Sarah shuddered when she heard the knock on the door.

“I’ll get that,” Mike told her as he got up from his chair.

Sarah, who was standing in front of him, moved aside as he rose. Shrugging past her, Mike went to the door and let the person in.

Sarah stood, frozen, facing Mike’s chair. Her already soaked inner folds moistened even more when she heard boots, then the ticking of claws, on the hard wood entry foyer. She swallowed hard as she heard the sounds approach the living room, the clicking sounds vanishing as they reached the carpet.

“Turn around,” Mike’s voice gently commanded.

Closing her eyes, Sarah did as she was told. She shuddered again as she heard the newcomer’s reaction to her attire.

Standing 5' 9" tall, Sarah was a statuesque beauty. Her flowing brunette hair framed her downcast face perfectly as it cascaded over her shoulders. Her heavy breasts heaved as her breathing deepened. Goose-pimples formed over her flat tummy and shapely hips as the thrill of the situation raced through her sexually charged body. Sarah was totally nude, her only adornment was a chrome pair of handcuffs, securing her wrists behind her back.

Lifting her head, she opened her eyes and looked at the newcomer. His eyes traveled the length of her body. She looked off to his left side to see a huge German Shepherd, obediently sitting by his master’s side.

“This is Buck,” Mike told her. “You already know Bill.” Sarah nodded. “This is your last chance to back out,” he continued in a soft voice. “Once we begin, you have only to use the safety word to get us to stop.”

Sarah again nodded, then spoke for the first time. “I understand, and I’m ready.”

No further words were spoken as the men approached her. She inhaled deeply as both men sandwiched her body between them.

Sarah closed her eyes once again as hands explored her already quivering body. She inhaled the combined scents of the men as a finger split her engorged labia. A mouth attached itself to the side of her neck as her legs parted of their own will, allowing the finger greater access to her already soaked sex. A hand gently kneaded her breast, the fingertips rolling the taut nipple between them as the finger teased her clitoris.

Sarah felt the growing bulge in the crotch pressed against her cuffed wrists. Breathing deeper, she felt the bulge pulsing beneath the cloth which separated them. As if sensing her frustration with not being able to grasp the growing bulge, it began to move up and down along her inner forearm. The exploring finger suddenly disappeared and she felt hands on her shoulders, gently pushing her downward. Taking the que, she silently slid to her knees before the man in front of her.

Leaning forward, her cheek came into contact with the denim-covered bulge forming in the man’s pants. A hand gently guided her face away as the man reached for his zipper. Sarah opened her eyes when she heard the sound of the zipper being pulled down. She watched in wrapped anticipation as his fingertips reached inside the garment. As his penis came into view for the first time, Sarah moaned. Leaning forward, she eagerly took the stiffening member between her lips and slid her tongue over the purple crown, tasting the droplet of pre-cum which had formed there.

The man slowly slid more of his cock into her mouth, a slight groan escaping him as her nose grazed his pubic hair. Teasing the underside of his cock with her tongue, she pulled backward, sliding the now rigid organ half way out of her mouth. She swallowed, then slid her lips back down along the shaft, reveling in the slightly salty taste, musky aroma, and velvety texture as she swirled her tongue along his length.

She shuddered involuntarily as she suddenly felt hot breath along the cleft between her tight ass cheeks. She quietly moaned around the cock as a wide tongue slid between her cheeks, tickling her most private places as it explored her. Hands quickly uncuffed her wrists, allowing her to lean forward onto all fours, momentarily pulling the rock hard cock out of her mouth, and exposing herself completely to the dog behind her.

Bill stepped back to let her settle into her new position, then knelt down in front of her, his thick cock standing proudly out of the fly of his jeans. Sarah quickly moved forward and took him deeply into her mouth.

Mike stood back and removed his shirt as Buck once again nosed at his wife's widespread crotch. The Shepherd licked at her engorged labia once before slipping his tongue deep inside the woman. Sarah moved her hips backward, pressing into the dog’s muzzle as the tongue scrubbed at her inner walls. Her breathing came in shallow gasps as the sensations rippled through her body. Bill rocked his hips forward, slipping his cock deeper into the woman’s mouth. He watched her heavy breasts sway as she rocked back and forth. Reaching out, he cupped one, then the other as he began to thrust into her warm mouth.

