John Kellerman: Sisters in heat

His hands caught at the sides of her head. "Robin… go home… leave me alone."

Robin twisted her face free and began to lick his balls. They slid around hotly in the slick sack and she caught the wrinkled skin and sucked one ball into her mouth. It felt weird to know that the spongy nut was packed with her brother's seed and that very seed would be inside her mouth in a little while… if she had the nerve.

She rolled her tongue around, hoping to make him like what she was doing. Steve panted, tried to catch her head again but let his hands fall finally to Robin's shoulders.

"That smell… you… Robin, you smell wild!"

A thrill shot through her belly. She knew she had him if she only could make herself suck the cum from his cock. If she could only milk his heavy cream with her nursing tongue and gulp it down. She shuddered just thinking about it. But she had to try.

She let her tongue-tip trail up the bulging tube that ran along the bottom of his cock. His cock was hot everywhere and when she got to the flared crown she trembled with uncertainty. Then she let her upper lip curve forward, licked it wet and pushed it over the steamy glans.

Steve went stiff in his chair. She dragged her tongue up between the plump lobes at the bottom of the tip. Steve made a funny choking sound. She rubbed back and forth there until the saliva welled into her mouth and seeped down the taut skin of his cockshaft. She tightened both hands on his prick, felt the blood bottled up at the head until the membranes stretched against her teeth, brushed the roof of her mouth. She had that much inside her mouth anyway. But the unfamiliar sensation made her head swim.

A male cock! A prick! Four inches of prick inside her mouth. Thank God it was her brother, thank God she loved him so much.

"Robin… Ohhhh Goddamn it… what are you doing anyway?"

She made a trough of her tongue and bobbed her head straight down until the hot glans was dangerously far back in her mouth. Then she bobbed up again. Up and down, up and down… faster.

The spit oozed from the corners of her mouth. The hot little panting sounded sexy even to herself. And it made Stevie breathe hard too. His thigh muscles were all bulged out and when she rubbed them with her free hand, he almost came unglued.

She massaged his thighs when they disappeared up into his groin and as she rubbed, her fingers accidentally found something else. It was a bulge deep inside his body, just behind the place where his balls were fastened. The bulge pulsed. She rubbed it gingerly, curiously. It throbbed and she could feel the tip of her brother's cock swell huge on her tongue.

She sucked like a hungry little kitten. She made her tongue do circles on his glans and then drove it up and down the bottom of his shaft. She had about two thirds of his cock inside her mouth now, but his prick was so big that she was afraid she was biting him a little. It made her jaws ache, but she kept up the bobbing movements of her head, pretending that Stevie was her husband, that they were alone in their house with no one to bother them ever.

Her panties were drenched with hot cuntjuice. She wiggled her ass to rub the outer lips of her pussy together. The friction over the tiny bead of her clit was intense. She wiggled harder, moaning as she sucked Steve's cock.

Suddenly he lurched forward, his hands tangling in her thick, red hair. A bolt of hot cum spit against the back of her throat and Robin had to fight the impulse to jerk her mouth away from his shaft.

But she squeezed her eyes tight and made her cheeks pull in around his meat as she sucked harder. Steady floods of Steve's cream fountained from the tip of his cock. The taste of his cum was sour, a flat, sour taste.

Robin gulped some down. Strings of semen caught in her throat, but she swallowed again and got it down.

Steve was flopping around in the chair like he'd lost his mind. His thighs were tight around her body. Robin rubbed his balls with both hands now as she worked her lips like slick snakes over the bursting glans.

Her chin dripped cum. Semen escaped from the corners of her mouth. It made a slick coating over her teeth. But she didn't care. Having his cum in her belly only seemed to make her hotter. She took her mouth gently from her brother's prick and let it sag back onto his belly.

There was a knock at the door.

Robin went over shakily arid somehow got it open. The girl with dark hair, the one who wouldn't suck Steve's cock. Robin gave her a questioning look.

"Is Steve here?" The girl looked a little unsure of herself.

"He's here all right." Robin wiped a glob of cum from her chin with the back of her hand. She just didn't give a shit anymore. "He's here, but I don't think he could even get up. Why don't you come back some other time."

The girl frowned. "You look a lot like him, you know that?" She wrinkled her nose as if she had sniffed the sharp odor of semen, as if she knew what the musky smell of Robin's body meant. "You are his sister, aren't you? He said something about red hair."

"Yeah, I'm his sister…" Robin started to close the door.

"Tell Steve to call me." The girl backed off the step. She looked completely confused. "Don't forget."

Robin locked the door and went back in the other room. She sat on the bed, watching her brother. For fifteen minutes he sat there in the chair with his shorts around one ankle. His eyes were closed, but every so often he'd open one and look over at her.

Robin had so many things to say, so much to tell him. But she stayed quiet. It was all she could do to keep from sticking her fingers into her own panties and working her humid cunt into a froth. That sucking had gotten to her bad.

Then she noticed that Steve's cock wasn't sagging between his thighs anymore. It was filling once more with blood, growing thicker and longer. Even the tip was darkening like it had been while she'd sucked it. He had his eyes both open now and was looking at her in a way she simply didn't understand.

He shook his head slowly, smiled. She got up nervously. She clasped her hands in front of her and walked over. She felt like the little baby sister again. She hoped he wasn't mad.

"Take off your shoes," he breathed, touching her hips.

His hands were hot right through her tennis skirt. She kicked off her shoes and spread her toes against the rug. His cock was really stiff now and still a little raw-looking from where her teeth had nipped him.

"We'll probably go to hell for this," he said, his voice so low she could hardly hear him. "Yeah, well probably end up in hell." He stood up and let his fingers slide up her thighs, up under the white pleated skirt. "But… but I can't help that."

He had hooked the elastic of her bikini panties and was working them down over her slim hips.

Robin closed her eyes and moaned when the soaked nylon pulled away from her pubes with a wet, sexy sound. The skimpy things puddled around her ankles and she stepped out of them. Her brother's hands moved over her firm, young ass. His eyes were closed as if he were trying to remember that moment forever.

He didn't have to tell her what to do. They seemed to know exactly what was next, what movements to make. He unbuttoned her shirt, let it slip back over her shoulders. She blushed as he looked at her tits. Why couldn't they be bigger… but maybe someday they would. Especially if Steve sucked them a lot.

He bent down and she hugged her arms around his neck. Then he straightened again and her toes left the floor. He lifted her body up and carried her to the bed. She bounced on the sagging springs with a whimper, spreading her thighs wide, the short skirt flopping back to expose the red meat of her cunt.

"Your cunt looks so wet inside." Steve bent to peer at the parted cunt-hole where she wanted him to ram his lovely, hard cock.