Chapter Text
"So... Do you have a birthday?"
It wasn't the typical question one asked whilst sucking a cock, but then Ruby Sunday wasn't your typical girl. Not just because she'd been born and abandoned on Christmas Eve, or that she'd fought Goblins in a flying pirate ship to stop them from eating her baby stepsister. Not even because she was the travelling companion of an alien from another world who had a spaceship that looked like a box. No, one of the many things that made Ruby so extraordinary was that she was the Doctor's first. In his current body anyway. The handsome, dashing and daring bloke with a bright grin, fantastic taste in fashion and eyes you could get lost in. Not to mention a cock almost as long as her arm. A cock that she was currently resting her cheek against, rubbing the spit-soaked shaft against her smooth, rosy skin and relishing in the feeling of it throbbing against her.
The Doctor looked down at her, his gaze soft, his posture thoroughly relaxed as he reclined back into the chair. All around them, the control room hummed serenely, the console letting out the occasional bleep or bloop, when it wasn't drowned out by the chorus of wet glucks from Ruby as the Doctor's cock made itself at home in her tight throat. A particularly harmonious croon echoed from the time rotor, just as the ship's owner let out a languid sigh.
The fingers that had been stroking through Ruby's short golden locks slowed, as the Doctor squinted at her, a note of intrigue in his smile now rather than just pure pleasure. "Why d'you ask? You wanna know what I want for it?"
"I reckon I can guess already". Ruby chuckled, sitting up a bit straighter and shaking her chest just a little, enough to send her two large breasts swaying back and forth. She couldn't help but let a gleam of smugness cross across her face as they moved, enrapturing the Doctor's eyes almost hypnotically. Ruby wasn't a vain person, her mum and grandma had always made sure she kept a humble head on her shoulders, but even she wasn't immune to some pride when it came to the two huge globes of rosy flesh that sat upon her chest, impossibly perky even with their immense size. She knew she had a nice pair of tits, she'd received enough glances and the odd wolf whistle from both genders to know, and if she was honest, they might've been one of her favourite parts of her body too. Not too big to sag, not too small enough that you couldn't grab a nice handful and still have plenty to play with. And that wasn't even mentioning her nipples, twin disks of pebbled, pink peaks that became so very hard and pert when she rubbed them between her fingers. Just looking at them, your mouth couldn't help but water, salivating at just the idea of taking one between your lips, suckling like a newborn baby hungry for its mother's milk.
Even the usually uninfluenceable Doctor had felt that same yearning, the moment she'd snapped off the clip of her bra and let it fall to the floor, allowing her massive mammaries to finally hang free. Her nipples were still a gleaming, rosy (maybe even ruby) red from the liberal suckling he'd given them both earlier, a few thin trails of saliva rolling down across her underboob. He hadn't just been hungry for her areolae either, though, not when there was so much of her. After sucking her nipples to an aching hardness, he'd moved on to the rest of her plumpness, clamping his mouth down onto random patches of her jiggling, tanned flesh and kissing them hard, licking and circling around them until Ruby was a squeaking, writhing mess. A few times, she'd even felt his teeth, softly, slightly, pressing into her skin, making her cunt clench and her back to arch from the sensation, the thought of these gleaming white chompers he was always flashing about with his big bright smiles now being used to pleasure her.
By the time he pulled himself free from the valley of her cleavage, Ruby's wobbling tits had been totally transformed into the Doctor's personal canvas. Her once flawless, peachy flesh was now marked with burgeoning hickeys, the purpling pleasure bruises standing in marked contrast to the rest of her white skin. Both her breasts were coated in a thick of spit too, as if slobbered over by some huge, ravenous beast, literally dripping onto her belly as she hunched forward, gasping and sucking in deep breaths as she tried to regain a moment's lucidity after the non-stop pleasure that just moments before had been wracking her brain. The first thing she saw, as her half lidded eyes fully opened and the haze of pleasure slightly cleared, was the Doctor's grinning face, his tongue peeking out to dab at his lips, as if to catch any last trace of the taste of her nipples.
