But after their fuck session was over, Donna felt guilty about her desires. Incest was wrong. Bobby had to learn the pleasure his enormous dick could give to girls his own age. Donna vowed adamantly never to touch his cock again.
But it was a difficult promise to keep. His big sister had popped his cherry, and for the duration of his visit Bobby was after her for another fuck day and night.
He tried to crawl into bed with her after Roy left for work in the mornings, and when she was trying to catch up on her housework he would try to dry-hump her in the afternoons. Sometimes it didn't even bother him that his sister's husband was round. Several times Donna had to push away an overly-fresh hand creeping up her thigh while they were at the dinner table.
Bobby quickly gathered how much his sister was excited by his ten inch cock, and he proudly showed her his stiffened manhood every chance he got. Donna would turn a corner and find him naked in the middle of the hallway, groaning as his pistoning fist jacked off his dick. Once, when she decided to take an afternoon nap, she discovered that he'd beat his meat and creamed all over her sheets.
These innocent attempts at seduction quickly took their toll on her willpower. If Donna had been an unusually horny girl before, now she was like a bitch in heat. Every time Bobby made a pass at her, and she refused him, she would have to run off and finger-fuck her pussy to one shuddering climax after another.
His gigantic dick was constantly on her mind. Donna had never seen a cock as large as her brother's, and in spite of herself she longed to see, feel, fuck and suck it. Every daydream she had was filled with images of Bobby's stiff, spurting hard-on.
In turn she unconsciously wore more revealing clothes when he was around. There was a certain sadistic pleasure in watching her kid brother drool as her big tits jiggled under a sweater without a bra, or seeing his crotch bulge as her long legs flashed under a miniskirt before his hungry eyes.
Finally, only a few days after their first, torrid fuck session, the mutual desire between brother and sister reached a boiling point. Bobby had been parading around the house with a hard-on all day. A little after noon, Donna realized she had to go into the bathroom and jerk off.
"Come on, let me take a shower with you!" Bobby pleaded, following her as she rushed down the hallway. "It wouldn't hurt anything!"
"Forget it, buster." Donna stepped into the bathroom, then shut and locked the door behind her.
"I know what you're gonna do in there!" Bobby yelled angrily through the door. "You're gonna beat your meat! I make you horny and you know it!"
"No I am not!" Donna lied. "And it doesn't matter if you make me horny! You're my brother! I can't fuck with you again. I should never have… it's sinful. Besides, my husband would kill us both if he found out! So leave me alone!"
Bobby grumbled a few choice obscenities and walked away. Donna waited until she heard his footsteps on the stairs. Then she turned on the shower and stripped off her clothes as fast as she could.
She was horny, incredibly horny, practically burning up with her need for a good, stiff fuck. Donna kneaded her big tits as she bared them, whimpering as the nipples stiffened under her palms. Her cunt was so wet that her pussy hairs were stuck to her panties. Donna ripped them off and sighed as she felt the tingling pulsations in the inflamed lips of her cunt.
The shower water was warm now. Donna stepped into the stall and kicked the door shut. Leaning against the tiled wall, she spread her legs wide and mewled with satisfaction as her fingers pushed through her glistening pussy curls, diving into the sopping slit of her cunt.
Fuck me, Bobby, she thought as she began to jack off her pussy, darting her fingers into her cunt as she rubbed her clit with her thumb. Her asscheeks contracted, imitating the humping motions of fucking. Her mind was filled with images of her brother's thrusting, spurting cock.
Your big, hard dick, Bobby, oh yes… going into me now… in my juicy little cunt. Doesn't it feel good, Bobby? Don't I have a nice, tight little pussy? You can fuck me now, Bobby. Yes, I've given up. I can't resist your big cock any longer. You can fuck me just as long as you like…
The shower stall door flew open. Donna was too horny to take her fingers from her cunt. Her eyes bulged as her now-naked brother joined her under the spray, with his ten inch prick bobbing stiffly before him.
"I knew you were in here beating meat," Bobby said. "Too bad you forgot I had a key to the bathroom door. Or maybe you forgot on purpose, if you know what I mean."
Bobby pressed close to her before she could react, wrapping his hands around her enormous tits, thrusting his hips forward so that his drooling, jerking dick head pushed onto the hairy triangle of her cunt. Donna gasped as she realized that he was trying to fuck her standing up.
"No, Bobby!" she cried, making a feeble effort to get away from him. "God damn you, you know you shouldn't have come in here! Oh God, why can't you just leave me alone?"
