Chapter 1

The teenage boy began beating his meat more rapidly. It felt good to get it hard and then blast off. He was working up to a good blast when the door opened and his kid sister entered the room.

He quickly released his prick. It jerked back wildly, hitting him in the belly.

"Jesus Christ, why can't you knock?" he hissed.

The girl was wearing a shortie nightgown and her well-developed tits showed through the thin fabric.

"You're awake, aren't you?" she said as she closed the door and tiptoed across the room to his bed.

He quickly covered himself up. "Yeah, I'm awake, but you ought to knock first."

Robin, a cute blonde with a round ass, sat down on the edge of his bed.

"Turn the light on," she said. "I wanna talk."

"What about?"

Billy, only a year older, tried hiding his hard-on under the covers.

"I couldn't sleep." The little blonde curled up next to her brother, sharing his pillow. "I've been feeling funny lately."

Billy's hard-on twitched violently. When Robin stretched out next to him, her tits wobbled and her thigh touched his.

"You really shouldn't be doing this," he said.

The girl blinked. "Why?"

"Because we're getting too old."

Robin blushed. "Were you jerking off before? Is that why you're trying to hide your thing?"

"It's not a thing. It's a cock."

She grinned. "Were you trying to hide your cock?"

Billy snickered. "Yeah."

She gazed at him accusingly. "Well? Were you jerking off?"

"What if I was?"

"It's gonna fall off some day."

"Don't be an asshole."

"Can I see it?" Her eyes were wide with excitement. "You promised I could see it some time."

"Aw, Sis, don't bug me."

"Is it as big as Daddy's?"

"When did you see his?"

"I saw him getting out of the shower the other day. He left the door open. Anyway, I've seen his cock plenty of times."

Billy thrust his jaw out. "Yeah, it's as big as Dad's."

"Honest? Is it hard right now?"

"None of your business. Listen, you came in here to talk."

"But that's what I want to talk about. I've been feeling real funny down there."

She pointed downward, at her pussy.

By now Billy's hard-on was only a pleasant memory.

"You're developing," he said, trying not to stare at her tits. "That's why you feel funny down there."

"Yeah, I know. Sometimes I have to change my panties a million times a day. They get so yucky."

"You mean because your pussy gets wet?"

She giggled. "Yeah. Especially when I touch it. And I feel so funny. I mean my pussy really tingles."

Billy clenched his fists under the covers.

"You better go back to bed, Sis. We're getting too old to talk like this."

"But we're best friends." The little blonde frowned. "You always said we were best friends and just because we're getting older is no reason for us to get all uptight."

"You know what Mom said about sex and controlling yourself and all that."

"Oh Mom! She's part of the older generation."

Billy's eyes kept returning to his sister's chest. The swell of her tits was making his cock hard again. The feel of her soft thigh against his was making breathing difficult.

"I guess you're right about Mom," he said.

"What else did you want to talk about?"

Robin stared at his crotch under the covers.

"Can I see your cock, Billy? Please, can I see it?"

"Why do you want to see it?"

"I like cocks. I don't know why. I just do."

"You're just horny. Go to bed."

The little blonde giggled. "It looks like we're both horny. Come on. Mom used to bathe us together. It's not like I never saw it."

"Mom would kill us if she knew you were in here."

"Aw, come on. Aunt Lesley and Sarah will be here in a few days. Then we won't be able to talk like this anymore. You'll be following Sarah around like you always do. I don't know why you like her so much anyway."

Aunt Lesley was their father's younger sister. Every time she and Uncle Pete had a bad fight, she brought her daughter Sarah and moved in with the Harrisons. Sometimes they stayed a week and sometimes a month. Once they stayed the whole summer.

"She's fun," Billy said now, holding his hands over his crotch to hide his hard-on. "And pretty."

"I like Sarah too," she lied, "but when they get here we won't get to talk as much. Come on, Billy. Let me see your cock. Just once."

"Yeah, what'll you show me?"

Billy's words hung in the air. Robin stared at him.

"Do you wanna see my pussy?" Billy averted his eyes. "Sure, why not?" "Hmmmm, I guess it'd be okay." "You'll let me see your pussy?" Billy's eyes glittered.

Robin smiled demurely. "It's only fair."