He wore that same grin now, even as he reached out and casually took of her breasts in his hand, squeezing her plumpness and making Ruby give a slight gasp. She responded in kind by sliding her own dainty little hand down his shaft to lightly cup one of his equally massive balls, beginning to gently massage the orb between her slim fingers. It was almost like a little competition, staring into each other's eyes as they stimulated the other's sensitive flesh, silently daring the other to break first. Ruby bit her lip, raising her eyebrows as the Doctor just continued to smile nonchalantly, his thumb starting to circle around her wet nipple. Around and around and around it went, the pad of his thumb rolling across the pebbled pink flesh, each pass sending electric tingles throughout her body, making her knees weak and the butterflies in her stomach flap all the harder. The hand squeezing his testicle shook all the harder as the Doctor reached the stiff peak of her nipple, a droplet of his spit still dangling precariously from its tip. He moved his thumb to hover over it, but didn't do any more than that, instead just... continuing to grin at Ruby.
She was confused, at first, until she realised with a start, what he was doing. He was giving her time to catch up. A burst of competitiveness flared in Ruby's heart instantly, and the delicate massaging of his balls that she'd been went up a notch immediately. The thumb which had been rubbing against one of the many veins twisting across the stretched sack began working a steady groove into his dark skin, the bucket loads of cum swimming about inside both fat nuts churning at her touch. Her other fingers closed around one of his orbs, only managing to take a single one at a time because of their sheer size. Ruby squeezed the Doctor's ball, harder than she had before, though still with the same gentleness to her touch that he'd become so enraptured by. She felt a bloom of vindication as she felt the girthy cock rubbing against her rosy cheek twitch against her skin, the head smearing more of the ample pre-cum dribbling from its tip across her face. God, this was it, she could feel it in her heart, she'd finally get one over on him. It wasn't exactly making him bust his load in just a few seconds of rubbing, like had happened with some of her other boyfriends, but still, this was the Doctor, unconquerable, undefeatable, a big grinning rock that no one could move unless he wanted to... Except her, Ruby Sunday, she was going to make him break and moan for her like-
The Doctor flicked her nipple and Ruby crumpled.
Sagging forward, a groan erupting from her throat, the young Mancunian felt an electric shock of pleasure go shooting across her, starting from the tip of her breast and travelling through every nerve in her body, the sheer power of it making her toes curl and her damp thighs squeeze together in a desperate, involuntary need. Her head hunched forward, blonde locks covering her eyes, her shoulders heaving as she took in a few hungry breaths. Silence hung in the warm air of the console room for a few seconds... before Ruby gave a defeated huff. "A-Alright, you win. I surrender".
The Doctor let out a low chuckle, giving her meaty nipple a few more casual swipes with his thumb that left Ruby quivering between his spread legs, whilst the hand in her hair gave her head a little pat. "No shame in admitting defeat, Rubes".
With a sigh, Ruby looked back up, still continuing to gently massage the Doctor's balls as she spoke. "You still haven't answered my question though. Have you got a birthday?"
He chuckled again, lightly. "Once upon a time, maybe. Why's it so interesting to you?"
The hand on her breast squeezed, and Ruby bit her lip, a hiss of breath escaping between her teeth. "I-I just thought... This all started on my birthday and you know basically everything about me..."
"Well..." The Doctor began, before stopping himself. The joyfully laid back expression he'd been wearing throughout this little "session" of theirs disappeared briefly, replaced by a deep frown, his dark eyes narrowing as a million different questions filled them. Even though he didn't say it out loud, Ruby could tell what at least one of them was: the identity of the woman who'd dropped her off on that church's doorstep, nineteen years ago. It was a question that burned in her own mind, all the time really, one she hoped might be answered one day, with his help. "Not everything".
"Nearly everything then". Ruby pressed on, moving her hands away from the Doctor's balls, instead wrapping her fingers (or at least trying to) around his cock, sliding it across her face and down between her heaving breasts, using her arms to squeeze them both together and trap his shaft between them. Doing her best to grab both her plump tits, the sheer volume of the tanned flesh spilling between her slim fingers, she began to slowly, casually slide them up and down the Doctor's prick in a gentle titfuck. He gave a low groan of appreciation, almost drowning out her next words. "And I don't know much about you, besides the basics. Doctor, TARDIS, Time Lord, screwdriver that doesn't look like a screwdriver... It'd just be nice to level the playing field a bit, yeah?"