But Bobby had caught her at her horniest moment, and both of them knew it. Giggling confidently, the boy lowered his head to her ample cleavage and began to suck her tits, gluing his lips to her large, dusky pink nipples. Donna grunted and shamefully squeezed her thighs together to rub her cunt.
"Yeah, you want to get laid, all right. You want it and you know it." Bobby released her tits and slid slowly to his knees, planting wet kisses on her belly. "And this time I'm going to make sure you're too horny to do anything about it."
"No, Bobby." But Donna's words were without meaning as she fought the pulsing heat growing in her cunt. "Unghh! Please don't… oh no… noooooo!"
With her cunt triangle only inches from his face, Bobby knelt on the tiled floor of the stall. His hands moved up his sister's soft thighs and clenched the peach-shaped cheeks of her plump ass. Then he bent his head and started licking her pussy, running his tongue up and down the bright pinkness of her slit.
"Ungghh, oh Bobby, unggghhh…" In spite of herself Donna moved her feet farther apart on the floor, spreading her legs so he could go to work on her cunt. "It's incest, it's wrong, oh noooo…"
"It tastes good, sis," Bobby groaned. "I never ate out a cunt before. Shit, I could suck on your pussy all day."
Repeatedly he rolled and kneaded her creamy-white asscheeks, making her asshole pucker as the heat throbbed through her cunt. Bobby ground his face all over her hairy pussy, staining his cheeks with her musky fuck juices. He extended his tongue and lapped her cunt like a hungry animal, thrusting it deep inside her aching fuck tunnel.
"Ungghh! Oh yes, oh Bobby! Oh ohhhhh!"
Donna gave in. She'd done everything in her power to curtail her brother's desire. Now she no longer felt responsible for their sin.
She splayed her thighs as wide apart as she could, opening up her cunt for the invasion of her brother's tongue. Her back arched, grinding her pussy onto his mouth. Donna grabbed the back of his head and pumped her asscheeks in the driven rhythms of lust, fucking her cunt all over his face.
"Okay, Bobby, you can suck me," she whimpered. "Go ahead and eat out my snatch. Oh fuck, you make me so horny! Lick my cunt!"
Bobby sighed as he was enveloped by the musky aroma of pussy. Sliding his hand from her shivering ass, he pushed it up her leg until his fingers touched the swollen, pouting lips of her fuck hole. Bobby thrust two fingers into her pussy and started to jack off her cunt as he sucked it, wiggling his tongue closer and closer to her clit.
"Unggghh!" Donna's big tits shook as she humped her ass harder. "Suck it, Bobby! Oh Jesus, you're really doing it now! Get my clit, oh fuck, suck on it hard! That'll make me come!"
Bobby had never tongued a woman's pussy before, but he was eating out his sister as if he'd been sucking cunt all his life. His lips closed around her stiff clit, drawing it out of its protective hood. As she writhed in the delicious agony before orgasm, he finger fucked her pussy and sucked her pussy deliriously, flicking his tongue on the ultra sensitive clit.
"Coming! Christ, oh suck, Bobby, suck my cunt haaaard!" Donna screamed and locked her hands behind his head feverishly fucking his face as the spasms of coming burned through her pussy and drenched his face with her fuck juices.
She came for what felt like minutes, flushing and wincing obscenely as the climax ravaged her pussy again and again. Bobby had sucked her cunt so long that the shower water had started to turn cold, but Donna didn't notice. When the cum finally subsided she slumped exhausted against the wall and smiled gratefully into her brother's eyes.
"That was so good Bobby. I guess I'm glad I gave in to you. I should have known we couldn't help ourselves. I just pray my husband doesn't find out. He'll kill us. I wish I could explain that I can't help it. You turn me on so much."
"I want to fuck you," Bobby said hoarsely. He looked up at her pleadingly from his kneeling position, oblivious to the shower spray cascading around them. "Please, sis. My prick is so fucking stiff, I can't take it anymore. I gotta blow my wad in your sweet cunt!"
One short glance at her brother's dick made Donna hornier than ever. The ten-inch shaft of meat rose up at an angle from his cock hairs, throbbing and twitching so violently that the knob stiffly slapped his belly. Profusely the jism drooled from his cockhead, and the veined shaft looked painfully swollen and red.
"Oh, Bobby, of course you can fuck me," Donna gushed. "But let's get out of here first. We're getting so wet."