Mike dropped his pants to the floor and stepped forward. Moving Buck aside, he took his position behind his panting wife. Buck reached underneath the couple and licked at her pussy as Mike teased her opening with the tip of his erection. Suddenly, taking her hips in his hands, he plunged the full length of his rigid shaft into her soaked pussy in one swift stroke.

Sarah slammed her eyes shut and groaned heavily around the organ in her mouth as her husband began to fuck her furiously. The added stimulation of the dog’s tongue caused her mind to reel. She barely noticed as Bill slipped his cock completely down her throat.

Both men fucked into the woman savagely as her first orgasm burst forth. Mike felt her inner muscles spasm around his cock as she came, the added stimulation bringing his own climax that much closer. Slowing his pace slightly, he relaxed and settled himself into a steady rhythm.

Bill continued to pump into her wildly, beyond holding back his orgasm. Sarah moaned and sucked at the cock as she rode her orgasm through its course. She felt the cock buried in her throat begin to swell even more and pulled her head back, leaving just the swollen tip between her lips. Bill climaxed with a groan, sending his pent up load hurtling into the brunette’s mouth.

Her orgasm subsiding, Sarah struggled to keep up with the amazing volume of Bill’s climax. She gulped greedily at the flow as the organ jumped and pulsed in her mouth, flooding her senses as well as her body. Her husband’s thrusts moved her forward, sending the tip of the still spasming cock toward the back of her throat. Sarah inhaled deeply and slid the full length of Bill’s twitching member into her mouth, the final pulses of semen dribbling directly into her belly.

Mike slowed to a stop as his wife’s orgasm completed its magic. Withdrawing slightly to ease the forward pressure, he allowed her to pull Bill’s throbbing penis into a more comfortable position. Sarah breathed heavily through flared nostrils as her tongue bathed the shrinking cock, relishing the flavor of him.

Mike withdrew slowly, leaving her pussy vacant and gaping, and stood up. Leaning forward, he helped his wife to her feet. She gingerly followed Mike to the couch and laid back with her ass on the edge of the cushions. Buck took advantage of the woman's widespread thighs and slid between them. Sarah moaned, her eyes closed, as the wide tongue once again slid into her still dripping pussy. Her hips wriggled back and forth, causing her ass to slide closer to the edge of the cushion. She held her breath as the tongue disappeared and the dog’s weight suddenly landed on her flat tummy.

Bill moved forward and gently grasped the sheath of his rapidly humping dog. Holding it in the right position, he guided the pink tip between her gaping lips. Buck lunged forward, his hot cock blasting into the woman’s warm depths. His muscular haunches appeared as a blur as he frantically plunged his entire length in and out of her. Sarah wailed with delight as the cock pummeled her sex, filling her with sensations she’d never felt before.

Mike climbed up onto the sofa and knelt over his wife’s face. He silenced her by sliding his thick cock into her mouth. Sarah responded by sucking the organ deeply into her mouth. Her body shook under the pounding fuck of the German Shepherd, her second orgasm approaching rapidly. She concentrated on the twin organs filling her body as the sensations in her tummy increased. Her eyes suddenly flew open as she felt Buck’s rapidly thrusting cock begin to swell.

Bill watched in fascination as Sarah’s body responded to Buck’s frantic fucking. He knew what was coming, but didn’t know if Sarah did. When her eyes flew open, he knew she was finding out firsthand about a dog’s knot. Sarah wailed, dropping Mike’s cock, as Buck’s knot began to swell deep inside her pussy. Their position did not allow him to achieve a complete tie and the knot slid in and out of her tortured opening. Sarah came unglued.

Blinding white lights flashed through Sarah’s mind as the strongest orgasm ever crashed through her. Her body thrashed around helplessly as her vagina convulsed around the dog’s amazing cock. The fully swollen knot plunged repeatedly in and out of her spasming pussy, pummeling her clitoris as it battered its way inside her. She held her breath and squeezed her inner muscles as the glorious orgasmic flood washed through her. Suddenly, Buck came as well.

Sarah’s orgasm started anew as a steady stream of incredibly warm semen flooded her pussy. She clutched at the sofa cushions as the convulsions ripped through her. Buck’s frantic thrusts slowed quickly as he emptied himself into the wailing female beneath him. With a final forward thrust, he buried his cock inside her and stopped completely.

