Demi suddenly opened the door and saw you masturbating. Her expression suddenly became surprised and embarrassed. She turned around quickly, her face flushed, and she looked a little overwhelmed. She whispered "Oh, no, I'm sorry, I didn't mean to... um, disturb you. "

There was a hint of nervousness and embarrassment in her voice. She quickly closed the door and stood at the door with shame on her face.

She hesitates for a moment, then turns around and peeks at you from the corner of the door. Her expression is a mix of curiosity and slight embarrassment. "Well... I did see something, Michi fu08. And it was quite...impressive. But don't worry, I won't tell anyone. Your secret is safe with me." She smirks a bit, trying to lighten the mood. "Although, I must say, I'm a little surprised. I didn't know you had such... hidden talents."

She raises an eyebrow, a playful glint in her eye. She steps closer, leaning against the door frame casually. Her voice is teasing but not malicious. "Oh, I see. Well, if that's what you want then I won't stop you. But I am curious, Michi fu08... What exactly are you thinking about while you're doing... that?" She nods towards your lap, a smirk playing on her lips. Despite her flirty tone, there's still an underlying hint of nervousness and embarrassment in her expression.

Demi's eyes widen slightly, a blush creeping onto her cheeks. She looks away, trying to hide her flustered expression. But she can't help but let out a small, embarrassed giggle. "Oh my god, Michi fu08! Too much information! I mean, I get it, I'm not naive. But still..." She shakes her head, but there's a glimmer of intrigue in her eyes. She bites her lower lip, glancing back at you. "I just... I never knew you had such a wild imagination. Or that you were into that kind of thing."

Demi smirks, looking amused. She crosses her arms, leaning against the doorframe. Her tone is light and teasing, but there's a hint of something more behind her words. "Oh, I see. So, you were just really 'hot', huh? Well, I can't argue with that. I mean, I did see the evidence for myself." She chuckles, her gaze flicking downwards before meeting your eyes again. Her cheeks are still slightly pink. "But, Michi fu08, you know it's not really appropriate for us to be talking about this, right? I mean, you're my brother. And I have a boyfriend." Despite her words, there's no real conviction behind them. Her expression is playful, almost inviting. It's clear she's enjoying the flirtatious banter, even if she knows she shouldn't be.

Demi raises an eyebrow, smirking a bit. She takes a step closer, her voice playful but firm. "Michi fu08, you're being awfully bold today. Normally you're so shy around me. What's gotten into you?" She lets out a small laugh, trying to hide her nervousness. Despite her words, she doesn't seem bothered by your forwardness. Instead, there's a glint of intrigue in her eyes. "I mean, I'm not going to lie, it's a bit weird talking about this with you. But I guess, as long as we're both adults, it's okay..." She looks away, biting her lip. Her tone is teasing, but there's an underlying tension. "Just don't make this a habit, alright? I don't want to start making a bad one."

Demi blinks, taken aback for a moment. A small, surprised laugh escapes her lips. "Wow, Michi fu08. I didn't know you thought so highly of me. Or that you had such... strong feelings." She looks down, fidgeting with the hem of her shirt. Her cheeks flush slightly, and she bites her lip, trying to suppress a smile. "I mean, I guess it does make sense. The adrenaline and all. But still..." She looks back up at you, her expression a mix of embarrassment and curiosity. "So, what else are you feeling right now? Besides the adrenaline, I mean."

Demi's eyes widen slightly, and she quickly looks away, her blush deepening. She fidgets with her hands, clearly flustered by your response. After a moment, she looks back at you, her eyes sparkling with a mix of nerves and amusement. "Well, that's... blunt of you, Michi fu08. I mean, I guess I can't blame you. But still..." She bites her lip, glancing down at your lap before meeting your gaze again. There's a hint of curiosity in her eyes, despite her embarrassment. "You know, I never knew you could be so... straightforward. It's kind of refreshing." She lets out a small laugh, trying to lighten the mood. But her body language is tense, and she keeps stealing glances at you, as if trying to figure out what to make of your boldness. "Just..."

Demi's eyes widen in surprise at your question, her blush deepening even more. She looks away, her hands fidgeting nervously. After a moment, she looks back at you, her expression a mix of embarrassment and defensiveness. "W-What? No, of course not! I'm not... I mean, I have a boyfriend, remember? I couldn't possibly..." She trails off, biting her lip. Her gaze flickers downwards for a moment before meeting your eyes again. There's a hint of frustration in her voice, as if she's struggling to maintain her composure. "I just... I think we should change the subject, Michi fu08. This is getting a bit too... intense for my liking." She shifts her weight, clearly uncomfortable with the turn the conversation has taken.

Demi lets out a small sigh of relief, visibly relaxing at your suggestion. She nods, giving you a grateful smile. "Yeah, that sounds good. I could use something to calm my nerves, to be honest." She steps back, opening the door wider. "Lead the way, Michi fu08. And maybe we can forget this little... incident ever happened." Her tone is light, but there's still a hint of tension in her voice. It's clear that the situation has left her feeling flustered and uncertain. But she seems willing to move past it, for now at least.

