Eric moved up Eileen's arm and around her neck. He was now substantially bigger, and his little red cocks brushed over her smooth flesh as he slithered forward. The feeling was wonderful, even if it was all so weird.
"Having fun?" Eileen asked, grinning as Eric grew further and further, and sweetly the snake twisted his neck around and placed his scaly lips to his wife's.
The human woman and the serpent kissed as the snake pressed larger and larger. The reptile used his forked tongue to taste the much bigger human's lips, and Eileen passionately suckled on the snake's growing muzzle. Before too long, Eric had coiled part of his body around Eileen's chest, and his coils were now gripping and skillfully playing with her tits despite a total lack of hands.
"Ohhh... yes, sweetheart. That's it. Wait..." Eileen grinned, and willed her chest to surge. Her already ample triple D's inflated fully to a larger size, and she felt a jolt from the snake's growing manhoods, nestled below her neck.
"See, there's all kinds of fun things I can do now!" She gasped, as the serpent vigorously renewed his playful squeezing and massaging of her big tits. The reptile was now getting thick and heavy as he grew larger in size, and Eileen moaned as Eric began kissing her anew with sweet snake kisses, while the very tip of his tail slipped between her legs and began teasing her pussy lips.
While kissing so nicely, something began to push on Eileen's chin, and she looked down in delight to see one of the twin snake cocks growing along with the rest of him and brushing her face. She couldn't resist. Breaking the kiss with Eric, she heard the serpent hiss sharply in delight as she licked his cock, which jolted and swelled from the attention. While just reaching the size of her pinky, it was attached to a six foot serpent, and as his growth continued it became more sizeable as she sucked it into her mouth and began to give her husband snake a rather delectable blow job.
Eric bucked and squeezed his wife tightly in his glassy coils, his tail tip rubbing her pussy faster in excitement, his thickening coils squeezing and massaging her torso in bliss, his one manhood taking the delightful punishment as it grew in her mouth, the other aching for touch. The snake brought his head around until he was face to face with his own bright red cock, and with a gulp, he tried licking it. It felt good, so he continued. Eileen saw this, grinned warmly, and doubled her sucking, watching as Eric's growing body writhed and he joined in to suck on his other untended cock.
With his head resting against his wife's, the moment was weirdly surreal as both of them took care of two very needy snake dicks. At last, as Eric reached nearly eight feet long, Eileen felt the tip of his serpent cock touch the back of her throat and smiled as she realized how big he was now. She looked over to see the snake's muzzle bobbing on his own manhood, his face contorted into intense need as he suckled and slurped at himself. Eileen opened her mouth gently and slurped up his shaft, finding it was now just a little over the length of her own index finger, and quite a bit thicker.
"Mmm, good enough." She said sweetly, tapping the snake's busy head and making him pause. His tail had never stopped grinding her pussy, and she was quite wet and turned on. She patted Eric on the head lovingly, and positioned herself before him, pushing the snake's coils off of her and lying spread for him on the sheets. The reptile's eyes widened, slithering in his thick and muscular coils, and he knew what she wanted. What he wanted. Pulling himself around, creeping over her and then her thigh, the serpent's burning hot crotch positioned itself over her sex and he looked longingly at Eileen for approval.
"Oh, yes, honey. You're getting to the right size now." She smiled, stroked the serpent's raised neck, and made him hiss. He was still growing, his head nearly the size of her entire hand now, and Eileen melted as she felt a warm cocktip slip between her slick lips and spear her pussy. It was so much smaller than she was used to, but, she mused, it would be big enough to fill her. Indeed, she could feel the growing member stretching her pussy open slowly, which was all together a wonderful feeling.
The snake's other free cock was pressed against her thigh, hot and swelling, and she nodded her consent. Eric began slowly, thrusting his coil gently at first, then noticing her the loose snatch over his dick was getting tighter by the second. Realization kicked in, and the snake began full blown fucking his wife as he grew, hissing and flexing on top of her, a big long mass of snake. Eileen wrapped her legs around the serpent's tubular body, caressed her arms over his back scales and neck, and they kissed passionately with Eric's flexible body convulsing and writhing against her as he grew bigger, heavier, more substantial.
"Ah!" She winced, grinning ear to ear. "Oh damn! You're getting large now!" Eric noticed too, desperately thrusting his meat inside of his woman, and noticed that with each thrust Eileen was starting to feel tighter and tighter. Of course she was staying the same, he was just growing into a huge snake. With how wet and slick she was, the snake had no problem fucking even as he became bigger than he had ever been as a man. He watched Eileen groan, grab the sheets tight in balled fists, and begin to writhe beneath him. He felt orgasm coming, closed his eyes, and still he grew bigger and bigger, stretching the woman like she had never been stretched before. He found he couldn't even get all his cock inside of her anymore, and glanced down to see his second red member had filled out obscenely huge. He looked back to Eileen, closed his eyes as a wall of orgasm slammed into him, and bucked hard, making her scream as he unloaded snake seed into her pulsating snatch.
Still, Eric wasn't satisfied as he drew out his expended cock, marvelling as a full eight inches slurped out of her with jizz dripping in front of it. Without hesitating, still growing bigger, the now massive reptile deftly switched cocks and slipped his other manhood into the woman, making her grind into him and screech with female delight as he stretched her beyond anything she had ever felt before. Staring down at her huge tits and perfect middle aged body, the snake remembered why he had loved her. It was getting harder and harder to stay planted inside of her, his dick now so long and thick only half of it was able to penetrate her without discomfort, and more than once he rammed it in too hard and clumsily struck her cervix. Eileen screamed, her hands flying down and gripping the base of his cock in both hands, and she frantically jerked on it as he fucked her.
"B-Big!" She gasped, eyes opening long enough to see a giant and rapidly expanding serpent lying on top of her in sexual bliss. "HOLY SHIT!" She felt herself starting to cum, frantically hammered her pussy onto the massive snake cock, and together they both released at the same time, Eric so massive now that his ejaculation spilled forth from her pussy and soaked the bed sheets. Spent, the snake fell on top of her, eliciting a gasp, and Eric rolled to his belly in disbelief, seeing both his dicks had grown hard after just moments and were back up to throbbing, still dripping fresh seed.
"Holy fuck!" Eileen, washed with sexual pleasure, frantically turned herself around on the bed, drenched in snake cum and sweat, and began licking and sucking on his huge and increasingly huge snake cock with her mouth with her free hand jerked his second. He was now a solid foot of thick snake dick with each, and the bigger he got, the more turned on Eileen got. Before long, the snake was hissing and writhing in pleasure as his wife made him cum again, and again, using her power to fill him back up with jizz and grow him hard again so they could keep playing. At one point, Eileen closed both hands over his dual manhoods and squeezed them together, letting Eric hump her fingers as she gripped tightly. At that point, he blew so hard he splattered the woman on snake jizz and proceeded to twist his massive head around and begin eating her out, and when Eileen came again from a powerful snake tongue proving her depths, still they kept going, for hours.
By the time they were done, Eric was breathing heavily in the bedroom, his body so massive he was coiled over practically everything and twitching as he squirted out the last of his jizz, in a stupor of pleasure unlike anything he had ever felt before. His head was the size of Eileen's torso, his body as long as a bus, and as thick as a fire hydrant. This was to say nothing of his slowly softening cocks, which were nearly two feet in length and as thick as a pop can.
Drenched in snake cum, her own juices, and blushing bright red with sweat, the woman finally willed the serpent to stop growing, which he did. "A-All right." She gasped. "I think that was good."
Almost immediately, they both fainted, Eileen passing out in the coils of her husband and Eric falling limp around the room.