From peeking through the doorknob, Nick watched his little sister chat on a phone in her pink bedroom while laying on the bed. One of her hands was rubbing across her stomach, like a bitch in heat.
He stuck his hand in his sweatpants, grabbing the girth of his cock, and started watching some more, studying the perfect curve of her complexional slim outline. She was an eighteen years old who looked to be a sixteen years old, younger-looking because of her petite size, weighting around at least a hundred pounds with a height no more than five feet.
Nick felt an erection forming as he observed her a little more, yearning for the impossible. Her wild brunette hair was thrown down her back as she rolled over on her bed, bright blue eyes gleaming with sparkles, revealing a bod of a professional gymnast. Muscular across the thighs, blessed with a bun of steel, slender down to the waist, but somewhat tender in appearance. She was wearing just her black silk underwear with a large T-shirt as a pajama, resting flat on her stomach as she gossiped on the phone.
Her name was Sophia.
Nick jerked his rod harder, stifling his groan to a quiet moan, and panted. He fantasized fucking her from behind, bringing her to a screaming climax. This was the third time this week he ever done this, spying on his little sister while masturbating like a sex-crazed psycho.
It had started as an accident two nights ago when he caught the door ajar and found Sophia undressing, exposing just a little of her nakedness to his whim. But since their parent were home, Nick had to run into his own bedroom and jerk the urges off his system. Last night he took the risk while his parent were sound asleep across the hall, pumping his cock while staring at his own sibling.
But tonight was special.
Fuck it, he thought, jacking harder. If I can't have her, I might as well daydream about fucking her. His cock was a hot weapon right now, crying for a fix. And both mom and dad were out to a cocktail event, leaving the entire night to his own. He watched her giggled, sprawling her legs apart as she rolled again. This was it. He felt a tinkling sensation running down his spine as a spurt of cum splattered the door. But the impact hit the door so hard that it squealed opened, revealing Nick with his pant down.
Sophia caught him standing there, wide-eyed, wet cock gripped in his hand, and gasped. She dropped the phone and stared, mesmerized.
"Nick?"
"Oh, shit. It's not what it look like!"
She still watched his cock like it was something from outer space, amazed and enthralled at the size. "Were you . . . watching me?"
"No, I wasn't!"
Sophia stood from the bed, her long dark hair dropping down her waistline, her eyes appearing unconvinced from his denial.
"No? But there's cum all over you." Through the haze of confusion, Nick couldn't think of anymore excuses. You got me, he thought, and he was proud she was goggling at his well-hung cock. He knew he was busted in a worst, most embarrassing scenario possible. But his little sister displayed no disgust except there was a kind of strange curious excitement written on her face. She walked over to the door of her room, examined the stains on the wall, and shut the door.
Then she locked it.
Nick felt his heart paced as Sophia turned around in her seductive movement, an unusual thoughtful smile cresting on her angelic face. "So you like watching me?" she said, stepping back in amusement, admiring her own brother. "What a pervert you are. I like that."
Nick was speechless, too stunned and confused to respond. The phone rang but Sophia paid no attention to it. Then, after it died, she stepped forward and shoved him to the floor. Nick fell on his back against the carpet, feeling it was a painless fall, and watched his sister dropped on her knees on his side, her delightful eyes on his well-hung cock. Total lust was driven in her blue eyes.
"I have a confession to make," she said, leaning over him, breathing to his ear. " I'm a virgin and I'm sick of being one. But I'd do anything to have you fuck me. Anything. And I know you want to. "
"Cripes, you're fucking with me."
"No, but you'll know when I'm fucking with you." She straddled him, allowing her ass to press against Nick's cock but with a subtle weight on him. "Because if you don't fuck me tonight, then I'll tell momma what you did tonight."
"Bullshit, Sophia, you're full of-"
"It's no bullshit, big brother. I'm eighteen years old, still a virgin because Dad never let me go out, and I want you to fuck me." She started to ride him with a moaning sound, deliberate in her motion.
"But, Nick, I want you to fuck me hard. Hurt me. Rape me, if you like. I read about it in books. I've seen those rated-X movies. I want you to do me in all sort of positions, just like those porn stars. I want a man like you to make me into a woman. I need the experience."
Fingering her mouth, Sophia didn't express a single sign of regret about her confession. Not a hint at all. Instead she leaned forward and sank deeper into his crotch. From just seeing this, Nick dick was surging again, full-flank and hard. The veins started to pulse and it was obvious he was turned on again. He could feel his erection, his eight-inch cock growing against the surface of her cunt, breathing faster, not able to believe this.
Sophia sensed this and pressed down just a little more, wanting to feel her brother in her. But it was her underwear that safeguarded their path to a world that could result pure madness of unnatural breeding. After a moment of tension, Nick couldn't take it anymore.
"Then you're going to get your wish, tonight," he said at last, thrusting his cock right into Sophia's vagina, ripping through the black fabric and surging into a wet, tight hole. She gasped, her eyes an arousal shock of pain, and cried out. He was looking in the eyes of a girl who was about to become a woman and lose her innocence from an incestuous fuck.
