She choked out a distressed cry when she felt the tool entering her tender bung and ordered Ranger down, but of course he was much too full of lusty desire to pay any attention to her words. As far as Ranger was concerned, her asshole was just as convenient and certainly much tighter, and he rammed his prong into her shitter with a long, lunging hump that sent at least two inches of dog prick slithering into her asshole. Marie tensed up and pushed back against the plunging animal, who held onto her as tightly as he could, but this only tightened her ass' grip on his cock and made him even more eager to complete the act he had begun.
Marie cried out in genuine fear and pain as she felt more of the dog's cock plunge into her ass. Ranger's prick might have tapered down to a fine point but the main shaft of the organ was about as wide as two of her fingers. For a moment it felt as though a red-hot spike had been shoved into her ass. His prick dilated her bung to a considerable extent, and it was a minute or two before she discovered that the pain had diminished and that she was receiving a highly unusual kind of pleasure from the dog. Her asshole was amply equipped with nerve endings to make it supremely sensitive to his penetration and, due to the large size of his cock, he soon began forcing grunts of ecstatic pleasure from her lips. She did not have time to worry about the implications of being buggered by an animal; the pleasure mounted higher within her body and she could think of nothing but surrendering herself to its insidious charm.
Her asshole was far too tight for the dog to work the big knot in his prick inside, of course, but that didn't keep him from trying. He fucked as much of his cock into her butt as he could and struggled mightily to force the big lump into her tautly strained brownie as well. He was not able to force the entrance, however, and reached his climax as he pounded against her stretched bung. She could feel the big knot hammering against the rim of her asshole; the added pressure made her flesh tingle even more excitingly and added wonderfully to her pleasure.
To her vast surprise, she quickly felt her cunt knotting up into that familiar quivering ball of sexual tension and then burst apart with shattering force. The sensations which she felt as the dog's prick pumped back and forth in her asshole were not like those when the rod was buried in her cunt, though there was the same feeling of fullness, but she seemed to be even more excruciatingly aware of his cock. She could feel the continual squirts of cum even more acutely, and her body reverberated with every bit as much frantic joy when the orgasm mounted higher and began spreading outward from her pussy. Surrendering to the inevitable, she gave herself over to her climax and shivered heavily as the spasms continued to roll through her flesh. She came again and again until it seemed that her cunt was melting and running out the lips of her pussy; the waves of pleasure tapered off but did not disappear when Ranger finally slid off her and slumped down behind her.
Marie's fingers closed on the lips of her pussy, and she began masturbating slowly as she crumpled over onto her side. She caressed the swollen lips tenderly and worked her fingers up and down her moist, hot gash. Remembering the savage, thrilling joy she had felt when the dog's cock had been slamming into her asshole, she brought a hand up between the cheeks of her ass from the rear. A thin trickle of the dog's cum seeped from the bruised, tender bung as she ran her middle finger over it tentatively; she hesitated for only a moment, then began working her finger into the tiny hole, groaning with pleasure as she did so.
"Omigod, it's so fucking good!" she moaned in a quavering tone. "Mmmm, I'm fucking myself all over again!"
She drove two fingers of her left hand into the mouth of her cunt, hooked them into the rim of the passion-slick hole and heaved up against her palm so as to rub her clitoris into the waiting flesh. The contact sent electric thrills of sensuality racing through her loins and she began fucking herself harder. Cries of delirious pleasure seeped from her lips as she writhed upon the floor, jabbing one finger into her asshole and working her cunt against the other hand. She fucked herself with a hard, driving insistence that could have only one result. Giving one last wailing cry of sexual anguish, she plunged back and forth briefly, then stiffened into immobility as the climax burst deep inside her cunt.
"Anngghh!" she moaned, shuddering visibly as the waves of climactic joy rippled through her and infected her entire body with a feverish delight. "Unngghh! Ooohh! Come! Fuck! Come! Cream!"
And so Marie discovered yet another exciting aspect of sex. Thereafter, when she masturbated, she always ended up with a finger rammed into her asshole, and she succeeded in getting Ranger's cock planted there on more than one occasion, though it was a matter of luck whether the tool entered her ass or her cunt. It made little difference to her in the long run: in either place the dog could give her a great deal of pleasure.
She found it a different matter when she considered telling her son about her momentous discovery. She quailed at the thought of mentioning it to Mike, who, she thought, might be turned off by the idea. She could not forbid the exciting pleasure to herself, though, and she continued finger-fucking her asshole whenever she masturbated.
Mike had been working at the resort's lakefront for about five weeks when he brought Carol home to introduce her to his mother. He had discussed the possibility of doing so on his previous visit, and she had encouraged him to carry through with the scheme, being very anxious to see this paragon of juvenile sexuality who was exerting so marked an influence upon her son. She had found him becoming much more open about his desires, much more wining to suggest variations on the more familiar styles of lovemaking; in short, he was becoming much more adult about fucking. He had been uncertain when he could bring her, since their schedules were different, but had agreed to do so as soon as possible. Marie steeled herself to be nice to the girl, who was of course a rival for the boy's affections, and told herself that her affair with her son could not last forever.
She had been delayed at a meeting across town that Saturday, and a sudden thunderstorm made her even later in getting back home after the luncheon she had attended. She drove back impatiently, and puked up into her garage a good hour after she had hoped to be back home. A small red convertible sat parked in front of the house; she supposed that it was one of Mike's acquaintances from the lake who had brought him home for his two days off. She went into the house through the kitchen, which opened directly into the garage, and kicked off her wet shoes as soon as she was inside. She padded through the kitchen in her stocking feet but pulled up short when she turned into the archway opening into the living room.
Mike lay sprawled upon the sofa with a voluptuously curved female whom Marie at once guessed was Carol. The girl was utterly naked, and was rubbing her pussy over Mike's belly. His cutoff jeans were open, and his cock, big and hard as ever, reared up angrily, barely touching the lips of her cunt. Marie realized that they had been so engrossed in their own passionate lovemaking that they had not heard her drive up and that they were still unaware of her presence. She sank back against the wall, and once she had gotten a good look at the way they were writhing and twisting against each other, found herself frozen to the spot. The sight of the girl's slender, almost boyish hips grinding excitedly just above her son's swollen cock made her pussy throb at a fearful rate.