Donna shut off the water, kicked open the stall door and started to walk out of the bathroom. But her horny brother grabbed her around the waist and pulled her beneath him onto the bathroom floor's throw rug.
Suddenly she was on her hands and knees in the dog-fucking position, ready to be impaled by Bobby's enormous cock. Donna wiggled her ass and waited for his prick to push up her cunt. She'd intended to go into the bedroom with him, but she was too horny to wait.
Bobby crouched over her body, his belly against her asscheeks, and gripped her large, hanging tits for support. Donna felt him trying to find her hair-fringed pussy slit with the tip of his cock. Then he got it into her, and she moaned as the meaty inches of his turgid dick bored into the enveloping sheath of her cunt.
"Awww God, that feels so good. Bobby!" Donna shrieked. She clawed the rug and furiously started pumping her ass onto his prick, eager now for the invasion of all of his cock. "Fuck me with it! Ram your dick in me, Bobby! Oh yes, I want it all!"
Bobby winced, as he savored the extreme tightness of his sister's pussy, the pressure of her cunt muscles milking the bloated shaft of his hard-on. His hands tightened around her pendulous tits. Donna squealed as he pinched her hard, rubbery nipples.
Finally even the base of his dick was inside her cunt, filling her pussy completely with the throbbing, drooling size of his ten-inch rod. Donna grunted and whipped up her ass to get even more of his dick inside her. Her brother's cock was so huge she thought she could feel the knob in her belly.
"Awww fuck it," Bobby moaned. Slowly he pulled his cock out again, coated now with the sticky juices of her pussy, until only the spongy crown parted her cuntlips. Then he rammed his prick back in again and started fucking her, steadily pounding his throbbing cock in and out of her cunt.
Donna was in seventh heaven. She squealed and cried in shameless ecstasy as she felt the enormous dick pumping her, seeming to fill her little pussy deeper with every stroke. Her cuntlips were stretched wide, clasping in a tight circle around his thrusting, blue-veined shaft. With every stabbing push into her pussy the underside of his dick tantalized her clit.
"Fuck me harder, Bobby!" Donna humped her ass as fast as she could, dying to keep her cunt packed with his big, satisfying dick: "Oh Jesus, my pussy's so wet! I've never been this horny before! Fuck me fast! Oh Bobby, you're making me cream!"
Bobby steadied the furious pace of his fucking, panting hoarsely as he pumped his meat through her clasping fuck tunnel. With every thrust his huge cock seemed to grow a little larger, twitching and jerking as the load of cum built in his balls.
"I'm gonna shoot, sis," he gasped. His fucking motions became quick and urgent. He gasped as his hairy balls slapped the crack of her ass. "Oh fuck, my prick's practically burning up, Donna! Your pussy's so fucking tight! I'm… oh shit… I'm… ahhhh."
He grunted and pulled her swollen tits, contracting his hips as he buried his pulsing dick all the way into the curly-haired slit of her pussy. Then he came, shooting gushers of hot jism deep inside her cunt.
It was an incredibly heavy cum, as if he'd been storing his cream for days to drop it into his sister's pussy. Again and again the salty white cum spurted and squirted from the purplish knob of his throbbing dick, completely emptying his nuts of their load.
"Oh Bobby, it feels so good." Donna squealed. She fucked him faster as she felt his jism squirting into her, soothing the walls of her pussy with the lubricating flow of cum. His jism dripped out of her slit and ran down her sweating thighs onto the floor. "Keep fucking me, Bobby! I'm so horny! I'm gonna come too."
Bobby squeezed her tits and reamed out her cunt harder than ever, moaning as the last drops of jism burned from the crown of his hard-on. Donna shuddered as the familiar tingling, aching heat built to a crescendo in the depths of her pussy. Then she was coming too, shooting off all over her young brother's thrusting cock.
When the spasms finally subsided Donna pulled away from her brothers fuck-wilted cock, unable to stand any more titillation of her ravaged pussy. Together they lay naked on the bathroom floor, panting with the exhaustion of a good, hard fuck.
Donna knew she was going to keep on giving him her pussy. She'd tried to resist, but it was impossible. How could she walk away from the most satisfying fuck of her life? Now the only problem was her husband. If he found out about their fuck sessions, Donna was afraid to think of what he might do.
"When do I get to fuck you again?" Bobby asked bluntly.
Donna giggled, then sighed. "If you're careful, any time you like."