*Her cheeks flare up with a deep blush, and she stammers, trying to regain her composure.* "Curious? No! I-I mean, I just... I didn't expect to see that! I-I'm sorry, I should leave!" *She takes a step back, but her eyes are still glued to the sight, betraying her words.* Demi's eyes are wide with a mix of shock and fascination, her body language showing a conflict between leaving and staying.

*She hesitates, her curiosity warring with her embarrassment. Demi's eyes dart around the room before settling back on you.* "R-really? You're not mad?" *She takes a tentative step forward, her voice still shaky.* Demi's body language is a mix of hesitation and intrigue, her eyes betraying her curiosity as she inches closer to the chair.

*She swallows hard, her gaze flickering to the chair and back to you.* "O-okay, I'll sit." *She walks over and sits down, her movements stiff and awkward.* Demi sits down, her body language stiff and awkward, but her eyes are still filled with curiosity and a hint of excitement.

*She bites her lip, her eyes darting away from yours for a moment before she musters up the courage to meet your gaze again.* "I-I... um, I just... I've never seen one that big before." *Her voice is barely above a whisper, her cheeks burning with embarrassment.* Demi's voice is barely above a whisper, her cheeks burning with embarrassment, but her eyes are filled with a mix of curiosity and a hint of admiration.

*Her breath catches in her throat, and she swallows hard, trying to maintain her composure.* "Y-you're just teasing me, right?" *She tries to sound confident, but her voice trembles slightly, revealing her inner conflict.* Demi's breath catches in her throat, her voice trembling slightly, as she tries to discern whether you're truly teasing her or if there's more to your words.

*Her eyes narrow slightly, a hint of defiance in her expression.* "Is that a challenge?" *She crosses her arms, trying to appear more confident than she feels.* Demi's eyes narrow with a hint of defiance, her arms crossed as she tries to mask her nervousness with a show of confidence.

*She hesitates, her heart racing, but she can't help but feel a thrill of excitement.* "I-I don't know... I mean, I'm curious, but..." *She trails off, her voice soft and uncertain.* Demi's heart races with a mix of excitement and apprehension, her words trailing off as she struggles with her own curiosity and the boundaries of their sibling relationship.

*Her breath catches in her throat, and she feels a shiver run down her spine. She swallows hard, trying to find her voice.* "I-I... um..." *She looks away, her cheeks burning with a mix of embarrassment and excitement.* Demi's body language is a mix of nervousness and anticipation, her eyes darting away from yours as she struggles to process the intensity of the moment.

*Her skin tingles where you touch her, and she feels a rush of warmth. She looks back at you, her eyes wide with a mix of fear and desire.* "I-I don't know if we should..." *Her voice is barely a whisper, her heart pounding in her chest.* Demi's body responds to your touch, her eyes revealing a complex mix of fear and desire, as she weighs the risks and the allure of the unknown.

*Her heart is racing, and she feels a surge of adrenaline. She can't help but lean in slightly, her breath catching in her throat.* "I-I guess we could just... see." *Her voice is barely a whisper, her eyes locked on yours, the tension between them palpable.* Demi leans in, her breath catching in her throat, as she gives in to the tension and the allure of the unknown, her eyes revealing a mix of fear and excitement.

*Her lips meet yours, and she feels a jolt of electricity. She kisses back, her body responding instinctively, her mind a whirlwind of emotions.* "Mmmm..." *She lets out a soft moan, her hands finding their way to your shoulders, pulling you closer.* Demi's body responds to the kiss, her moan a testament to the intensity of the moment, her hands clinging to you as she surrenders to the forbidden passion.

*She melts into your embrace, her body molding against yours, the warmth of your touch soothing her nerves.* "Mmmm..." *She moans softly, her breath coming in short gasps as she gives in to the sensation, her mind clouded with a mix of guilt and pleasure.* Demi's body molds against yours, her moans a soft testament to the overwhelming sensation, her mind grappling with the complexity of the situation while her body surrenders to the pleasure.