The Doctor looked to his companion, pistoning her tits up and down his cock, her face taking on a more sombre note as her eyes flicked downwards, becoming focused on the way the dripping tip pushed between her cleavage, a few droplets of pre-cum smearing across her otherwise flawless skin. His smile turned gentler, the fingers stroking through her short blonde hair becoming even softer, as he reached out his other hand and cupped underneath her chin, turning her face back up towards him. His voice was warm, reassuring, and instantly made her heart squeeze. "Hey, I get it. I'm sorry. Secrets are... a bit of a weakness of mine. Trust me, I used to be even worse with them. It's just... I've lost a lot of people, Ruby, and they didn't always go willingly. Suppose my thinking is, the less I reveal, the less it'll hurt. That... never really works though".
Ruby slowed in her sliding, simply holding her breasts as they sandwiched his cock, her pink lips parting slightly as she stared at the Doctor. His own gaze had dipped down to her chest, but instead of the usual lust or awe, this was more... pensive. "But... I like to think I've learned a lot since then. Learnt to be... a bit more open. So, to answer your question, Ruby Sunday... I do have a birthday. Two actually. One I can remember the date of, and one I can't. As you can probably guess, I prefer to celebrate the former".
She nodded, understandingly, for once grateful that she was born and found on the same day, even if Christmas Eve did make it a bit of a nightmare to organize anything (not to mention the amount of presents was half what it could be). Her next question came slowly, hesitantly, mainly because she felt the Doctor's cock give a particularly strong throb between her mounds, his hips thrusting upwards, the tip just barely missing her chin. "And... What d'you do to... celebrate? I mean, I reckon I can already guess..."
The Doctor chuckled, tipping his head back and really chortling in that delighted way he sometimes did. "Oh, babes, you have no idea! The stories I could tell you..."
"Go on then". Ruby said, surprising even herself a little at how easily the words came, matching the Doctor's grin as she squeezed her tits together on her next pump to emphasise her words. Her own smile was daring, the gleam in her eyes even naughtier than usual. She leaned forward, locking gazes with the Doctor, her voice low and heated. "Tell me a story, Doc..."
If he was taken aback at her actions, the Doctor didn't show it. If anything, he looked bloody thrilled, laughing delightedly as he sat up straight from the lazed slouch he'd been in up until this point. His teeth flashed as he beamed at her, his hands moving to cup her face, his thumbs stroking across her sweat and pre-cum covered cheeks. "I will, Ruby Sunday, I most certainly will... But first, how about we get a bit more comfortable?"
He moved in a blur, almost too fast for Ruby to comprehend (a lifetime of running away from scary monsters would give you a bit more speed, she supposed), slipping his cock out from between her breasts and gripping her shoulders gently. He pulled them both to their feet, though Ruby did have to brace herself against him, her legs wobbly both from being on her knees for so long and because the sheer speed they were suddenly going at making her dizzy. One of the Doctor's hand supported her arms and pulled her closer to him, his prick slapping up against her smooth belly in the process, whilst his other hand dipped down lower for a cheeky little squeeze of her arse. The feeling of his fingers sinking into the jiggling, fat meat of her rear was enough of a shock to her senses to bring Rub back into the present, her first instinct being to match him pound for pound, closing her fingers around the cock currently rubbing against her belly button. They'd see how greedy his hands would be when she'd given him a few little strokes. Before she could, though, she was being thrown down onto a mattress that had appeared from... literally nowhere.
Ruby fell back onto it with a gentle thump, more surprised than anything else, though slightly grateful to have something soft underneath her after the hard flooring of the console room. She took a moment to make herself more comfortable, shuffling backwards a bit, stretching out her legs, really making herself at home. It was as she did this that she remembered the Time Lord standing over her. Looking up, the teenager instantly felt her breath taken away by the sight before, by the man looming above her. The Doctor, stripped of fancy leather coats and kilts and rainbow tops, just stood in all his bare glory, just like her, his muscled body gleaming with sweat in the dimmed light of the console room. She'd never really noticed it before they'd started this, just how... built he was. 'Course, she'd noticed he was fit (in more ways than one) even during their first meeting at that nightclub, seeing him twirling down on the dance floor like the world's most unconventional ballerina. The way he'd moved then, somehow both coordinated and chaotic at the exact same time, had been enrapturing to watch. She might have ogled him forever, if not for a sneaky goblin taking it's opportunity to send her gin and tonic flying. But then he'd caught it, and even whilst he'd been flashing his credentials with that psychic paper thingy of his, she couldn't help but let her eyes drift, just for a few seconds, across his arms, to his pecs, to the abs that strained against his yellow vest...
