Note: This is my version of the next chapter in the excellent "Penis Reduction Seduction" series by KaceyLoveington. This derivative ending is published with consent of the original author, but it is not meant to serve as the official next part in the series.
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When the door finally opened that evening, over a minute after he'd rung the doorbell, Nate was surprised to see that Zoe was even more disheveled than she had been when he had left that afternoon. She was wearing the same silk robe as before, but it was gaping open at the front, revealing her deep cleavage packed into the sheer bustier. Her upper chest was flushed and was covered with a sheen of sweat.
"Come on in", Zoe said, wiping an errant strand of her luscious brunette hair off her forehead. "Sorry for my appearance, I was just... working out."
Nate smiled— smirked even— and replied "You and me both." He had come right from practice and as he stepped into the house Zoe's nostrils filled with a musky aroma that made her feel lightheaded. Her pussy, which she thought had been thoroughly exhausted over the several hours since this afternoon's session, suddenly began to moisten again. She was acutely aware that she wasn't wearing any panties. As he reached back to swing the door closed, his thick forearm crisscrossed with veins looked for a minute just like his cock. Zoe bit her lip. Get it together, she thought. Her pussy twitched despite her admonition and she shivered slightly as she turned towards the staircase.
"Interesting choice of workout gear," Nate remarked as they walked up the stairs. "Looks like you've been working on your squats— those glutes are looking fine." She could feel his eyes burning into her ass, and sashayed it slightly as she climbed. The short silk robe began riding up the curve of her butt and she knew the tops of her black thigh-highs would be peeking out. At the thought she got even wetter, and felt a slight trickle of pussy juice start to wend its way down the inside of her thigh. She wondered if Nate would notice. When they got to the top of her stairs she turned back and saw the front of Nate's shorts bulging obscenely. Despite the baggy shorts the outline of his massive cock was clearly visible, having escaped the confines of his fitted underwear and extending down his leg. After several seconds she realized she was staring and pulled her eyes back up, embarrassed to find that he was looking directly at her face.
She blushed as they walked into the spare bedroom. The specimen cup and a clean set of towels were folded on the bed. Nate glanced around, disappointed that there was no picture of Zoe to aid him this time.
"I'll leave you to it," Zoe said. "Just remember to lay out the towels before you start. A load that size— I mean, an ejaculate of that volume— would ruin my carpet. And I don't want to have to explain to my husband why we need a steam cleaner." They both chuckled, and Zoe turned to leave. As she left she swung the door mostly closed, leaving it open a crack.
Less than a minute later she was back in bed, fingers running up and down her dripping slit. The video monitor showed Nate peeling off his T shirt, revealing tightly corded muscles still gleaming with sweat from practice. He lowered his shorts and underwear in one smooth motion and sure enough his rock hard cock swung up, slapping his stomach so loudly that she could hear it both over the monitor and through her own bedroom door, which she had left ajar. At the sight she moaned and began rubbing tight circles on her clit, bringing herself almost instantly to her first orgasm.
Nate picked up the towel and stopped. Underneath it he saw a black G-string, the small triangle of fabric appearing to be soaking wet.
"Sexy slut" Nate grunted, wrapping the skimpy thong around his hand and bringing to her nose. He sniffed deeply, his wide nostrils inhaling her own musky scent. His cock, which had appeared to already be at full mast, pulsed and got even thicker and longer before her eyes. He spat on his cock and began rubbing it with one hand, smelling her saturated panties with the other.
Zoe exploded, her pussy squirting all over the bed despite the fact that she hadn't even started using her dildo yet. She groaned loudly, her legs shaking uncontrollably as her pussy spasmed again and again. Stars blossomed before her vision and pins and needles danced over her arms and legs. She was too far gone to notice, but Nate looked sharply towards the door at the sound before turning his attention back to the thick slab of meat in his hand.
"Horny bitch is wet for me," Nate growled as her jerked his cock harder, inhaling her feminine scent again. "Want me to stretch that tight married cunt Dr. Z?" He lowered his other hand to his cock, wrapping the panties around his thick shaft as he stroked it even faster. "Your little husband doesn't have one of these does he?"
Zoe couldn't get the dildo inside her fast enough. Despite using it practically nonstop since Nate had left this afternoon, her pussy had already tightened back up and she had to use a lot of pressure to work the head back inside her. She pushed it deeper and deeper, thrusting her hips off the soaked sheets towards the thick invader. Nate's hands were now almost blurred as he worked his huge cock.
"Gonna fill your tight little snatch with this cock" he groaned.
"Yessss, fill me up, mold this little cunt around you" Zoe replied, juice splattering across her toned stomach as the dildo pistoned in and out of her.
"Gonna make you squirt all over me like the slut you are" Nate grunted, and Zoe did just that, covering her mouth with one hand as another huge orgasm ripped through her.
"My cum's gonna be leaking out of you for a week," Nate groaned. "I'm gonna plant a black baby in that fertile white belly of yours." And with that, he exploded with a roar, loosing jet after jet of thick white cum. He made little effort to aim for the cup this time, instead plastering the walls and the exposed carpet.
"OHHHH FUCKKKK YESSSSSSS" Zoe cried as she came hard, squirting onto her already soaked sheets. She had never cum like this, an endless orgasm that only seemed to gain strength and momentum as it rolled over her in waves. Her toes curled so hard they felt as though they would break, and her eyes were rolled back into her head so only whites were exposed. Her back arched again and again, driving the thick plastic dildo as deep into her sodden cunt as it would go. She wasn't making coherent noises anymore, but rather was grunting and moaning like an animal in heat.
Finally, after what seemed like an hour, she collapsed, panting. "Little Nate" remained buried to the hilt inside her. She lay quivering on the bed, legs splayed wantonly to the sides. She opened her eyes groggily, and glanced at the monitor. Nate was no longer in his room.
Her head jerked up, and there he was, in the flesh, standing in her doorway. His cock was in his hands and a small part of her brain was amazed that he was already hard again. At that moment her pussy spasmed one last time and the dido was slowly pushed out inch by inch, falling to the drenched sheets with a splat. She stared into his eyes, speechless.
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Nate took a step towards her, cock bobbing heavily in the air in front of him. Zoe's mouth opened and her tongue grazed her bottom lip. And at that second she heard the garage door start to open.
"Shit!" Zoe exclaimed. "Barry's home!"