“Okay, shall we get started?” Caitlin asked.
Percy nodded as he took a seat on the bed, wearing only his boxer shorts.
Doctor Caitlin Snow began her examination with the usual, checking his heartbeat and blood pressure. She was wearing her white coat, hooking her Stethoscope around her neck when she was done. Percy Jackson had been brought to Star Labs a few hours ago following a fight with one of the Flash’s villains who could turn into poisonous gas, so she insisted on giving everyone a complete physical examination. Percy was her last patient, and they were the only two left in the lab. The others were out solving the crime and chasing the villain, giving Caitlin all the time she needed alone with the demigod. While she had him, she took the opportunity to take some blood samples and run other tests. It wasn’t often a scientist like her got to examine a member of Greek mythology like the son of Poseidon himself.
Percy was patient as he sat through her tests, obeying her every instruction even though he felt fine. He wasn’t used to seeing mortal doctors after battle, but his new friends in central city insisted and he’d come to trust this particular doctor. So when she brought him into the lab and asked him to take his clothes off, he didn’t argue stripping down to his underwear. She was completely professional as she examined him, running tests and taking samples, making sure everything was working as it should.
But then her alter ego got into her ear, reminding her how unprofessional it would be not to make sure everything was functioning. At first she ignored Frost’s voice in her head, but then she kept pausing to stare at Percy’s toned muscles and physique, admiring his godly gifts. She scolded herself about how inappropriate it would be, but then Frost told her “it wouldn’t be the first time you tested a patient’s assets.”
“Everything okay?” Percy asked, looking at her worryingly as she hesitated with her stethoscope over his chest.
She looked up at him, realizing she was acting weird and cleared her throat. “Could you lay back on the bed for me?” She asked politely. He complied without question, shuffling onto the bed laying flat on his back. Caitlin stood over him, admiring his body resisting inappropriate impulses. “So, do you feel like everything is working properly?” She asked.
“I think so” he shrugged.
She nodded nervously, Frost’s voice throwing out compliments ogling the same things she was. “Well, I should check myself, just to be safe” she said, reaching down to massage his arms and torso, checking circulation she told herself. She started at his chest, rubbing her fingers along his neck and shoulder, then his arms and legs, bending the knees and elbows just to keep up the façade. Her last port of call was his groin, where the young demigod was starting to sport a meaty bulge thanks to her massage. “I’m just going to remove your underwear for a second, is that okay?” She asked him, her heart racing. He nodded silently. Frost practically squeal when she peeled the boxers down and revealed Percy’s generous manhood.
He was certainly above average, exactly what she would expect from the son of a Greek god. She had to suppress Frost from coming out and swallowing his manhood. She had to perform her tests first. Reaching out, she began to stroke his penis with her fingertips, watching the blood rush to his groin before her eyes. She started making mental notes as she massaged his shaft, rubbing his dick slowly with her hand. She heard Percy exhale next to her, glancing over to see him relaxing in her grasp.
“Everything seems to be working so far” she muttered, gulping down her trepidation continuing to jerk the boy off on the table. “Excellent blood flow, making the subject very…very erect.” She could hear Frost teasing her as her cheeks flush red, mentally pushing her to hurry thing up and get to the important part. “I’ll need to test other stimulus, so I should… I should…”
“Do what you need to doctor” Percy moaned, his eyes rolling into his head as she squeezed his cock. He figured out what tests she’d intended and initially was worried. But once she started, he was in no hurry for her to stop. In fact he invited it, lifting his hips slightly so she could rub his further.
Taking the invitation, Caitlin nervously nodded and leaned over the table to hover over his penis, inhaling his musk through her nose. Before she could change her mind, the good doctor opened her mouth and took the boy inside it, wrapping her lips around him closing her eyes. She got a couple of inches in her mouth before gagging, holding herself still until she adjusted enough to begin sucking his cock. Percy moaned, his hands clenching into fists hovering over her head resisting the urge to push her further down his cock.
Caitlin took her time once she got into her groove, bobbing her head up and down massaging the other half of his dick with her hand. After a few minutes, astonished he had held off ejaculating, she released him with a pop. “Impressive” she whispered, licking her lips. “Well, that’s two stimulants down. Just one to go.”