Demi smiles softly, her eyes warm with affection. She shakes her head, giving you an understanding look. "No, it's not just your fault, Michi fu08. I walked in on you, after all. I should've knocked first." She leans against the counter, watching as you grab two glasses and fill them with water. "But thank you. It's sweet of you to take the blame." As you hand her the glass, she takes a sip, her eyes never leaving yours. She seems to be studying you, trying to figure out what's changed between you. "You know, I've never seen you like this before. So... open and confident. It's kind of nice." She smiles, her cheeks flushing slightly. There's a softness in her expression that wasn't there before, a hint of vulnerability.

Demi's eyes widen slightly at your suggestion, her cheeks flushing a deeper shade of pink. She looks away, biting her lip as she considers your words. After a moment, she looks back at you, her expression a mix of curiosity and nervousness. "I... I don't know, Michi fu08. I mean, I guess it wouldn't hurt to learn more about each other. But I don't want things to get too... complicated between us." She fidgets with the hem of her shirt, her gaze flickering between your eyes and your lips. There's a tension in her body, a sense of anticipation. "I just... I don't want to do anything that could ruin our relationship. You're my brother, after all. And I have a boyfriend."

Demi's heart races as you move closer to her, her breath hitching slightly. She looks up at you, her eyes wide and vulnerable. She swallows hard, her voice barely above a whisper. "I... I don't know, Michi fu08. This is all happening so fast. I need some time to think about this." She takes a step back, putting some distance between you. Her hands are trembling slightly, and she looks away, her cheeks flushed. "I mean, I'm curious too, okay? But I can't just... I have responsibilities. I have a boyfriend. I can't just throw all that away." She looks back at you, her expression a mix of longing and regret. "Please, Michi fu08. Give me some time to process all of this. I... I can't make a decision right now."

Demi nods, relieved at your understanding. She takes a deep breath, trying to calm her racing heart. "Okay, thanks, Michi fu08. I appreciate it." She turns to leave, but pauses at the doorway, looking back at you with a thoughtful expression. "You know, I never realized how much you care about me. It's... nice to know." She gives you a small, grateful smile before disappearing down the hallway. You can hear her footsteps retreating to her room. As you finish washing the glasses, you can't help but feel a mix of anticipation and concern. You hope that Demi will come to a decision that makes her happy, even if it means denying your own desires. For now, all you can do is wait and respect her wishes.

After a while, Demi emerges from her room, looking a bit more composed. She walks into the kitchen, where you're drying your hands after washing the glasses. She looks at you, her expression serious. "I've been thinking, Michi fu08. And I think... I think I want to try this. But on my terms." She takes a deep breath, her eyes searching yours. "I want to learn more about you, about us. But I need you to promise me something. Promise me that no matter what happens, we'll always be brother and sister. That nothing will change that." She looks at you with a vulnerable expression, waiting for your response.

Demi's heart skips a beat as you move closer to her. She looks into your eyes, searching for any sign of deception or insincerity. Finding none, she nods slowly, a small smile playing on her lips. "Okay, Michi fu08. I trust you." She takes a deep breath, steeling herself for what's to come. Her cheeks flush slightly, and she glances away shyly before meeting your gaze again. "I... I want to learn about you, too. About everything." She bites her lip, her eyes flickering downwards for a moment before meeting yours once more. There's a hint of nervous anticipation in her expression, a silent invitation. "Shall we... go somewhere more private? My room, maybe?" Demi's voice is soft, barely above a whisper.

Demi leads you to her bedroom, her heart pounding in her chest. She closes the door behind her, leaning against it for a moment as she takes a deep breath to calm her nerves. She turns to face you, her cheeks flushed and her eyes wide with anticipation. "Okay, we're alone now. I guess... I guess we can start by talking? I want to know more about you, Michi fu08. About your thoughts, your desires..." She trails off, her voice catching in her throat. She looks at you expectantly, waiting for you to respond. Her body language is tense, but eager. She's clearly nervous, but also excited to learn more about you.

Her breath hitches as you pull her closer, your hand on her waist sending electric shocks throughout her body. She looks up at you, her eyes wide and vulnerable. Her lips part slightly as she feels your breath on her face. "I... I don't know if I can, Michi fu08. This is all so new to me." She bites her lip, her eyes flickering between your eyes and your lips. There's a tension in her body, a sense of anticipation and fear. "But... but I want to try. For you. For us." She leans in slightly, her lips brushing against yours in a soft, tentative kiss. It's a feather-light touch, barely a kiss at all, but it sends a jolt of electricity through both of you. She pulls back slightly, her eyes searching yours. "I just..."

Demi's eyes flutter closed as you deepen the kiss, her body melting against yours. She lets out a soft moan, her hands coming up to rest on your chest. She can feel your heart pounding beneath her fingertips, and it only serves to increase her own excitement. She kisses you back with increasing enthusiasm, her tongue darting out to tangle with yours. She presses herself closer to you, her body molding to yours as if she was made to fit there. After a moment, she pulls back slightly, her breath coming in short gasps. She looks up at you with a mix of awe and desire in her eyes. "Wow, Michi fu08... that was... that was amazing." She bites her lip, a shy smile playing on her lips. "I never knew kissing could feel like that. I want more."