"Okay." Billy threw the covers back, revealing his prick.

"You're not wearing anything." The girl's eyes widened. "Wow! It's big, but not as big as Daddy's."

Billy gazed down at himself, frowning.

"It's not real hard yet. My cock gets a lot bigger when it's real hard."

"It's twitching!" The girl couldn't take her eyes from her brother's prick.

Billy smirked self-consciously. "Not bad, huh? I'll bet it's a lot bigger than you remember."

Robin bent down, bringing her face closer to the boy's upthrust cock.

"Yeah. I'd sure like to see your cock when it's real hard. How big does it get?"

Billy grinned proudly. "If you wait around a while, you'll see. Want to watch me jerk off?"

"Could I?"

"Maybe. You sure the folks are sleeping?"

"Yeah, they turned off the light ages ago. Can I really watch you jerk off?"

Billy hesitated. "It feels better when a girl does it."

"You'll let me touch it?" Robin squealed as she rolled onto her belly and made a grab for his cock.

"Take it easy, Sis. You've got to treat a cock gently."

"Wow!" She gave his prick a loving squeeze. His cock-skin was so soft and velvety. She liked moving his cock-skin around.

"Pull it back and forth like that." He guided her hand. "If you pull just my cock-skin, it feels real good."

"Does it feel better than when you do it yourself?"

"Yeah, sure. Remember, easy does it!"

"It's twitching!"

"Sure. My cock jumps around when I get excited."

The horny little blonde giggled. "Your cock's kind of throbbing now!" "It's getting harder. Keep doing that. Squeeze it, too!"

Robin's pussy moistened as she pumped her brother's cock. She stared at his cock-head, at the drop of moisture oozing from his cock-tip. His cock was big. Almost as big as their father's.

"It's sort of standing up by itself," she said.

"Yeah, I know."

"What does it feel like? What does it feel like to have a hard-on?"

"I don't think I can explain it. Just move my cock-skin. Don't pump so hard! Yeah, just the skin!"

He trembled as she beat his cock-meat. The little blonde changed hands. She moved his cock-skin up and down his throbbing cock and dabbed a fingertip over his piss-hole. She had never been more excited. She stared at his piss-slit.

"It's funny. Your piss and your jism come out of the same hole!"

Billy's face was flushed. "Jesus, what a dumb thing to say."

"Well, it does. Can I watch when your jism squirts out?" "Maybe," he croaked. "You're doing a pretty good job!"

"It's bubbling out. Wow, it's thick!"

"It's not really jizz. It's just the gunk that leaks out when a guy gets excited."

"Sort of like the stuff that comes out of my pussy!"

"Yeah."

"My pussy's leaking right now!"

"Then you're excited too."

"Sure. I was horny when I came in here. I'm getting hornier, the longer I jerk you off!"

"Let me see your pussy," Billy said in a tight voice. "That's the deal, remember?"

"What if the folks find out what we're doing?"

"They better not! They better not find out. I won't tell!" "Me either."

She abruptly released his cock. "Jesus, Sis, you're gonna show me everything!"

The blonde was busily removing her nightgown.

"Sure. I want you to see me." She giggled nervously. "Isn't my body pretty?"

"Yeah!"

Billy's cock throbbed wildly as he gazed at his sister's naked body. It was pretty. As sexy as a centerfold. Her tits weren't real big, but they were nice and round and her nipples were long and stiff.

Robin turned her back and tossed her hair over one shoulder.

"Don't forget my ass!" she giggled. "Isn't it cute?"

The horny teenaged boy licked his lips again and again. "Yeah, it's cute."

Robin was enjoying herself immensely. She let her brother examine her from every angle. When his eyes finally dropped to her pussy, she stretched out next to him, and let her legs fall open.

"You can see everything now," she said, closing her eyes as he stared at her cunt.

"Yeah, I sure can." Eyes glazed, he examined the blonde cunt-bush between her legs and the pink cunt-folds peeking out between her outer cunt-lips.

Robin suddenly opened her eyes.

"Can you see how wet I am?" she said. "Pussy-juice is just oozing out of me!"

"I can see it!" Billy grinned. "You've got a pretty pussy!"

"You can touch it if you want."

"Was that part of the deal?"