Standing up straight, Caitlin started to undo her pants and remove them. Percy watched her climb out of them, his gaze fixed on her as she climbed onto the table straddling his hips, his throbbing erection rubbing her pussy. She looked down at the young demigod, shivering nervously as she aligned herself with his penis. With a nod to each other, she lowered her hips down upon him, moaning as she was penetrated. He felt much bigger that she was expecting. “Fuck” Percy groaned as her warm pussy enveloped him, taking hold of her hips to assist her in bouncing on his cock. “So good” he muttered.
“Yes, so good” Caitlin concurred, bracing her hands against his chest to steady herself. She hopped up and down on his lap, her white coat falling over their legs as she arched her back. “The asset is completely…perfectly functional. Rearming solid under…vigorous testing…”
“You’re enjoying this doctor?” Percy asked.
She looked down, her face flushing red. “I’m just being thorough” she objected, but the waver in her voice gave away her excitement.
Percy called her bluff, reaching up to grope her breasts and pull her down for a kiss. She didn’t resist, locking lips with the demigod running her hands through his hair, moaning when he unbuttoned her shirt to squeeze her breasts, lifting her bra to pinch her hardened nipples. Her thighs tightened around his hips, her inner walls crushing him tightly as she orgasmed. She pushed herself upright as Percy continued to thrust up into her, fucking her throughout her orgasm eager to drive her towards her second. “Okay, yes, I can confirm…everything is in per…perfect condition. Though, just to be safe…maybe I should…take a sample…for analysis” she suggested, panting and moaning gripping his knees as she lent back.
“A sample of what?” He asked in confusion. But then her hand reached down to gently cup his aching ball-sack and it clicked. “Oh, okay. I don’t think that’ll be a problem” he grunted, already on his way to cumming thanks to Caitlin's tight pussy massaging him. They fucked and shuddered until they both cried out in pleasure, their climaxes melding together as Percy ejaculated into Caitlin’s cunt gifting her with a sample of his semen as requested. Her pussy swallowed it all up storing it inside, waiting for her to either retrieve it or make further use of it in her womb. She would have to consider her options quickly on that thought, but for now she rode the orgasm to its natural conclusion before disembarking the demigod.
Dropping back onto the floor, doctor Snow composed herself as she stumbled unsteadily to the nearby desk to note down the results. Percy sat up feeling very rejuvenated, his penis still partially stiff which Caitlin also noted. “It would seem your still able to function, Mr Jackson” she replied, using a few of her tools to catch his leaking cum from her pussy in a test tube. “Any discomfort or aching?”
“I don’t believe so” Percy answered. “What about you?”
She giggled, still breathless from the exercise. “None at all” she replied, placing the sample and her stuff down before bringing over one of the heart monitors. “I have one last procedure to run with you before we finish” she explained, sticking the small patches with wires to his chest to monitor his heart rate and vitals, ever attaching a pair to his head to monitor his brain activity. “We need to test your endurance, make sure your at peak efficiency.”
“Very well, by all means” Percy grinned, not seeing a treadmill anywhere nearby as she walked over to a chair and took off her coat so she could undress. He waited by the table, his penis already growing back to full size. “So what kind of exercises do you want us to perform doctor Snow?” He asked, keeping in character.
“I’m afraid Caity won’t be performing this procedure Mr Jackson” Killer Frost replied as she put her lab coat back on over her naked body, her brunette hair turning pale white along with her skin as her lips turned blue. She turned around to flash her white irises at the muscular young teenager, a devilish smirk on her lips as she admired him herself. “I’ll be running your tests” she told him, her confident voice casting faint wisps of cold as she strode towards him running a chilly finger along his jaw. She held his gaze as she dragged her nail down his chest, an icy chill running down his spine towards his groin where she reached underneath him and touched his swollen balls. He gasped as they suddenly turned to ice as Frost slithered along his cock, turning the stiff rod rock hard. “Don’t worry, I’ve just chilled the tanks so you don’t bust a nut too early” she said. “By the time we’re done, those baby makers should be nice and thawed. So” she asked, standing prominently in front of him with her hand on his hip watching him stare at her beautiful figure, “shall we begin?”