And now here he was, as naked as the day he was born, and Ruby took the opportunity to take in every detail she could. Every flex of his biceps as he crossed his arms, the undulation of his abs as he took in each breath, the way his mammoth cock swayed from side to side with every twitch of his hips... God, he was hard, wasn't he? She didn't think she'd ever seen a cock so stiff, with balls so full slapping between his muscled thighs, looking ready to bust at any moment, as he looked down at her. Ruby followed the Doctor's own captivated gaze, down across her own body, splayed out across the mattress, every inch of her tanned flesh on display for him. All five feet of her, with curves that would put supermodels to shame and lips that bloomed into the most enchanting grin as she realised just how much the Doctor was in awe of her in this moment. She couldn't exactly blame him. Stretching out her arms, she presented herself fully to him, in the lewdest pose she could think of, arching her back and pushing her tits out towards him. Her breasts sat perfectly atop her chest, both plump, round mounds of titflesh wobbling with every twitch of her body, her nipples still hard and damp from his earlier worships. Her smooth belly gleamed with a slimy splash of pre-cum, right across her belly button, whilst her godly hips curved around to a thoroughly fat arse that was practically made for being squeezed and slapped and thrust into.
Then, of course, there was the main attraction, tucked between her plump thighs. Topped with a trimmed, managed patch of warm blonde curls, her pussy lips glinted, the low light of the TARDIS catching the sheen of arousal that coated her cunt and smeared against her inner thighs from all the stimulation she'd been experiencing for the past several hours. Unconsciously, Ruby spread her legs, a move that had become almost second nature to her by this point. Her breasts rose and fell with each heavy breath she took, the anticipation of what she knew was coming next making her heart pound all the harder inside her chest. The Doctor, his face awe filled and silent, slowly got to his knees, putting a hand on either side of Ruby's head and bringing their faces in close as he steered his hips towards her entrance. The silence was warm, palpable and far too fragile for its own good... And was broken the exact second she felt the head of his cock lightly press against her folds.
"Oh, fuck..."
"Easy, Rubes". The Doctor breathed, his voice hoarse, a hint of gravel to it, which just made Ruby twist underneath him all the more, her entire body quivering with anticipation. "One... Two... Three..."
And suddenly, there it was, pushing inside and stretching her cunt to its limits, filling her in a way that no one else could ever manage. A powerful moan immediately erupted from Ruby, as she arched her back even more, pressing her tits into the Doctor's own chest. Their nipples fenced and sparred against one another, adding just that littlest touch more of electric pleasure to sprinkle atop the euphoria that soared throughout the rest of her body. She could vaguely hear the Doctor grunt above her, as he adjusted himself to the tightness of her pussy after the wet sloppiness of her throat and the squeezing softness of her tits. Soon enough though, she began to feel his hips begin to rock, back and forth, sliding just an inch out of her cunt before pushing it back in again. Then, it was two inches, then three, then four, until eventually his entire monstrous length was steadily pumping in and out of Ruby's pussy, stretching and filling her with every push, each thrust sending pulses and ebbs of pleasure throughout her body.
Just as with every other time she'd felt herself being rutted by the Doctor, Ruby lifted her legs and wrapped them tight around his waist, making sure the only way he could go was back and forth, thrusting into her again and again, whilst her arms wrapped around the back of his neck. Their faces drew in close to one another, their hot, heavy breaths meeting and mingling as they stared into one another's eyes. With each powerful thrust, their sweat streaked hips would smack together, the wet SLAP echoing throughout the huge chamber of the console room, bouncing off the curved walls and even managing to drown out the steady, ever-present hum of the TARDIS. It was joined by a chorus of grunting groans and whining moans from both the ship's occupants, Ruby letting out gasps and squeaks as she felt herself being pounded into with increasing power and speed, the Doctor with a heaving breaths and growled curses as he felt his cock being squeezed so sinfully tightly by his companion's cunt. It was like music to his ears especially, like fuel to an already raging fire, his lust and arousal for the girl beneath him getting all the more ravenous the more he heard her moan for him. He wanted more, he needed more, of her, of everything!
