The chapter
It was another beautiful day in Ponyville with the sun shining and ponies smiling. Foals were playing in the park and the market was busy with the afternoon rush. It was also another long day for the Princess of Friendship, ever busy with spreading friendship and happiness across the town and Equestria at large. Twilight was on her way back into town after dealing with a pair of farmers who needed a bit of Princessly intervention injected into their dispute.
After a couple of hours of talking, and more than a few glasses of lemonade, the issue was resolved. Both farmers agreed to Twilight's balanced resolution, offering something important to each and getting them to yield on the smaller issues. It wasn't easy to do but the Princess of Friendship was up to the task. Now on her way back she had another task to take care of, using the restroom. She was glad her ascension came with a bigger bladder or she would have needed to rush to a restroom in the middle of the tense negotiation, which would have almost certainly made the situation worse.
With her castle on the opposite side of town from her Twilight opted to find one of Ponyville's public restrooms. In Ponyville a public restroom was a large single room where ponies did their business. Where they did it, either on the floor, walls or another pony, didn’t matter. The odd restrooms worked well with Ponyville’s “Sexual Liberty” law, which was why Twilight wasn't too surprised to see Cloudkicker and Thunderlane going at it in the alley beside the public restroom.
Twilight pointedly focused on the door to the restroom and suppressed her desire to join them. She need a restroom not a rutting and she was really starting to feel the pressure in her bladder. Pushing the door open revealed the empty white tiled restroom just waiting to be used and use it she would. The princess of friendship walked out into the middle of the room as her tail started hiking up on it's own.
Golden urine began to flow from Twilight as her lower lips parted slightly. With a sigh from the purple alicorn her stream became stronger, arcing out a couple of feet and spreading her golden pee across the floor. Quickly a puddle formed and the sound of piss hitting the ground was replaced by the sound of liquid landing in a puddle. As she pissed trickles of pee streamed down her leg, wetting her fur and leaving a tiny golden puddle at her hooves. All while Twilight was lost in the euphoria of release, oblivious to the world around her.
While she was peeing a couple of ponies walked in, Lyra and her marefriend Bon Bon who both stopped to watch Princess Twilight's golden show. Which Twilight unknowingly indulged them in as her stream started to waver in pressure as her bladder neared empty. Slowly the stream lessened leaving a trail piss leading to Twilight until the last of her pee trickled out and into the puddle at her hooves.
Twilight sighed in relief and moved towards the clean up shower near the entrance. Only, once she moved she notice that she wasn't alone. She stopped to watch as Lyra lifted her tail and Bon Bon moved her snout right up behind Lyra's marehood. Twilight was puzzled until the first splash of Lyra's pee landed on Bon Bon's snout and the cream colored mare opened her mouth. The sound of Lyra's piss filling her marefriends snout sent a surprising shiver of arousal through Twilight. Once Bon Bon's snout was full she swallowed, getting a bit more pee on her face in the process, before opening her snout for more.
Lyra finished relieving herself into Bon Bon's mouth well before her marefriend would have needed to swallow. Still the cream mare swallowed what Lyra gave her before moving her snout up to Lyra's ponut. With little hesitation Lyra started pushing out a horseapple into Bon Bon's mouth and all with Twilight watching them. Twilight was both aroused and disgusted by what she saw as Bon Bon slowly chewed and swallowed Lyra's shit. Yet Twilight couldn't help but move a hoof to her nethers and start rubbing her marehood.
Bon Bon took her time chewing Lyra's shit, tasting the bitter and vile flavor before she licked her marefriend’s ponut to let her know she was ready for more. Swiftly a second horseapple filled her mouth, just as bitter and vile as the last but she set to work eating it as well. All while a purple hoof rubbed against it's matching vagina. Twilight watched Bon Bon as she chewed Lyra's waste, rubbing faster with each swallow as Lyra fed her marefriend more.
After a bit her hoof wasn't enough; Twilight needed something more. Her magic formed a cock shaped apparition and she started fucking herself with it as Lyra struggled to push out one last horseapple. As the magic cock rapidly pounded her, Twilight slipped into a fantasy. No longer was she just watching, she was the one being used as a toilet.
Golden piss flowed from a set of soft white pussy lips, filling her mouth with that acrid taste. Slowly filling from the back of her mouth the piss gathered until she had no choice but to swallow or waste it. She gulped it down and got her snout soaked before she could open her mouth again. Once more her mouth was filled with piss until it flowed out and down her chin. She swallowed and let the last of the piss from those white lips arc out onto her face. She was ashamed but also incredibly aroused, although her work wasn't done as she moved her snout up to the puckered white ponut.
Her next duty began with a kiss to that ponut. She kissed and licked it and with effort pushed her tongue gently into it. Though her ministrations were welcomed that wasn't her duty which became obvious as that white ponut expanded as a horseapple started to be pushed out. The bitter and vile earthiness of the shit filling Twilight's mouth was matched by the euphoria of sexual pleasure she was feeling as she chewed on it and when she swallowed it her fantasy world shattered into a million orgasmic pieces.
Twilight's cries echoed in the restroom as her climax hit her like a train. Her juices coated the magic cock and dribbled steadily onto the floor as she rode out the waves of pleasure from her orgasm. Her orgasmic high didn't last however and soon reality came thundering back, bringing a blushing Lyra and Bon Bon with it. Twilight was absolutely ashamed at her actions but Lyra and Bon Bon didn't mind, they even offered for her to come over and learn all about it. Twilight accepted and after a quick clean up at the shower they set off to explore their shared kink.