Frost was shoved against the wall by the powerful demigod, his strong hands pinning her as she slammed his erection into her cold cunt. She hissed as her vagina stretched around him, a wide grin on her face, grabbing his black hair pulling him into a rough kiss. Unlike her alter ego, Killer Frost was much more aggressive and confident than Caitlin. Fortunately, Percy was up for the challenge as he fucked her as hard and fast as he could even with his balls on ice. “Fuck, you’re cold” he grunted, feeling his balls clap together like ice cubes. Even his cock ached from how frozen it was.
“I’m testing your endurance, remember?” Frost said, thrusting her hips grinding against his stiff penis. “Exercising in the cold makes the results more accurate” she explained.
“Are you sure?” Percy asked after she tongued his mouth in a deep kiss.
She released him, frosty mist spilling from their lips. “What’s wrong? Surly someone as hot as you can warm us both up. Now shut up and fuck me. Doctor’s orders.”
Despite the cold and the mild discomfort in his groin, Percy smirked as he wrapped his arm around her waist, thrusting harder into her pussy kissing her back. She retaliated by grabbing his ass, pulling him in deeper lifting one of her legs. They fucked mercilessly against the wall of the lab, the monitors beeping steadily still monitoring Percy’s condition. Not that Frost was really paying attention to it as the young man nuzzled her jar and bit into her neck, letting out a lustful moan as he made her cum. He slowed his movements as she tensed around his shaft, squeezing his hard dick tightly as she orgasmed, but he didn’t stop. She ordered him not to. The task was the keep fucking her until he could do any more. She promised she could keep up. When he slowed she glared at him, daring him to slow down.
He grabbed her and flung her around, shoving her against the wall with her back to him, her lab coat falling over her body. Percy wanted so badly to rip that coat off, but he had to admit there was something really sexy about fucking his doctor so he let her keep it, lifting the cloth over her ass aligning his cock back at her entrance. Frost bit her lip as she felt him tease her, grumbling about the pause until he took hold of her hips and speared her from behind. But instead of her pussy, he appeared to miss and penetrated her arsehole instead. “Fuck, yes, you naughty demigod. Fuck my ass!” She shouted, pushing against him until he pushing his elbows into her back trapping her against the wall.
“If you insist” he whispered in her ear, pounding her from behind twice as hard as before. She moaned painfully, his weight crushing her chest making it hard to breathe, but that made her get off even more. She loved a little pain with her pleasure. “Can I ask something?” Percy asked mid fucking.
“If you must, but you need to loosen up” she replied, gasping for breath when he removed his arms and wrapped them around her to grab her breasts. She hummed in approval when he squeezed and fondled her chest, pulling on her hard nipples before dropping on hand down to shove three fingers into her sensitive cunt, using the leverage to fuck her even harder.
“Can you both feel this?” He asked curiously. “Caitlin as well? I never asked how you two work.”
“We may be two different people, but we share the same mind and body” she explained quickly. “But yes, we are aware of what the other is doing. So if your asking if I could feel it when you came inside of Caity, yes I did. And yes, she can feel your thick cock inside our ass. Even if she couldn’t feel it, she can see it and is assuredly jerking herself off to us both right now.”
“Frost, don’t tell him everything” Caitlin’s voice squeaked inside her head, making the meta human laugh.
“Come on, we both know this isn’t the first time we shared boyfriends” she reminded her alter. “Or let each other watch. You can’t hide how aroused you are watching me fuck your patient, especially since it’s making me super horny.”
Percy wasn’t listening to the two of them argue with each over how weirdly sexy it was to be fucking the same guy at the same time. He was too busy making sure they both got fucked.
The exercise got much more hectic after that. They moved from the wall to the table, Frost was thrown across the top, her pussy stuffed full with cock. Percy pummelled her from behind, his hands gripping her shoulders tightly. A few orgasms later he spun her around, hoisting one of her legs over his shoulder to fuck her from another angle, grabbing a fist full of white hair mashing his lips against her neck. She moaned, her arms supporting her against the table as she balanced on one foot, her lab coat hanging off her elbows. By the time she climaxed again she could barely keep herself standing. Fortunately, the next position she found herself in was flat on her back on the table, legs spread suspended by her sides. Percy fucked her as hard as he could, arching his back putting great force into his thrusts, his iced balls slapping against her butt until it hurt them both.