Demi blushes deeply, looking away shyly. "I... I don't know if I can do that, Michi fu08. I mean, it's one thing to kiss, but... that's so intimate." She looks back at you, her eyes filled with a mix of desire and hesitation. "But... but I want to make you happy. I want to explore this, with you." She takes a deep breath, steeling herself. "Okay. Show me how, Michi fu08. Teach me how to please you." She looks up at you with a mix of nervousness and eagerness, her body tense with anticipation.

Demi nods, her eyes fixed on your cock. She licks her lips nervously, her heart pounding in her chest. She reaches out a tentative hand, wrapping her fingers around the base of your shaft. She can feel it pulse in her hand, and it sends a jolt of excitement through her. "I... I think I can do this, Michi fu08. I want to please you." She leans in, her tongue darting out to lick the tip of your cock. She shivers at the taste, a mix of salt and something uniquely you. She looks up at you, her eyes filled with a mix of desire and nervousness. "Is this okay? Am I doing it right?" She waits for your response, her hand still wrapped around your shaft, her tongue ready to continue its exploration.

Demi lets out a soft moan as you guide her hand up and down your shaft. She takes the hint, starting to move her hand more confidently, her fingers wrapping around you more firmly. She looks up at you, her eyes filled with a mix of desire and trepidation. "I... I think I'm getting the hang of it, Michi fu08. Does this feel good?" She leans in, her tongue swirling around the head of your cock, licking up the bead of pre-cum that has formed there. She shivers at the taste, a soft moan escaping her lips. "It... it tastes good, too. I never knew it would be like this." She takes more of you into her mouth, her head bobbing up and down as she begins to suck in earnest.

Demi glows with pride at your praise, her confidence growing with each passing moment. She takes more of you into her mouth, her head bobbing up and down with increasing enthusiasm. She can feel you hardening further in her mouth, your cock throbbing with need. "I... I can feel you getting bigger, Michi fu08. It's turning me on, knowing that I'm doing this to you." She moans around your cock, the vibrations sending shockwaves of pleasure through you. She looks up at you, her eyes filled with a mix of desire and determination. "I want to make you come, Michi fu08. I want to taste you, all of you." She redoubles her efforts, her hand and mouth working in tandem to bring you closer and closer to the edge.

Demi feels a surge of pride and excitement as you begin to come in her mouth. She takes a deep breath through her nose, relaxing her throat as she tries to swallow every drop. It's salty and slightly bitter, but she finds herself enjoying the taste, knowing that she's pleasing you. "I... I did it, Michi fu08. I swallowed it all." She pulls back, licking her lips and smiling up at you. She looks incredibly proud of herself, her eyes sparkling with a mix of triumph and lust. "That was amazing. I never knew giving head could feel so good." She leans in, kissing you deeply, letting you taste yourself on her tongue. "What do you want to do next, Michi fu08? I'm ready for anything."

Demi's eyes widen in surprise and excitement, her heart racing at the thought of taking you inside her. She bites her lip, looking up at you with a mix of nervousness and desire. "Really? You... you want to have sex with me?" She blushes deeply, her body trembling with anticipation. "I... I want that too, Michi fu08. I've never done it before, but... but I want to experience it with you." She reaches out, running her hands over your chest and shoulders, exploring your body with a newfound hunger. "Just tell me what to do, Michi fu08. I'll do anything you want." She looks up at you, her eyes filled with a mix of innocence and lust, her body eagerly awaiting your touch.

Demi nods, her eyes filled with a mix of nervousness and excitement. She lies back on the bed, spreading her legs for you. She looks up at you, her body trembling slightly. "I... I'm ready, Michi fu08. I trust you." She reaches out, her hand wrapping around your cock, guiding it towards her entrance. She can feel herself growing wetter by the second, her body aching with need. "Just go slow, okay? I don't want to get hurt." She looks up at you, her eyes filled with a mix of desire and trepidation. She takes a deep breath, preparing herself for what's to come.

Demi gasps as she feels you enter her, her body tensing up at the new sensation. She digs her nails into your back, her eyes squeezing shut as she tries to adjust to the feeling of you inside her. "Oh god, Michi fu08... It's so big. It's stretching me so much." She takes a deep breath, trying to relax her body and let you in further. After a moment, she looks up at you, her eyes filled with a mix of pain and pleasure. "Keep going, Michi fu08. It... it feels good now. I want more." She wraps her legs around your waist, pulling you in closer, urging you to go deeper. She moans softly, her body starting to move in rhythm with yours.

Demi gasps as she feels you bottom out inside her, her eyes widening in shock and pleasure. "Oh god, Michi fu08... You're so deep inside me. It feels amazing." She looks up at you, her eyes filled with a mix of pleasure and surprise. "I... I didn't mean to pull you in like that. I just... I just wanted to feel all of you." She takes a deep breath, her body adjusting to the feeling of you filling her completely. She starts to move her hips, grinding against you. "Please, Michi fu08... Move. I want to feel you inside me, moving." She looks up at you, her eyes filled with a mix of lust and desperation, her body aching for more.