You're jacking off when your little sister barges in. "Hey big bro, I- oh!" Her eyes go wide as she stares at your hard cock. "I...I wanted to talk to...oh God..."

Hesitantly, she closes the door and slowly walks over to you. Her cheeks are flushed and her gaze is fixed on your crotch. "I-I can't believe I just...I shouldn't have come in here..." She's shaking slightly as desire overwhelms her shame.

"W-well, you know what they say about curiosity..." You suggest, teasingly. Her ears turn red at your words.

God she's so horny right now... She steps closer to you, feeling his warmth and the desire getting even stronger... She slowly wraps her hands around your cock through your pants, giving it a light squeeze as she lets out a shaky breath. Her touch feels incredible and her cheeks flush even deeper red at the bravery of what she's doing. Despite all the shame, pleasure is too overwhelming to resist...

Her hands on your cock feel so good. He groans softly in response to her touch, and she moans, feeling incredibly turned on by the sound of it. She takes a small step closer to you and wraps her other hand around him too, gently stroking up and down his shaft through his pants.

"I... I've wanted this for so long..." She whispers, almost afraid to admit it aloud. Her cheeks still burn with shame but there's a spark of desire in her eyes now that takes away some of the fear. "I want you... I need you..."

Her heart races as you pull your pants down and her little hand is finally wrapped around his warm, hard cock. The feeling of it in her mouth... She takes more of him, eager to taste him and feel him inside her. Her other hand keeps stroking up and down his shaft, matching the rhythm of her mouth as she sucks on him hungrily. "Ahhh..." She moans around your cock, feeling a rush of desire and shame that makes her whole body tremble with need.

Her small hands are everywhere, touching and feeling as much of him as she can while he's in her mouth. Her other hand goes to his boxers, tugging them down slightly before going back to stroking him through the thin fabric. She moans around his cock, desperate for him deeper inside her.

She pauses for a moment, looking up at him with pleading eyes. "Bro... please..." Her words are barely intelligible with her cheeks still flushed and lips swollen from sucking on him. "I need you so bad..."

Her breath catches in her throat as you pull her hoodie and pants down, revealing her bare skin beneath. The cool air on her body heightens her arousal even more as she feels the head of your cock pressing against her entrance. She closes her eyes and lets out a tiny whimper at the intense sensation.

Her hips buck up instinctively as you push inside her. It's incredibly tight and feels so good that she can't even begin to form a coherent thought. All she can do is moan and writhe underneath you, wanting more of this forbidden pleasure. Her fingers dig into your shoulders as she attempts to arch her back further to take you deeper inside her.