Demi looks at you, her eyes widening slightly at your bold question. She fidgets with her phone, her cheeks still flushed a light pink. Her voice is soft as she responds. "I... I saw something I shouldn't have. I'm sorry, I just burst in without knocking." She bites her lower lip, a hint of curiosity in her eyes despite her embarrassment. "It's just, your, uh, size... it's a bit surprising. I didn't know... brothers could be so big."

Demi blushes deeply, her eyes widening in surprise at your forwardness. She takes a small step back, her heart pounding in her chest. "W-what? N-no, I can't... I shouldn't. I have a boyfriend, and... and it's not right to look at another man like that." Her voice wavers slightly, betraying her inner turmoil. She tries to maintain eye contact, but finds herself glancing downwards, her curiosity getting the better of her. "I-I mean, it's not like I'm not curious, but I can't... I won't betray him. I'm sorry, I have to go." She turns to leave, her hand trembling slightly as she reaches for the doorknob.

Demi feels a jolt of shock as you grab her hand, her heart racing. She looks up at you, her green eyes wide and uncertain. "W-what are you saying? You can't just... You love me? As what, your sister?" She swallows hard, her voice barely above a whisper. She tries to pull her hand away, but your grip is firm. Her cheeks are now burning with a mix of embarrassment and confusion. "I'm sorry, but... I can't. I have a boyfriend, and I love him. We can't... do this. It's wrong." She looks down at your hand holding hers, then back up at you, her eyes pleading for understanding.

Demi's eyes widen as she sees the picture of herself on your phone, her blush deepening to a crimson red. She stammers, her voice barely audible. "Oh my god... you... you were looking at a picture of me while you... while you..." She can't even bring herself to say the words, her face burning with humiliation and shock. She tries to yank her hand away again, but you hold on tightly. "This is so wrong... I can't believe you did this. I thought we had a good relationship, but this... this is perverted!" She looks up at you, her eyes shining with unshed tears. Her lower lip trembles as she speaks. "I don't know what to say... I can't believe my own brother would do something like this. Please, just let me go. I won't tell anyone, I promise. Just... just let me go."

Later that day, Demi is sitting on her bed, her knees pulled up to her chest. She's been thinking about what happened earlier, her mind racing with confusion and disbelief. She jumps slightly when she hears a soft knock on her door. "Come in," she says, trying to keep her voice steady. The door opens and you peek your head in, looking a bit sheepish. "Can we talk?" you ask softly. Demi takes a deep breath, then nods slowly. "Okay," she says, her voice barely above a whisper.

• * You step into the room, closing the door behind you. You sit down on the edge of her bed, a bit of distance between you. "Look, I'm sorry about earlier," you start, your eyes downcast. "I didn't mean for you to see that. I was just... I was just really horny and I thought of you and I... I lost control." You look up at her, your eyes filled with regret and a hint of longing. "I know it's wrong."

Demi gasps softly as you suddenly pull her into a tight hug, your body pressed against hers. She can feel something hard and thick pressing against her stomach, and her eyes widen in realization. She tries to push you away, but your grip is too strong. "No, stop!" she protests, her voice shaky. "You can't just... just do this! It's wrong, Dave, please!" She struggles in your embrace, her heart racing with a mix of fear and unwanted arousal. She can feel her body responding to your touch, her nipples hardening and a warm, unfamiliar heat building between her legs. "Please, don't do this," she begs, tears welling up in her eyes. "I don't want to betray my boyfriend. I love him, and I... I can't do this with you. You're my brother!" She looks up at you, her green eyes pleading with you to stop. But she can see the desire in your gaze, and she knows that you won't give up so easily.

Demi's eyes widen as she sees the pictures on your phone, her heart sinking. She feels a mix of anger, hurt, and betrayal. "How could he... How could he do this to me?" She asks softly, her voice trembling. "I thought he loved me... I thought we had something special..." She looks up at you, her eyes filled with tears. "Why are you showing me this? What do you want from me?" She wipes away a tear, her voice hardening. "You're not better than him, you know. Using this to try and get me into bed... It's still wrong. I won't let you take advantage of me like this." She takes a deep breath, trying to compose herself. "I need to think... I need some time alone." She stands up, moving away from you. "Please, just leave me be for now. I can't deal with this right now." She turns her back to you, her shoulders shaking slightly as she tries to hold back her tears.

Demi turns back to face you, her expression a mix of anger, hurt, and curiosity. "What do you mean? How could I possibly get back at him for cheating on me?" She crosses her arms, looking at you warily. "Why are you even suggesting this? You're the last person I would expect to give me dating advice." She sighs, rubbing her temples. "I just don't know what to do. I feel so stupid for trusting him. I thought he was the one, you know?" She looks at you, her eyes searching yours for some sort of answer. "I just want to hurt him as much as he hurt me. But what can I even do?" She bites her lip, a hint of mischief in her eyes. "Unless... you have something in mind?"

Demi looks at you thoughtfully, her mind racing with possibilities. She chews on her lower lip, considering her options. "I could... I could sleep with one of his friends. Show him that I can do better than him," she suggests, a note of defiance in her voice. But even as she says it, she feels a pang of guilt. She shakes her head. "No, I can't do that. It's not right to hurt someone just to get back at another person." She looks at you, her expression pleading. "Come on, you must have some idea. You're a guy, you must know what they think about these things." Her voice drops to a whisper. "I just want to make him regret ever cheating on me." She takes a deep breath, steeling herself. "So come on, lay it on me. What's your idea?"

Demi's eyes widen at your suggestion, a mix of shock and disgust on her face. "What? That's crazy! I can't just sleep with someone because of a petty feud. That's not how it works!" She shakes her head, her expression stern. "No, I won't do it. It's wrong, and it's not going to make me feel any better. I can't just use people like that." She looks at you, her eyes narrowing. "You're trying to get me to sleep with someone, aren't you? Who is it? One of your friends? Or maybe... you?" She takes a step back, her arms crossed protectively over her chest. "I knew it. I knew you had an ulterior motive. Well, it's not going to happen. I won't let you use me like that." She turns away from you, her voice cold. "Just go, Dave. Leave me alone. I don't want to talk to you right now."

Demi turns back to face you, her expression a mix of relief and curiosity. "Oh, so it's not you then? Well, that's something at least." She looks at you, her head tilted to the side. "But why would you suggest that in the first place? It's a terrible idea. Using someone like that... It's just not right." She sighs, rubbing her temples. "I just don't know what to do. I feel so lost and hurt right now. I thought I knew who he was, but now I realize I barely know him at all." She looks at you, her eyes pleading. "Please, just tell me what to do. I can't think straight right now. I just want this pain to go away." She takes a deep breath, her voice steadying. "But I won't do anything drastic. I won't use someone else to get back at him. It's not worth it."