Title: Mommy's Special Surprise Author: teepee Pastebin link: http://pastebin.com/XxH72hyR First Edit: Wednesday 18th of June 2014 04:32:29 PM CDT Last Edit: Wednesday 18th of June 2014 04:32:29 PM CDT "Mommy has a special surprise for you tonight, sweetie." his mother's whispered words echoed in Button's mind as he made his way to her bedroom. Until recently, their relationship had been a fairly ordinary mother-son one, but that had all changed the day he found an old porn DVD in the attic. Out of curiousity, he had taken it down to his room to find out what it was all about, and found to his shock and surprise that the female star was none other than his own mother. She had walked in on him masturbating to a scene of herself urinating on a stallion, but instead of punishing him she had ended up having sex with him for the first time that very night. What had at first been a very embarrassing situation had turned out to be the best thing that ever happened to him. From that day on, whenever the two of them were alone in the house together, they would often have sex, and even as she went about her everyday housework he could tell his mother was happier than ever before. His father and brother knew nothing of their special relationship, and they had decided that it was best to keep it that way.   Tonight was going to be one of those nights. His father was away on a business trip, and his brother would be sleeping over at a friend's house. It was going to be just the two of them alone together in the house all night. Normally on these occasions, neither of them had felt the need to say anything to the other or make any plans beforehand - they both knew what the other had in mind as soon as an opportunity arose. This time, however, his mother had whispered into his ear earlier in the day, telling him she had a special surprise for him tonight. She had seemed even happier than usual. He had been wondering all day what this special surprise could possibly be, and now he was about to find out.   -------------   Button Mash stood outside his mother's bedroom door, his heart pounding with excitement. Slowly, he turned the handle and pushed the door open to reveal his mother lying in her bed. As soon as she heard him enter, she rolled over on her back, spreading her legs and looking at him with half-lidded bedroom eyes. In other words, nothing out of the ordinary so far.   Without hesitation, Button cantered over to his mother's bed and got onto it, positioning himself directly in front of her and looking down at her between her hind legs. "Mommy's got a new hole for you to play with tonight, Button!" she told him just as he was about to ask what the special surprise was. "A very special hole that even your father hasn't gotten to play with..." she added in a seductive voice.   Raising her hindquarters slightly, she reached around her thighs with her front hooves and pulled her vulva apart, exposing her pussy to her son. Or so he thought, until she readjusted her grip and stretched her hole even further. As he stared down into his mother's gaping hole, he realized that he could vaguely see the reflection of the light on the surface of a body of amber liquid inside.   His mother chuckled as she saw the look of puzzlement in his face. "It's where I pee from, sweetie." she explained. "I've been saving up all day, just for you." she added in a soft seductive voice.   Button's jaw dropped in astonishment as he realized that he was staring directly into his mother's piss-filled bladder through her peehole - which was now gaping almost as wide as her pussy. Even though she used to pee on him all the time, he had never seen her peehole stretched open like this before.   "I've been practicing for a long time on my own to be able to stretch it enough to fit a stallion, but I was only recently able to stretch it this far." she explained. "Big enough for you, sweetie."   --------------   Soon rock hard at the sight of his mother's gaping peehole, Button positioned his cock at her opening and with a gentle push it slid inside. His mother gave a loud moan as his stallionhood bumped against her urethral sphincter. "Oh yes, Button! Don't stop! Go all the way inside! Mmnn~" she cooed, her breath heavy with arousal. He continued to push, increasing his pressure until finally he felt his cock slip past the tight muscle guarding her innermost depths and bottoming out against the back wall of her bladder. As soon as he entered her bladder, he felt her warm urine engulfing his shaft and forcing its way out around him to make space for the foreign object now pushing its way inside. A loud gasp escaped his mother at the overwhelming pleasure of feeling her son's cock penetrating her final frontier and going where no stallion had gone before.   The sensation of his mother's tight sphincter massaging his shaft was out of this world as he began to thrust in and out of her bladder. Her entire body was shaking from pleasure, squirming and moaning as he fucked her tight pisshole, warm amber urine gushing out with each forceful thrust. Button had never felt anything like this. So tight and wet. He felt the piss sloshing around his cock inside her with every thrust. He felt his body going weak with arousal and pressure building up in his loins as he neared an orgasm.   ----------------   "Yes Button! Fuck mommy's pisshole and cum inside!" his mother cooed as he continued to fuck her tight pisshole, pounding against the back of her bladder. The sound of his mother's voice uttering those words were too much, and he felt his mind go blank momentarily and his knees go weak as an explosive orgasm shook his body. He heard his mother gasp and moan under him as his cock flared inside her and began sending load after load of thick cum splattering against the back of her bladder. The sensation of her son's cum splattering the insides of her bladder was too much for her, and Button felt urethra and sphincter clenching down on his shaft harder than ever before as she came, her bladder clenching around him as if trying to piss his cock out. Feeling his mother's orgasmic spasms against his, and the sensation of gooey marecum splattering his already piss-soaked balls sent Button into another orgasm before the first one had even ended.   Exhausted, he slumped down resting with his body against his mother's soft teats, and the two ponies lay panting in post-orgasmic bliss. As he began to regain his breath, Button suddenly realized that he needed to pee urgently.   --------------   "Don't hold it in. Fill me up, sweetie." his mother said suddenly, as if she knew exactly what he was thinking. Without hesitating he complied. Another moan escaped her muzzle as he opened the dam, flooding his mother's bladder with fresh piss until the pressure inside became too great and he found himself unable to get any more out. Judging by her moaning and squirming, she felt the pressure too, and soon he felt her bladder clenching down on him again, trying to piss him out, slowly forcing their fluids back up his urethra until finally the seal broke and a murky mixture of cum and piss began to ooze out around him. The sensation of their fluids forcing their way up his urethra and around his shaft, and her bladder forcefully squeezing against the tip of his cock finally sent him into another orgasm, forcing another load into her mother's tight cavity.   As he pulled out, having regained his breath, the remnants of their lovemaking poured out of her gaping peehole and onto the already drenched sheets below.   Knowing that they would be alone until the next day, Button let himself drift off to sleep, his mother spooning him.   THE END