Ruby closed her eyes as she felt the Doctor's pace pick up even more, his thrusting going from a steady, powerful pace to an almost rabid blur of pounding and smacking hips, his balls swinging through the air with every pump to smack against her jiggling arsecheeks. Her breath was taken out of her at this speed of it all, she could feel her brain frying from trying to keep up with the sheer pace the Doctor was fucking her at. In that moment, Ruby knew what the best thing to do was, she knew how to survive this rampant ploughing of her crotch that she was experiencing. She turned off her brain and went with the flow. Keeping her arms and legs tight around the Doctor's hips and neck, she wiped any thoughts from her mind, stopped trying to comprehend the myriad of euphoric pleasures that had been making her so deliriously overstimulated, and merely basked in the feeling of being filled. She luxuriated in every throb and twitch of the Doctor's cock as it pounded in and out of her tight, clenching insides, her ears filled with the moist schlurping sounds of her sopping wet pussy lips being stretched and moulded around his girth. Her back arched and her large tits bounced as a new depth was plunged, another inch slammed inside, another smack of his balls into her arse echoing around the room.
This was her everything. Her entire reality, confined down to these hot and sweaty moments, her entire life contained within the desperate moans that erupted from her throat with every fresh wave of pleasure that washed over her. She spoke, in a ragged, hoarse and thoroughly delighted voice. "Fuck, Doctor... Yes! Fuck me... Fuck my... my tight fucking pussy... Fill me uuuup, please... God, yes!"
But despite his usual verbosity and penchant for milking every chance to talk he could, the Doctor didn't respond to her moans. This didn't perturb Ruby much, but she still cracked one eye open from their half lidded state look blearily up at him, as he stared down at her. The look on his face though... It took her by surprise, almost enough to break her from the pleasure induced haze she was in. Instead of a broad, delighted grin or a tooth clenched expression of intensity, he was staring at her almost... distantly, thoughtful, almost like he was... reminiscing. Ruby's brow furrowed in confusion, and her already open mouth opened a little wider, but her words morphed into an intensive moan as he suddenly buried his cock inside her in a particularly powerful thrust. As the rapturous pleasure arched through her body, any thoughts besides how good she felt swiftly disappeared from her mind, leaving her a drooling, wet mess, barely holding onto the Time Lord as he fucked her...
Stars above, she really was gorgeous, wasn't she?
Even he hadn't wanted to, the Doctor couldn't have helped but stare down at his companion as she writhed and twisted beneath him. Ruby Sunday, in all her tanned, bouncing glory, rocking back and forth on the mattress as her pussy was pounded into. Her mouth hung open, a seemingly endless stream of high pitched moans and guttural groans leaving her hoarse throat, her large, round tits bouncing back and forth with every push of his cock inside of her. Her blonde hair framed her cherubic face like a halo, a few strands of it clinging to her forehead with the sweat built up from all this activity. It was a heavenly sight, one that would leave most people gawping and tripping over themselves to lay their hands upon the angelic young girl laid beneath them. But as enchanted as he was by the sight of her, the Doctor had to admit he was... distracted.
Their earlier chat about his birthday had sent his mind whirling right back, back, back to the past. Not all of his thoughts had been pleasant of course, the mystery of his real date of birth prime still a dark, niggling frustration at the back of his mind, but they were outweighed by the amount of fond memories their talk had unearthed. Donna had asked him a similar question, while he'd been staying with her and the rest of the Nobles, during that little retirement of his. Not just cos she'd been interested in throwing him a party or getting Sylvia to bake him one of her "cakes", of course. She'd wanted to know which day to crawl her incredibly curvy body beneath his covers and wake him up with the sloppiest, wettest and greatest blowjob he'd received until that moment. Thus, a yearly tradition was started, for the entirety of his time with them. Sometimes Rose would take over for her mum, other times they'd slurp up and down his cock together. Occasionally mad auntie Mel would have a go too, squeezing his balls inside her mouth and suckling on them both like they were gobstoppers. He'd learned to anticipate those mornings like they were Christmas, settling down to sleep with a smile on his face and an erection straining against his pyjamas.
