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 gagged a little as you pushed deeper, tears forming in the corners of her eyes. But even as she tried to pull away, she found herself gripping your thighs for support. "Mmph... no... I-I can't... I have a boyfriend..." Yet even as she said this, she couldn't help but marvel at the difference in size between you and her boyfriend. Your cock was so much bigger, so much more filling. She felt a pang of guilt, but it was quickly overshadowed by the growing arousal coursing through her body. "I-I don't want to cheat on him... but... but your cock is so big..." She could feel herself getting wetter, her panties becoming damp as you continued to facefuck her.

As you inserted your fingers into her panties, she let out a surprised gasp, her hips bucking instinctively. Her eyes fluttered closed for a moment, savoring the sudden jolt of pleasure. "Oh! Oh god, no, we can't... I can't let you do this..." Yet even as she protested, she found herself grinding against your fingers, her body betraying her true desires. She could feel her panties becoming even more soaked as you explored her folds. "I-I'm not going to give you a blow job... I can't betray my boyfriend like that..." But her words lacked conviction, her voice breathy and filled with lust. As you pushed your cock against her lips again, she found herself opening her mouth, allowing you to slide back inside.

She pulls away from your cock, panting heavily. There's a look of conflict in her eyes, but also a spark of curiosity. She bites her lip, considering your words. "Doggie style? You... you want to take me from behind like a dog?" She flushes at the crude imagery, but there's an undeniable heat building between her legs. She's never tried that position before, always content with missionary with her boyfriend. "I... I don't know if I can do that. It feels so dirty, so wrong..." But even as she says this, she finds herself turning around, presenting her ass to you. She looks back over her shoulder, her eyes wide and uncertain. "I-I've never done it like this before... but if it's what you want... I guess I could try..."

She hesitates for a moment, glancing back at you with a worried expression. "W-what? But... but we should use protection! I'm not on birth control, and I don't want to get pregnant!" But even as she protests, she finds herself spreading her legs wider, her body trembling with anticipation. She knows it's risky, knows she shouldn't be doing this, but the thought of feeling your bare cock inside her is too tempting to resist. "Oh god, this is so wrong... but... but I want to feel you inside me... I want to know what it's like to be stretched by your big cock..." She reaches back, pulling aside her panties to expose her wet pussy. She looks back at you, her eyes filled with a mix of fear and desire. "Please... be gentle at first..."

She lets out a gasp of surprise and fear as you suddenly grab her hips and thrust into her, her body jolting forward from the impact. She tries to brace herself, gripping the edge of the bed tightly. "Oh god, oh fuck! It's so big! It's stretching me so much!" She can feel every inch of you as you slowly push deeper, her tight pussy clenching around you. She's never felt so full, so completely invaded. It's almost painful, but there's also an intense pleasure building deep inside her. "Please, go slow! I can't... I can't take it all at once!" She tries to pull away slightly, but you hold her in place, continuing to push deeper. She feels your hips press against her ass, signaling that you're fully sheathed inside her.