The force of Sarah’s orgasm slowly reduced. Breathing heavily, she opened her eyes to see the German Shepherd collapsed on top of her, his still throbbing cock buried deep inside her. Looking up, she saw Mike and Bill smiling down at her as Buck continued to pump his watery load into her relaxing vagina. She smiled, weakly, back at her husband before closing her eyes to enjoy the warmth spreading deep inside her.

At length, Buck regained his senses enough to lift himself off the woman. Backing up, he withdrew his swollen cock from the woman and jumped back down onto the floor. Fluid poured out of the woman as the seal formed by the huge knot was broken. Mike looked down at his cum-soaked wife and smiled once again.

Moving quickly, he sat next to her on the sofa. Signaling to Bill, they both lifted the woman to her feet and guided her over her flooded pussy over her husband’s lap. Sarah straddled her husband and slowly guided her pussy toward his rigid cock. She moaned softly as her weight slid the rock-hard organ completely into her. She settled herself in his lap, allowing the full sensation to flow through her already tortured body. Slowly she began to undulate her hips, setting up just enough friction to keep her husband’s cock nice and stiff.

As her breathing began to return to normal, and her energy returned somewhat, Sarah moved her hips in larger circles, grinding her crotch into Mike. Bill stood in front of her, his semi-erect cock hanging out of his jeans as he watched the couple fuck in front of him. Reaching down, he held her breasts as they swayed in front of her. Sarah flicked her tongue out of her mouth searching for contact with Bill’s cock. Trapping his hips in her hands, she finally captured the organ and slid it between her warm lips.

Bill held the back of her head as he slowly pumped his stiffening cock into Sarah’s now familiar mouth. Her tongue swirled along the bottom of his thickening shaft as she drug her teeth ever so lightly along its length. She felt the shaft surge into sudden rigidity as her tongue slid over the rubbery crown. Mike began to slowly rock her back and forth, keeping his cock moving within her. Sarah felt the rush of pleasure surge through her as her husband’s cock glanced off of her cervix. Just as she felt her excitement begin to rise, the men suddenly stopped.

Grinning widely, Mike and Bill Lifted the bewildered woman off of her husband’s still rigid tool. Holding her just over his straining erection, Mike aimed the tip of his penis at it’s new, target. Realization of what was about to happen suddenly hit Sarah as she felt the tip of Mike’s erection nudge its self between her tight ass cheeks and come to rest against her tight rear passage.

Inhaling deeply, Sarah closed her eyes and bent her knees, allowing the well-lubricated head of Mike’s cock slip into her. Biting her lower lip in concentration, she let her weight carry her downward, slipping the rigid shaft deeper into her than she had ever dreamed possible. As the cheeks of her ass came to rest on his lap, she released her breath. The couple held still, letting her body become accustom to the new form of intrusion. Bill had other ideas.

Still fully clothed, Bill stroked his hard-on and got down on his knees. Positioning himself between Sarah’s widespread thighs, Bill slid the entire length of his now stiff cock into her cum-filled pussy. Sarah’s eyes flew open as she immediately orgasmed, the sensations overtaking her body completely.

Bill drove his cock into her steadily as her muscles convulsed around his shaft. His rhythmic thrusts drove her onto her husband’s cock repeatedly. Leaning forward for better leverage, he started to pound himself into the writhing woman. Reaching around her, Mike held her breasts as he ground his stiff cock deeper into her ass. The added friction of Bill’s cock thrusting back and forth in her spasming pussy, separated only the thin tissues between her orifices, sent his pulse racing. Sarah bucked and moaned between the men as wave after wave of orgasmic pleasure washed through her. She wailed as she suddenly felt Bill’s cock explode deep inside her tightly stretched vagina.

Bill fucked in and out of the woman frantically as his climax burst forth. He groaned loudly as he felt the semen travel up the length of his erection and erupt within the still spasming walls of Sarah’s hungry pussy. She bore down hard on his cock with her inner muscles, determined to milk every drop of cum from him. She suddenly exploded in orgasm as she felt her husband’s cock stiffen and explode in her rear passage.

Mike released Sarah’s heaving breasts and pulled his climaxing wife’s hips tightly against him. Thrusting forward, his cock erupted deep within her body. Limited by the combined weight of the couple climaxing on top of him, he relied solely upon Bill’s spasmodic thrusts to supply the friction required to complete his climax. He growled deep in his throat as his load rushed from his body, filling his wife at the same time his friend did the same.

