"Then get down on the floor."
She felt her knees give out under her as she sank down onto the bath mat. She spread her legs and for a moment Billy gazed down at her pussy.
She wore a short skirt and no panties and her pussy aroma was strong in the small bathroom. Billy struggled to breathe as he hovered over her. The pink lips of her cunt winked open in invitation. The light sprinkling of dark hair made him groan with raw desire.
He'd seen a few pussies in magazines and one of his girlfriends once showed him her cunt. But his balls ached as he moved down over his sister to touch the vulnerable-looking slit between her legs.
As he touched her cunt she reached for his cock. Her eyes were wild and glittering. She wanted his cock inside her breaking her cherry and bringing her off.
"Hurry!" she said. "I'm so hot!" The floor was like marble on her back, but it didn't matter. All that mattered was having his prick inside her.
The boy muttered as he fell over her. His cock wedged between her round thighs, missing her cunt, but hitting her hairy mound.
"Stick it in," he said.
"I can't, you stick it in!"
"What if I hurt you?"
"You won't hurt me."
"But your cherry."
"Will it hurt?"
"I think so."
"Oh, God, I don't know…"
She tried closing her legs, but it was too late. Billy held his prick against her cunt and tried pushing in.
"Let me stick it in," he said.
"Can you do it?"
"Yeah, if you stop wiggling around."
She lay perfectly still. "I'm not moving," she said.
He pushed forward. Her cunt felt hot and wet on his cockhead. He shut his eyes and grimaced. Just the feel of her gash on his cockhead made him want to let go and come.
"Don't hurt me," she said.
His heart pounded with passion, but he hesitated. "Jesus, Sis, you're a cherry. It's bound to hurt." How he wanted to feel her pussy wrapped around his cock!
She pulled her knees back to her tits as his cockhead lodged between her cuntlips. "Push it in!" she whimpered, wrapping her arms around his neck.
He lurched forward, driving his prick into her virgin snatch and ripping her hymen. "We're fucking," he said.
"Is it in?" she said, relief flooding her. It didn't hurt a bit.
"Sure, it's in. Jesus, your cunt is tight."
Neither youngster had to be told what to do now. Their bodies took over and Billy began pumping his cock in and out of her swampy depths.
Penny was in heaven. With every thrust his cock seemed to rub against her clit. Her clit was sensitive from years of masturbating, but she'd never felt anything like this. Having a cock inside her was the most thrilling thing to ever happen to the teenager.
"Your cock is rubbing my clit," she breathed.
"Yeah, do you think you're gonna come?"
"If you can do it long enough I will. Oh, God, Billy, I love fucking! Don't you?"
"Yeah, it's great." He pushed in very deeply, causing his balls to slap her asscheeks.
"How many times have you done it?" she said, her teeth chattering with excitement.
"I don't remember."
"Oooooooooh, I feel so filled up with your cock."
"Jesus, your pussy's grabbing my cock."
The pulsating bar of male meat inside her stretched her insides deliciously. Everything felt wet and tight and wonderful. She had never oozed so much juice from her cunny. His cock, big as it was, streaked in and out with ease.
"We're really fucking," she said.
"You better not tell," he said.
"I won't. Oh, God, Billy, keep doing that!"
"I don't know how long I can keep it up."
"I just love it."
"Me too."
They were both perspiring freely. His belly slapped hers and at one point she raised her legs and wrapped them around his back. Each time he thrust into her, she came that much closer to coming.
The little brunette had never felt so turned on. This was so much better than masturbating. Her body felt alive and tingling and urgently in need of release. Her orgasm was a hairsbreadth away and when it came she knew it would be intense.
"Fuck me, Billy," she moaned.
"Jesus, you drive me crazy when you say that."
His cock rammed into her. "Fuck me hard like that," she cried.
Her pussy gripped his prick and her words inflamed him. The fire in his groin became almost unbearable. Clenching his teeth, he held his breath in an attempt to delay his orgasm.
"A man is supposed to satisfy a woman first," his father had said to his sons when they began developing sexually. "A real man never comes until the woman is ready. Remember that, boys, and you'll be okay."
Billy remembered his father's words now. "I'm ready, are you?" he said to his sister.
"Yeah, almost," she said. "God, you're in so deep."
"Tight snatch!" he muttered, pounding her cunt with every ounce of his strength. "Such a tight snatch!"
He forgot his father's teachings as the fire in his loins erupted. "Gonna tear you apart," he rasped.
"No!" she shrieked. "Don't hurt me!"
He stopped thrusting. "Jesus, I'm sorry, Sis! Should take it out?"
She tightened the grip of her legs on his back. "No. Fuck me hard again. I'm going to come soon."
She tossed her head from side to side as the glory of her orgasm surged through her. Billy groaned, gazing down and watching her ecstatic face.
"I'm coming, Sis!" he cried, stabbing his erupting prick into her spasming cunt.
The girl cried out when the first spurt of jism exploded inside her. His cock streaked in and out of her, drenching her and bringing her off again. At the end he thrust more slowly, shivering and shaking as his orgasm abated.
They lay together on the bare tile floor. Somewhere along the way the bath mat had become wadded up. Penny's skirt was bunched up around her waist and her blouse was open. Her tits were out, heaving up and down as she struggled for breath.
Billy's weight was heavy on her, but she wanted him to stay inside her. Even though his prick was limp it still felt good to the horny teenager.
Penny was the first to recover her breath. She hugged her brother to her breast. "Can we do it again?" she said.
He lifted his head, groaned and dropped his face down to her tits. "Jesus, Sis, a guy can't do it again right away. A guy's got to rest before his cock gets hard."
"Is there anything I can do to help?"
Billy raised his head and grinned. "Jesus, Sis, you're too much."
Dropping down, he nuzzled her tits with his lips. She felt his cock stir inside her and hugged him.
"Well, I guess I'm not a virgin any more," she trilled.
He sucked her nipple into his mouth. Me either, he thought. Jesus, we're neither of us cherries any more.
CHAPTER FOUR
The next few weeks passed slowly for Pam. She lived in a permanent state of horniness. Chuck bored her and her pussy ached for new adventures. But her mother kept admonishing her to be chaste even while she brought her own lovers to the house.
Then one day when Pam dropped in at her brother's house she found him home alone. Judy and the children were out for the day. This was her perfect opportunity to talk to Bob about her problems with their mother.
As they sat in the den and chatted, Bob made them both drinks. They spoke openly and honestly about Pam's troubles. Bob advised her to move out and get her own apartment. Pam promised she'd think about it.
The scotch filled her with a warm glow. After an hour she forgot about Maggie and her thwarted sex life. Then suddenly she became aware of Bob's leg pressing her thigh and the warm glow spread to her cunt.
It seemed like a harmless gesture. Bob had never made a pass at her. How could he? He was her brother. And yet, why not? Who could say how many siblings engaged in incest.