"Sure. You want to touch it, don't you?"

"I guess so." He grinned nervously.

She shivered and squirmed when he reached out and touched her.

"Wow, that feels funny!" she said.

His fingers barely grazed her cunt-bush. She held her breath when he gently stroked her golden cunt-curls.

"You can rub it!" she whispered sexily.

"Should I jerk you off?" The boy's voice was thick.

"Sure."

Robin knew he was very excited. It turned her on to know her big brother was responding to her sexually. I'm a woman, she thought with a rush of excitement. Well, almost anyway.

"Can I kiss it?" he said.

"You want to kiss my pussy?" The little blonde was both frightened and delighted.

Billy nodded gravely. "I'll kiss it if you kiss my cock afterward."

"Wow, I don't know."

Billy quickly realized he had gone too far. "What about if we french-kiss while I play with your cunt?"

"Okay, we can do that." His fingers playing lightly over her cunt, the horny teenager pressed his lips to hers. Robin trembled.

"Wow!" she breathed, aware that his tongue was moving into her mouth.

"Didn't you ever french-kiss before?"

"Yeah, sure," the girl lied. "Lots of times."

"Well, you've got to stick your tongue in my mouth too. And suck on my tongue. That's french-kissing!"

Robin was certain that her brother was also inexperienced. But a wild thrill surged through her as he fondled her pussy and plunged his tongue into her mouth.

"Am I doing it right?"

She tentatively slipped her tongue into his mouth.

"Yeah! Your tongue is nice and soft. It feels good. Mmmmmm, yeah, move it against mine! That's good. Jesus, my cock is getting harder!"

"Ooooohhhh!" Robin moaned as Billy wormed a finger into her cunt.

"I'm finger-fucking you!" he said, flicking his tongue in and out of her eagerly sucking mouth.

"I know," she said breathlessly. "I can feel it! Your finger is fucking me! Does that mean I'm not a virgin anymore?"

"Don't be an asshole! It's not my cock! It's only a finger!"

"It feels almost like a cock."

"How would you know?"

"I just know. You're breathing hard!"

"So're you."

"Do it faster, huh? Move your finger in and out faster."

"I'm not hurting you, am I?"

"No. Wow! Put another finger in. Yummy! That's even better. Now it really feels like a cock!"

The siblings continued french-kissing as he frigged her. He thrust his fingers in and out of her cherry cunt with rapid forceful thrusts.

The teenaged girl creamed all over his hand and wrapped her arms around his neck. She had never felt like this before. Her pussy was ready to explode. If this was what it felt like to fuck, she couldn't wait to lose her cherry.

"Is this what grown-ups do?" she moaned. "Oooohhh, you're making me almost come!"

"Grown-ups do a lot more, Sis. They use their mouths, like I said. And they fuck! This is kid stuff."

"It feels pretty good to me."

"Me too." He took her hand and placed it over his prick. "Pump my cock again. Bring me off, Sis! Jesus, not so fast. I wanna have time to enjoy it!"

But Robin wasn't thinking about her brother's pleasure. She was too overwhelmed by the feelings surging through her virgin body.

She had masturbated regularly for years and she knew what it felt like to come. But this was different. Having Billy's fingers inside her cunt while they french-kissed was much more exciting than jerking off alone.

Now she frantically arched her back and rammed her pussy at Billy's stroking fingers. As her passion increased, she had a strong desire to have his cock inside her. His fingers felt good, but not good enough. She ached to have his cock streaking in and out of her cunt.

And then she came, legs falling open and shrieking as the ecstasy engulfed her young body. At the same time she squeezed Billy's cock so hard he came too.

His jism shot into the air. One wad hit her tits and another struck her eye. When she wiped it away from her face, she couldn't resist tasting it. It was salty and bitter, but the horny teenager rather liked it.

"Oh, shit, what a hand-job!" Billy muttered with one last shiver.

"I came real good too!" Robin panted.

They stretched out together to rest.

"What does it feel like when you come?" Billy said.

"I can't explain it. What does it feel like for you?"

"I can't explain it either." There was a moment of silence.

"Wanna do it again?" Robin giggled.

"Sure."

"Cross your heart you'll never tell?"

"Cross my heart!"