Expanding Your Big StepSister
As you tiptoe towards your big sister's bedroom door, the soft glow of her vanity lights spills out into the hallway. You can't help but steal a glance through the keyhole, watching her reflection in the mirror as she brushes her hair. Her voluptuous figure catches your eye—the way her t-shirt hugs her curves, straining against the seams. Your heart races as you imagine seeing more of her.
Suddenly, she turns around, catching you red-handed. Her eyes narrow, and she's not amused. "What do you think you're doing?" she asks, her voice low and threatening. You freeze, feeling like a deer caught in headlights. "I-I'm sorry, I just," you stutter, unable to look away from her body. "I can't help it. I want to see more."
Her face hardens into a menacing glare, and she steps closer, towering over you. "Get out of here, or I'll tell mom and dad what a perv their son's become." You swallow hard, feeling both terrified and aroused by her dominance. "But I just want to see you," you whisper, your voice barely audible.
She shakes her head, disgusted. "Fine," she says, turning back to the mirror. "But if you don't leave now, I'm not making any promises."
With trembling hands, you reach into your pocket and pull out your new growth device. The thrill of seeing your sister expand right before your eyes overpowers your fear. You take a deep breath, mustering up the courage to press the button. The device hums to life, and your sister gasps as she feels the first tingle of growth spread through her body. Her breathing quickens, her chest heaving as her clothes begin to strain against her rapidly expanding curves.
Her eyes widen in terror as she realizes what's happening. "No! Stop it! Make it stop!" she cries, her voice cracking under the pressure of her growing form. Her body swells, pushing outwards, and you can't help but stare in awe at the sight of her curves bursting through her t-shirt, her pantyhose, and even the ceiling. The sound of fabric tearing fills the room as she struggles against her own uncontrollable growth.
Finally, the growth stops, and you step back in shock as your sister's enormous figure fills the room. She's easily twice your size now, her massive breasts threatening to burst out of her shirt, her hips widening to impossible proportions. Her eyes narrow, and she steps towards you, towering over you like a giantess. "You did this to me," she growls, her voice deep and commanding.
As she advances, you cower in fear, unable to meet her gaze. But something shifts in the air—a new sense of power emanates from her. She stands tall, taking in her newfound size with a sense of wonder and awe. "My god," she whispers, running her hands over her now-massive thighs. "I'm...I'm huge."
The tension in the room thickens as you watch her explore her newfound power. She's no longer the little sister you grew up with—she's a dominatrix goddess, and you're at her mercy. As she turns towards you, her eyes glinting with mischief, you can't help but feel a mix of fear and excitement coursing through your veins. "Now," she says, her voice low and sultry, "tell me what you want to see."