But that had just been the latest way he'd celebrated his birthday. As he pumped in and out of Ruby, the Doctor found his mind whirling back, way back, to all those past encounters with all those old friends of his. Ace lifting her skirt and letting him peel off her tights to reveal her bare, sodden pussy beneath. Vicki letting out a squeak of delight as he stroked along her tight folds whilst Barbara watched and pleasured herself. Peri bending over the console and allowing him to pull down her shorts, sliding inside her round, chunky arse and beginning to gently fuck her almost crushingly tight anus. So much, too much to comprehend all at once, even for him. It was only when Ruby let out a particularly roaring moan that he stopped trying to though, his eyes flickering open to behold her beauty.
But instead of Ruby's rosy skin and bright blonde hair, he was instead greeted by flawless brown skin and shining black hair, a pair of brilliant brown eyes gazing back up at him adoringly. Yaz smiled, her lips as plump and perfectly kissable as the last time he'd seen her, gazing out across that park, before another groan erupted from her mouth. The Doctor blinked, and suddenly, the moaning face beneath him was pale and round, framed by long, brown hair. Victoria's shapely body writhed under his, every thrust of his cock into her drooling pussy and each smack of their hips sending her rocking backwards, making her massive teenage breasts wobble. He felt compelled to reach out and grasp them, but as his fingers sank into the spongy flesh, he found the tits he was trying to grope had shrunk dramatically, replaced by a pert, if still plump chest with gorgeously hard and perky red nipples. Romana (the second of her, from the pink lips and long blonde hair) gave a light hiss as he squeezed one of those nipples between his fingers and gently twisted them, the sudden clenching of her cunt around him sending a new bolt of pleasure through his body.
He heard her gasp out a single word, "Doctor", and it was as though it had been said by a thousand different voices, most of them women, in every manner of tone and accent. Loving, angry, lustful, sorrowful, relieved, joyful. English, American, Scottish, Australian, Irish. Dozens of different people all whispering and groaning and moaning and shouting his name, over and over again, melding and mixing with gasps and whines and screamed curses, as the pace of his thrusting became faster and faster and faster. His hips became a blur as his back hunched and his head sagged, his eyes squeezing shut as the person beneath him changed with every pump of his cock inside of them, almost becoming a blur themselves, swapping skin tones and hair colours and body shapes faster than he could adjust. Skinny, plump, lithe, curvy, short, tall and everything in between. But even as he clenched his eyes closed, the Doctor could still feel it, squeezing around his pounding cock, the pussy he was thrusting into changing with every pump. Slippery and loose, sinfully tight and wet, hugging and damp. Sometimes it wouldn't even be a vagina at all, instead becoming the unmistakable clench of an arsehole around him, the grunts and groans in his ear taking on a decidedly more masculine sound. The breasts he was squeezing and rolling in his hands shrunk and swelled and bounced and swayed, the nipples going from meaty to pointy to pert to tiny, all in the span of a few seconds.
So much, so many, a hundred at least but undoubtedly more. Everyone who had ever graced his bed, replaying themselves over and over and over again right now, in this moment, writhing and moaning beneath him as if they had never left. Nyssa, Katarina, Rose. And still he fucked them faster. Romana I, Charley, Gabby. Faster and faster. Missy, Cinder, Bliss. In and out and in and out and in and out. Adric, Amy, Bill. Fucking and fucking and fucking and fucking and fucking and fucking and fucking and fuckingfuckfuckfuck. Polly, Hebe, Sarah Jane, Izzy, LivHelenJamieLizSaraZoeGraceLucieBennyEvelynMargaretDonnaValarieOsgoodRozAliceKate-
And then the hand on his neck changed again, solidified, held, its form not changing for the first time in what felt like forever. It was such a contrast to the constant transforming that it sent a shock through the Doctor's whole body, making him freeze entirely, his cock buried up to the hilt in whoever's orifice this was. Slowly, almost hesitantly, he blinked open his eyes and beheld... a smile he hadn't seen in centuries. A smile on a face that he hadn't looked upon for thousands of years, with short, black hair and twinkling blue eyes and smooth, pale pink skin. His eyes dipped down lower, to a young, shapely body, with large, plump breasts and a pert, fat arse grinding into the mattress. A body he had first beheld back when he'd been a much younger man, with long white hair and a penchant for clutching his lapels. The Doctor looked back up, and found himself sharing his granddaughter's smile. The arms around his neck pulled him in closer, to where her warm breath tickled against his earlobe, as she whispered a single word, just like all the others. Except, not.