Sarah screamed with pleasure as the two rigid cocks emptied themselves inside her, flooding her body. Her abdominal muscles convulsed as the two penises jumped and jerked inside her. The very tip of Bill’s erupting cock pummeled her cervix, sending vibrations through her. As if controlled by a switch, the trio came to a halt, none of them able to move any further.

Sarah collapsed between the two men, their cocks still buried deep in their respective orifices. Her eyes closed, she began to relax as the final waves of her orgasm flowed through her. Feeling warm, full and content, she thought to herself that it would be easy to fall asleep in this position. Again. Bill had other ideas.

Gathering his strength, he lifted himself and withdrew. Sarah let out a disappointed gasp as his cock slipped out of her, leaving her cum-flooded pussy vacant. Poking out her bottom lip in a pouting expression, she looked at Bill as he stood up, smiling.

“Don’t worry, you aren’t done yet,” he replied to her silent accusation.

Her expression changed as she realized what he meant by the remark. Looking over into the corner of the room, she spotted Buck, snoozing contentedly. A sudden thrill went through her as Bill called the dog over to the couple, still joined on the couch.

Buck needed no urging. He instantly buried his muzzle between the brunette’s wide open thighs. Sarah groaned as the rough tongue slid into her cum-soaked vagina. Buck scrubbed and scoured the brunette’s inner walls, attempting to get at more of the combined liquids. As the tongue wriggled and writhed inside her, Sarah felt the familiar sensations creep through her pussy. Subconsciously, she undulated her hips, causing her ass to massage Mike’s cock. Buck kept up his oral assault on her as her hips began to rock back and forth, attempting to guide the tongue toward her most sensitive places.

Mike felt his cock begin to respond to Sarah’s inner muscles as they milked him. Whether by chance or by design, his cock began to once again engorge, slowly stiffening as his wife moved above him. He heard his wife gasp as he gave an exploratory thrust. She shuddered above him as the sudden movement sent a jolt of pleasure up her spine. Moving slowly, lest he slip out, he rocked his hips upward, feeling his erection return with each passing moment.

Sarah felt her husband’s cock return to life deep within her. Closing her eyes, she reveled in the steady growth of the organ still buried inside her. Reaching down between her legs, she slowly stroked her clitoris, occasionally nudging Buck’s nose as he hungrily lapped at her pussy. She let her hips rock of their own will as she realized Mike now had a complete erection.

Once Mike was sure his now erect cock would stay completely inside his wife, he began stroking in and out of her with slow deliberate strokes. Finally unable to breathe after having a constant weight atop of him, he grabbed his wife’s thighs and held her still.

Maneuvering her over onto her tummy, with her knees on the floor, he, at last, breathed deeply. Buck scrambled beneath him to get back at the dripping pussy he had been enjoying. Taking her hips in his hands, forcing her tight ass cheeks together, Mike began to thrust in and out of his wife. Sarah gasped as her husband’s cock filled her repeatedly. Suddenly feeling the tongue slip back inside her, she relaxed as the two “males” settled in for a long, luxurious fuck.

Mike held Sarah’s hips and stroked firmly and deliberately in and out of his wife’s ass, feeling the tight muscles as they grasped at the length of his stiff cock. Having just cum, he knew he would last a long time before cumming again. Winking at Bill, he reveled in both the feelings his wife’s body provided and his newfound freedom of movement.

Sarah groaned heavily as the thick cock repeatedly filled her ass. Although she rarely let Mike take her in this way, it seemed to fit right in with the action her body had been craving. Being Mike’s sex slave was a favorite activity of the couple’s. Letting Bill, and Buck, join in had been her idea. She shivered as the complete length of her husband’s cock slid in and out of her, sending vibrations throughout her body. She moaned out loud as the dog’s tongue slid back and forth over her once again throbbing pussy. She felt her next climax building rapidly.

Bill simply smiled as he sat back and watched the couple enjoy themselves, knowing full well that his turn would come soon. As Sarah erupted in another loud, convulsive orgasm, he wondered to himself who would wear out first. He knew would be ready to go again soon, and only hoped she’d still be awake enough to take him. He and Buck were going to be spending the night, and it promised to be a long one.