serious fetish stuff is going on here
the chapter where the story happens
You tease her peehole until she is leaking pre-cum and you make her squeal and moan with pleasure. You start with one finger, and slowly insert more as her cock becomes nice and slippery with her pre. She is begging for more at two fingers, and once your whole hand is in, fisting her urethra, she babbles about how good it is. At this point, you pull your hand out, place your throbbing cock at the opening of her dripping peehole and push, slowly, until your entire member is inside her.
As soon as you hilt inside her cock, there’s a wet squelching noise as a fat wad of pre spatters out around your dick. her knees wobble as her mouth gapes open, panting heavily as she pleads for you to use her body, to pound her urethra like a living sex toy. Back legs trembling, you notice a spluttering noise as she winks hotly, gushing out a good pint of mare juice from her swollen cunt.
You continue thrusting into her tight slippery cock, pushing all the way into her bladder until the sensation of your cock pressing against her prostate finally pushes her over the edge. With a loud gasp of pleasure, her knees go weak and her marecunt starts winking uncontrollably, shooting long squirts of gooey marecum onto your belly as you continue to thrust into her throbbing cock while feeling it squeeze your shaft as it tries desperately and unsuccessfully to ejaculate her semen around your cock.
With each thrust, you feel the delightfully warm piss in her bladder sloshing against the tip of your cock and her prostate contracting tightly around your cock as it tries to expel its contents.
You have the perfect view of her clenching folds as they hose down your front and drool heavily all over her balls, your pony writhing in orgasm. Her prostate and urethra pulse and throb hotly around you, stimulating you like nothing else as your cock blocks off the only exit for her viscous cum. You feel it squeezing tightly around you as the pressure of her cum builds up against your cock. A little leaks past, a hot jet of silky spunk rushing along your cock to add to her piss-filled bladder. She whines and moans your name as she cums around your dick, begging you not to stop; to push through her climax and stretch out her insides with your cum; to let her feel her own bladder bloat with that lovely mixture of both your and her cum and her musky piss.
You enjoy the feeling of her cock clenching around you as she cums again and again, unable to evacuate her balls properly. Her bladder, now filled with a mixture of your cum, her cum, and her piss, slowly fills up as her cum leaks in, filling her to the limit and amplifying her pleasure with every thrust inside her bursting bladder. As you fill her bladder with your cum she pants and mumbles in pure pleasure, the feeling of your spurts sloshing her piss around, prolonging her orgasms and making her drool slightly. When you relax and begin to push the contents of your bladder into hers, she coos and shudders, cumming again at the thought of her visibly stretched bladder now holding not only your cum, but your piss as well. As you empty and slowly pull out, she exhales sharply once you pop free of her prostate, several orgasms worth of pent-up cum shifting inside her and gushing hotly into her nearly-bursting bladder. She lets out a little strangled cry as the sensation pulls yet more cum up from her heavy balls, making her rear legs pull together as she tries to hold it all in. as soon as you dislodge from her gaping urethra, she grunts and moans in relief, a deluge of piss and cum cascading out of her gaping dick. It takes a full five minutes of pissing hard to empty, the whole time she’s breathing hard and whispering about how full she was and how thankful she is to be pissing and cumming for the both of you. She looks over to you when she’s empty, a little fatigued, but still eager to continue if you have plans to further toy with her body.
Deciding to give her abused futa cock a rest, you decide that it’s time to give her other urethra some treatment. She smiles as you place your hand on her swollen cunt lips, kneading and massaging them until she starts moaning and cooing with pleasure. Soon ready to go again, she gets back on all fours and lifts her tail, presenting her swollen leaking marecunt to you and making wet squelching sounds as she winks and squirts a trickle of musty marepiss onto the sheets. The sight of her winking and squirting cunt gets you rock hard instantly.
Knowing what you have in mind, she trembles in anticipation. As she prepares herself for you to stuff your cock into her bladder from her other urethra, the thought of feeling you fill her with your cum gets her winking even harder. She asks you timidly if she can pee out of her cock as you fuck her so she can spray out your cum as if it were hers, further marking her as yours.
Wanting you both to get the maximum enjoyment out of it, you tell her to try holding it in until you tell her she can go. She smiles and says she’ll try. You position yourself behind her, and spreading her swollen lips with one hand, you tease her cute little peehole with your finger, lubing it up with her own cunt juice before gently pushing it in, eliciting a moan of pleasure as your finger slides into her bladder. The wetness inside tells you her body is already hard at work filling it back up.