By this point his cock was burning with pressure, desperate to cum, but Killer Frost’s ice powers prevented it. His sperm was frozen solid and his penis was closed with ice, blocking anything from escaping. It was starting to get painful, a pressure building in his groin begging for release. So he was punishing his doctor for it, hoping he could thaw out the ice and end this heated exercise with a bang. It didn’t help that Frost’s meta human abilities kept them and the room chilled, forcing the son of Poseidon to burn even more energy in this pursuit. He didn’t know how long he could keep it up for, his godly stamina already starting to waver.
Frost had no intention of letting him slow down though, riding his erection like a jockey as she sat up and bit into his neck. The young demigod hissed as she ran a cold tongue along his collarbone leaving a frosty line, kissing down his chest to suck and bit on his nipples turning them into icicles. She grinned wickedly as he retaliated by pushing her down against the bed, attacking her breasts with his teeth getting her squealing. Moments later she was hoisted into the air and impaled in the ass with a pair of hands clutching her breasts, her legs pinned behind her ears. They bounced together until her fluids were squirting all over the floor, her ass sore and red. “Is that the best you’ve got lover boy?” Frost teased.
“You like to talk, don’t you?” He replied, dropping the bruised and trembling young woman onto the floor giving her abused holes a break, grabbing her head in his hands. “Let’s give that dirty mouth of yours a real workout” he grunted, shoving his cock down her throat.
Frost barely had to pine to pull her lab coat back over her shoulders before she was deepthroating the teenager, her glowing eyes bulging out of their sockets as her mouth was stuffed. But she shocked him back taking it like a slut, lacking a gag reflex allowing her to suck and lick his shaft like an ice-lolly. Percy tightened his grip on her scalp, slamming her face against him faster, but she slackened her jaw and swallowed him further, even fingered herself to another orgasm in the process.
She gave the boy a few minutes to have his desperate fun before pushing herself free, slapping away his hands looking up at him. “Getting tired, or are you still up for more?” She asked. Caitlin was getting worried. They’d been fucking for over an hour and their body was starting to ache. Percy Jackson might have the gifts of a god but they were just a meta human, mortal limits. And longest fuck they’d ever had before now was a gangbang aboard the wave rider with the Legends, and that only lasted twenty minutes until Caitlin passed out. Frost had to submit to a lot of yoga to avoid that embarrassment again.
Percy gave her an indignant chuckle. “At this point I just want to cum. But my dick… it feels frozen solid.”
She gave him a look of mocking sympathy, stroking his hard trident before whirling him around. “Maybe we should try something else to get you warmed up” she said, an evil glint in her eye as she slapped his butt cheeks with her palms. She licked her blue lips as she locked eyes on her target, spreading his cheeks and diving into his anus with her tongue to lube him up. Percy gasped as her cold breath filled his colon, sending shivers up his spine as her tongue greased his insides while she collected all the moisture and fluids leaking from her pussy and froze them with her powers, growing a solid construct of ice from her crotch connected to her clit. By the time she was done and stood behind the boy, she had created a nine inch long curved penis out of ice aimed directly at his backdoor. Frost had been dying to do this since she was born.
She saw Percy shudder and inhale when she rubbed her new toy against his bum, the cold tip brushing between his cheeks. “Time to take this endurance test to the next level” she declared. Before she could let him object or protest, the frozen cock was shoved into Percy’s backside forcefully. He grunted through gritted teeth, his anus tensing as it stretched around the intruder, bracing against the table when he was pushed against it. Frost was surprised. She expected at least a cry or a scream, but the young man was quite accommodating to her cock. “This isn’t the first time you’ve been fucked in the ass, is it?” She grinned, reaching around his waist to simultaneously jerk him off as she fucked him.
