, letting it pool around his feet. Jill's eyes snapped back to him, her gaze drawn to his now fully exposed erected cock. It hung heavily between his legs. She felt a warmth spread through her thighs, a naughty thrill of excitement.
"You're always welcome to join me, " Mark said, stepping out of the shower and reaching for another towel to dry his hair. His casualness made Jill's heart race even faster.
Jill swallowed hard, her eyes unable to leave the sight of her brother's naked body. "I don't know, " she said, her voice barely above a whisper. "It's just...weird but exciting"
"Only if you make it weird, " Mark said, his tone playful. He stepped closer to her, the warmth from the shower enveloping her. "We're just exploring, right?"
Jill nodded, her eyes still fixed on his cock. It was already beginning to stir at the sight of her, standing so close and vulnerable. "I guess, " she murmured, her voice trembling.
Mark took a step closer, his hand reaching out to trace the line of her jaw. He leaned in, his warm breath tickling her ear. "Let me make you feel good again, " he whispered.
Jill's breath hitched, the memory of his mouth on her pussy making her knees wobble. She looked up at him, her eyes wide with a mix of fear and longing. She didn't know if she could go through with it again, but the curiosity was too strong to resist. She nodded, her voice a mere breath of sound.
Mark's hand slid down her cheek, leaving a trail of heat as it traveled to the neckline of her pajama top. With a gentle tug, he began to pull it down, revealing her small, juicy breasts. Jill's eyes widened in surprise, but she didn't protest. She felt a strange thrill at his dominance, the way he took control so effortlessly. Her nipples stiffened in the cool air, and she watched as his eyes darkened with lust.
He leaned down, capturing one of her nipples between his lips, his tongue flicking against the sensitive peak. Jill gasped, her hand shooting up to cover her mouth.
"Shh, " Mark murmured, his hand moving to her side to pull her pajama bottoms down. "
He lowered her gently to the cold tile floor, her legs trembling with anticipation.
"Mark, " she whispered, her voice filled with a mix of excitement and trepidation.
"Shh, " he murmured against her skin, his warm breath sending shivers down her spine. He knelt before her, his eyes glued to hers as he tugged her pajama bottoms of completely.
With a gentle push, Mark parted her juicy ivory legs, his eyes dark with hunger as he took in the sight of her young, bald juicy pussy. Jill felt a rush of heat and fear mingled with excitement. This was so wrong, but she couldn't bring herself to stop him.
He leaned in, his nose brushing against her sensitive flesh, inhaling her scent deeply. His breath was hot against her skin, sending a shiver down her spine. He kissed her inner thigh, the tender touch making her legs quiver. She watched as he moved closer, his tongue darting out to lick a slow, agonizing path up to her pussy.
Jill's eyes widened as Mark's mouth closed over her clitoris, his tongue swirling around the sensitive nub with an enthusiasm that left her gasping. His hands gripped her hips, holding her in place as he devoured her eagerly. Each flick and suck sent bolts of pleasure through her body, making her toes curl and her back arch. She had never felt anything so intense, so overwhelming.
As his tongue worked its magic, Mark's fingers slid up her thighs, sending goosebumps racing across her skin. He paused for a moment, his eyes meeting hers with a question in his gaze. Jill nodded, her breath coming in quick, shallow gasps. He took it as permission, his middle finger sliding into her wetness with ease.
Her eyes rolled back in her head as he began to pump his finger in and out, the feeling of fullness making her moan. His mouth never left her clit, the combination of sensations making her body tremble. It was as if he could read her every thought, knew exactly what she needed. Her hips began to rock against his hand, her body begging for more.
Mark chuckled against her, the vibration sending another shockwave of pleasure through her. He added a second finger, stretching her tight opening even further. Jill's eyes snapped open, her gaze locking onto his. There was something in his eyes she hadn't seen before, a darker, more primal need that sent a thrill through her.
With a sudden movement, Mark stood, pulling her to her feet and turning her around. He laid back on the cold tile, his cock standing tall and proud. "Ride me, " he murmured, his voice thick with desire.
Jill's eyes widened, but she didn't hesitate. She straddled him, her pussy hovering just above his hard cock. He reached up to guide her down, the tip of his cock nudging at her entrance. She took a deep breath, feeling the pressure as she began to lower herself onto him.
"Take it slow, " Mark instructed, his voice gentle. "Just ease down."