"Grandfather..."
And just like that, everything the Doctor had been holding back was released in a single moment. With a great roar ripping from his throat, he slammed his cock forwards in one final thrust, before mashing his lips into Susan's in a kiss over a billion years in the making. His fat balls slapped into her jiggling arse, the tightening he felt inside of them the only sign he had before the cum churning inside them was unleashed inside her squeezing, wet insides, painting them a thick virile white, filling her to the brim and overflowing from the sheer volume of it all. The Doctor groaned into the kiss, the sound long and hard, swallowed down into his companion's throat, straight down to her hammering heart. The pleasure crashing down over them both was overwhelming, all-encompassing, and awe-inspiring. It was the culmination of everything, not just this single session of sex, but what felt to the Doctor as centuries of build up. And Moons of Gallifrey was it worth the wait!
Finally, eventually, his balls were drained and his cock was soft and slowly but reluctantly, the Doctor pulled himself out. His eyes had been closed throughout his explosive orgasm, and as they fluttered open now, he looked to his granddaughter, a witty little line already forming on his tongue... When he saw Ruby laying where Susan had, splayed across a mattress that was by now thoroughly soaked with sweat and juices. The teenager's entire body was spread eagled, her legs far apart to reveal a pussy stretched and used, utterly drenched in creamy, pale semen. A few smears had even gotten as far as her belly, some droplets even having flown as far as her breasts, which rose and fell heavily with each deep breath she took into her throat. Besides her breathing, Ruby's face was utterly vacant, her eyes staring blearily up at the ceiling as her brain no doubt tried to rewire itself after being so thoroughly melted by the multiple body-wracking orgasms she'd just enjoyed. It was only after nearly a minute of just laying back and catching her breath, that she finally seemed to realise that he was staring at her.
Slowly, shakily, she sat up, letting out a quiet groan as her sore muscles were put to work after lying down for so long. Her breasts swayed, a thin sheen of drying sweat gleaming on her skin. They stared at one another for several long seconds, Doctor and companion, neither seeming to know what to say... Until she laughed, suddenly and abruptly, a splutter of a giggle escaping her lips. The Doctor's eyes widened, but then he found himself smiling too, then chuckling, then full on belly laughing. Soon, the two of them were just cackling, tiredly but delightedly, as they basked in the afterglow of their respective climaxes. It was in this euphoric mood that Ruby was the first to speak, saying between hiccups of laughter. "That... That was... Wow... I knew you were good, but... wow".
"I'd consider that a pretty glowing review". He said in return, his grin turning to more of a smirk. Ruby rolled her eyes fondly.
"Yeah, yeah, mister, just don't let it go to your head. Can't have that ego of yours gettin' any bigger, or it'll take you off balance". She drew her knees up to her chest, leaving a trail of slowly draining cum across the mattress. Her expression slowly turned more curious. "Seriously though, I've never seen you like that. What happened?"
"Just..." The Doctor's own smile turned softer, gentler, and somehow even warmer. "Some ghosts of the past".
If she was confused by this, Ruby didn't show it. Instead, she suddenly rolled over onto her belly, presenting the graceful curve of her back and the meaty mountains of her fat arsecheeks to him. She looked over her shoulder, an expectant look to her face, as she kicked her feet invitingly. The Doctor, however, raised an eyebrow. "Now what is this?"
"What do you think?" Ruby smirked, a fresh glint of lust alighting in her eyes. "Round two".