Percy didn’t give the girl an answer, simply took the pounding letting her have her fun as she stuffed seven of her nine inches into his anus, her hand massaging his stiff erection along with it. After a while his silence gave way to moans and grunts, the cock sliding more easily as the ice melted and lubricated his passage. He pushed against her hips, riding her harder as she fucked him even rougher. She hoped she could fuck him hard enough to make his penis burst, but instead she ended up making herself orgasm, the frozen appendage rubbing against her clit.
She squirted into her hand, freezing her cum to make another cock of ice. She brought it up showed it to Percy, turning his head around to stare at the glistening dildo. “Here, have a taste” she suggested, slipping it into his mouth so he could suck on it. Then she brought it to her lips to share a lick, still jerking the boys cock as she put the new dildo into her own ass. Then she detached her fake cock from her crotch, leaving it stuck in Percy’s butt, hoisting herself back onto the table, pulling the groaning boy into a passionate kiss. “Still uncomfortable?”
“Yes” he replied, his tight anus holding the ice construct firmly just like hers was. But his penis ached and was beyond uncomfortable, so he didn’t wait for her to offer herself to warm it up. He grabbed her, threw her onto her back, pinned her arms by her side and forcefully penetrated her cunt. She squealed as he climbed on top of her, fucking her relentlessly as her legs wrapped around his hips, rocking against him as she playfully struggled in his grasp. But he wasn’t playing, not anymore. Now he just wanted to cum, grinding as much friction as he could to defrost his cock, his hips a blur of godly strength and speed.
“Frost, I don’t think you can take much more of this” Caitlin worried from the metahuman’s mind as the young woman’s movements got sluggish, getting weaker the more she climaxed, exhaustion starting to overcome her. Frost fought through the fatigue, her powers fluctuating from the intense pleasure ripping through her body with each of Percy’s thrusts clashing with his powers. Sweat levitated from their skin to turn into snow that drifted around them like a blizzard, the room temperature dropping as Killer Frost instinctively tried to draw in more heat. Percy ignored the cold, ignored the faint wisps of his breath blowing across the woman’s strained face, focusing on his energy behind his hips keeping her wrists trapped above her head. She was gasping for air now as he breathed heavily from exertion, feeling the ice break away from his penis inside her womb as their cores finally warmed up. Frost realized Caitlin might be right, black spot flashing across her vision on the verge of passing out, her body starting to ache and buckle, each orgasm becoming more agonizing as the boy fucked through it.
The second he felt relief, Percy yanked himself out of her battered pussy and ejaculated with a deafening bellow that shook the lab, red hot streams of sperm firing out of his dick triumphantly to spray Frost’s chest and face like a jet hose, drenching her in semen as she collapsed against the desk. Later she’d be disappointed Percy didn’t cum inside her pussy, but Caitlin would realize if he had it might have not only filled her womb to capacity it might’ve done serious injury to them both. Plus, at the volume Percy managed to empty in that glorious moment, there would’ve been no way to prevent getting impregnated. The threat of parenthood almost put Frost off sex for a month. So they were both happen to just take a shower in his cum instead, even when some of it spilled into her mouth and nose. By the time Percy slumped off the table, his cock limp and lifeless, his aching balls empty, Frost looked like a Jackson pollock painting.
It took both of them half and hour to get their breath back. Eventually, Caitlin managed to push herself off the table and sit up as Frost went dormant. She thought she might’ve drifted to sleep, leaving the good doctor to clean up as usual. She checked on Percy, who was recovering well considering the condition Frost put him in, before easing herself onto her bare feet. Her legs wobbled and she stumbled to the monitors to print the readings before returning to Percy to removing the sensors. “Thank you, Mr Jackson” she said meekly, nodding as she reviewed the results. “It seems your in perfect health, and excellent condition.”
“Does this mean I’ve passed my physical?” He asked, walking limply over to his clothing to redress.
She nodded, straightening the lab coat over her cum stained naked body. “You’re good to go” she told him, motioning to the exit with an embarrassed face. She turned her back and let him get dressed, waiting for him to get to the door before quietly adding “I should book you a follow up in about a week? Just to be safe.”
Percy glanced over his shoulder, giving her a cheeky smile. “Of course doctor. See you then.”
Caitlin smiled back, waving him goodnight as he left. “That’s my girl” Frost whispered.
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