This story is about a 21 year old girl and her 19 year old brother...
BethAnn walked into her baby brother's room to wish him goodnight. She stopped at the door, as he was lying in his twin bed with his pajama bottoms around his ankles. His rock hard cock was standing straight from his body, his hand fisted around it, slowly stroking up and down the full 7" of it. He hadn't noticed her standing there, completely transfixed, watching as her not so baby brother began to stroke faster. Her eyes followed his hand; up, down, up, down, until finally he began to arch his back and his eyes rolled up into the back of his head. He let out a loud groan and his hand tightened near the tip of his cock as rope after rope of cum shot from the purple tip of his cock. He lay there for a moment, breathing heavily, his hand and chest covered in his white nectar. BethAnn watched as he lifted his hand to his mouth and licked his cum from it, sighing deeply as he relaxed. She was mortified, yet completely fascinated at this sight before her. It had been years since she had seen her little brother naked, and she had never before seen his cock hard. She snuck out the door before he noticed she was there and tiptoed back into her own room down the hall.
She crawled into her own bed and drew the covers up to her chin. She closed her eyes but could not get the image of her little brother stroking his big cock out of her head. She found that her hand had drifted down between her legs and into her own pajama pants, and was pleasantly surprised to find out that she was dripping wet. She knew it was wrong to be touching herself with the image of her brother's cock in her head, but she couldn't seem to help herself. One finger slipped inside her dripping pussy, then two, and she imagined he was sliding into her slowly, tickling her clit with the top of his dick. Her clit was so large and sensitive, she knew that all she needed to do to finish was tickle it just a little. Her heart jumped each time her finger brushed lightly over that sensitive nub. Her breath caught in her chest every time that she saw him cumming, and the video was replaying over and over in her head. She gasped as she could hold out no longer, and broke into the strongest, most powerful orgasm she had ever imagined. As she lifted her fingers to her own lips and licked them clean, she imagined it was his sperm she was tasting.
When she opened her eyes, she almost screamed. He was standing there at her door, watching her. He shifted inside the room and shut the door behind himself.
"I know you were there," he said. "You watched me cum. Then without saying a word, you snuck back here and touched yourself until you came. I've been watching you at night for months now. You are all I think about when my hand is stroking my rock hard cock, Bethie. I know it's wrong, but I can't help myself. You are just so beautiful."
She sat there in silence as she tried to digest what her baby brother was telling her. He had been watching HER! For so many months he had been getting off to the thought of her! She didn't know what to think, and was still in shock when he came up next to her and sat down on the bed. He placed a kiss on her forehead and took her hand in his.