She always prided herself on being a well-hydrated pony, and this is the primary reason. If properly stimulated, she’s more than capable of filling. As you probe around with your finger, she asks you if you like what you feel. She tells you she’s doing her best to get a nice warm bath prepared for your cock and she can’t wait for you to ease into it and make her tub overflow. Her winks of anticipation are matched by a splatter of pre from her still-gaping dick.
More aroused than ever by her dirty talk, you ease another finger into her urethra, stretching it more and making her squirm with pleasure. Once confident that she is sufficiently lubed up, you slip your fingers back out and smear the remaining marejuice from your fingers around your rock-hard cock. Inserting one finger into her urethra to stretch it open, you slowly ease your cock into her peehole, stretching it further than ever. Once the tip is inside, you remove the finger, and with a firm thrust, you hilt yourself inside her warm, wet bladder, making her gasp with pleasure. Placing one hand on her flopping horsecock, you start rubbing it softly while pounding her stretched vaginal peehole with your cock, enjoying the feeling of her warm, wet marepiss sloshing around with each thrust.
She squeals and moans hotly as you pound into her bladder, her musky piss soaking your dick and warming it lovingly. She starts to lose her composure again, babbling your name and begging you to stretch out her bladder and swell her again with all your juices. Your hand gripping the base of her dick both pushes her closer to orgasm and reassures her that should her body fail to contain itself, you can always squeeze her shut. The way her balls churn hotly as yours slap into them tell you she’s close to cumming already, the intimate thought of sharing your piss and cum in her bladder making her so easy to please.
As you continue fucking her pisshole, you quickly feel yourself getting closer to orgasm, and her quick breaths and moaning tells you she’s getting close too. Suddenly, she lets out a loud gasp, and you feel her urethra contract around your shaft. Wasting no time, you quickly squeeze the base of her throbbing horsecock shut, just in time to block a huge load of cum, causing it to flow back into her bladder. The feeling as her gooey cum mixes with her piss and forming lumps finally sets you off, and you unleash load after load straight into her bladder. With nowhere to escape, her bladder quickly fills up, and its contents begin to seep out around your cock with each powerful thrust.
She grits her teeth as each spasm of her balls sends a jet of hot cum swirling around in her bladder, your cock in the perfect position to feel each gush rush against it. When you join her in gritting your teeth, your erection throbs inside her female urethra as she cries out a shuddering “Yes!” before panting and moaning, the flow of her cum increasing with the sensation of your cock inside her and the incredible pressure inside her bladder. As soon as she feels some of the milky fluid leaking around your spasming dick she winks hard and tenses as best she can, both giving you a tighter hole to fuck and keeping as much inside her as possible. once your many orgasms die down she’s panting heavily, her back knees bent inwards in desperation from all that fluid inside of her. She asks you if that’s all you’ve got for her, or if you have some other need to release, another gift to give her. She tells you how eager she is to feel you marking her insides once again, to carry all your excess and drain you properly.
Without hesitation, you try to relax, and eventually manage to squeeze out a few squirts of pee inside her before releasing and emptying your bladder into her. Towards the end, spitfire is so full that you have to push hard to keep it all from going up your urethra and into your bladder, and she gasps and twitches as each new squirt of pee inside her induces an orgasm in her. As you bare down to push the last few squirts of piss into her bladder, she’s delirious with pleasure, thanking you over and over even as the pressure prevents her orgasm from ever reaching her bladder. When you’re finally out of juice, she’s panting and sweating heavily and begging for release. Deciding It’s time, you release your grip on her cock and start to stroke it gently, feeling the pressure inside her bursting bladder decrease as it empties itself, pouring uncontrollably out of her floppy horsecock and making a mess all over the bed. When you ease up on her marecock, she shudders and exhales in relief, her urethra yawning open and being stretched even more by her forceful spraying of that cloudy yellow mixture of your shared piss and cum. As you gently pump her unloading shaft, you lean forward and whisper in her ear, telling her to just relax and let all that pent-up juice just gush out. She mumbles and her back legs squirm as the flow lessens for a moment, as the sensation of all that fluid rushing through her urethra and your tender words push another orgasm through her body, thick ropes of urine-laced cum erupting hotly onto the bed for a full minute. You can feel the pressure in her bladder build as the staunched flow causes more of her own piss to collect inside of her. Before her orgasm abates completely, her internal muscles give way and her last spurt simply goes on and on as the stream pouring out from her gaping piss-slit turns from milky white back to cloudy yellow. You both collapse from exhaustion once she’s fully drained, and she cranes her head around to give you a passionate kiss. She thanks you one last time before snuggling in to be your little spoon, the both of you drifting off to sleep with your cock still plugging up her marecunt’s urethra.