Jill nodded, her eyes squeezed shut as she felt the head of his cock begin to penetrate her. It was a strange feeling, both painful and pleasurable at the same time. She bit her lip, her body tightening around him. Mark's hands gripped her hips, holding her steady as she inched down further. She could feel him stretching her, filling her up in a way she had never felt before.
"That's it, " he murmured, his voice soothing despite the intensity of the moment. "Just like that."
Jill felt the head of Mark's cock push past her tight barrier, and she gasped. A sharp pain shot through her, and she froze. Mark's hands tightened on her hips, holding her in place.
"It's okay, " he soothed, his voice low and gentle. "Just breathe, Jill. It'll get better."
Jill took a deep breath and nodded, her eyes welling with tears. She forced herself to relax, feeling the pressure ease slightly. With a soft whine, she sank further down, her pussy stretching around him. The pain began to subside, replaced by a deep, full sensation that made her insides quiver. She felt so...so naughty, doing this with her brother. But she couldn't deny the excitement that flooded her.
Mark's hands slid around to cup her ass, his fingers digging into her flesh as he guided her movements. "That's it, " he murmured, his voice strained with his own arousal. "Take it all."
Jill took another deep breath and pushed down, feeling the rest of his length fill her up. She was so tight, so small and tight compared to him, but she felt a strange sense of accomplishment at being able to take all of him. Her pussy was stretched to its limits, but the pain had given way to an intense pressure that bordered on pleasure. She began to rock her hips slightly, getting used to the feeling of him inside her.
Mark groaned, his eyes never leaving hers. "You're so tight, Jill, " he murmured, his voice thick with need. "It feels so good."
Jill's cheeks flushed as she began to move in earnest, her hips rocking back and forth, taking him deeper with each stroke. She felt his hands tighten on her ass, guiding her, urging her to go faster. The sensation of him filling her was strange, but it didn't take long for the discomfort to give way to a building heat. Her pussy was clenching around him, eager for more.
Her movements grew more confident, her breath coming in quick, shallow pants. She could feel the tension building in her belly, a coil of pleasure winding tighter and tighter with each grind. Mark's eyes never left hers, his gaze intense and hungry. He was watching her, studying her every reaction, and she felt a thrill at being the center of his attention.
Her pussy began to clench around him, her juices coating his cock as she picked up the pace. The sound of their bodies slapping together filled the small bathroom, echoing off the tiles. She felt so wanton, so wild, and she didn't care. All that mattered was the feeling building inside her, the crescendo of pleasure that was getting closer and closer.
Mark's hips began to buck up to meet hers, his strokes growing more urgent. Jill could feel the tension in his body, the way his muscles tightened beneath her. He was close, she could tell, and the thought of making him cum again was intoxicating. She leaned forward, her breasts brushing against his chest as she moved faster, her pussy squeezing him tightly.
With a strangled cry, she felt her orgasm crest, her body shuddering with the force of it. Her pussy clamped down around his cock, her muscles contracting in waves of pleasure. Mark groaned, his eyes squeezed shut, his face a mask of ecstasy. He pulled out just as she came as released her girlie juices, the sensation of emptiness making her cry out.
Jill looked back over her shoulder, her eyes wide with surprise, just in time to see him stroke his cock once, twice, and then cum spurted out, painting her ass with hot streaks of white. She felt a strange mix of shock and excitement, watching him cover her in his seed. It was so raw, so animalistic, and she couldn't believe she was the one causing him to lose control like this.
They remained in that position for a moment, both of them panting, their bodies slick with sweat and cum. Then, with a gentle touch, Mark helped her off of him, his cock now softening. He turned the shower back on and stepped in, holding out his hand for her to join him. The warm water cascaded over them, washing away the evidence of their transgressions.
Jill felt a strange mix of emotions, a whirlwind of pleasure, fear, and excitement. She knew that what they had just done was wrong, but she couldn't ignore the intense connection that had formed between them. She stepped into the shower, the warm water caressing her skin as Mark pulled her into his embrace.
Her eyes searched his, looking for reassurance, for something that would tell her this was okay. And then, before she could think better of it, she leaned in and kissed him. It was a soft, tentative kiss, filled with the innocence passion and love of her curiosity. Mark's eyes widened in surprise, but he didn't pull away. Instead, his arms tightened around her, and he deepened the kiss, his tongue sliding into her mouth.