This chapter was requested by an anonymous fan. Hope you enjoy this!

CW: Aged-up Spike/Princess Twilight/Starlight Glimmer, M/F/F, peeing together, peeing in front of girls, voyeurism, exhibitionism, semi-incest (Twilight and Spike are basically siblings, you know), farting, Starlight liking the dragon meat

"So, here we are!" Twilight announced as they entered their hotel room, "We've got plenty of time before the event. Now we're free to relax!"

To her surprise, Twilight had been invited as a guest of honor for Manehattan ScienceCon. She had decided to take Spike and Starlight along, and now they had finally arrived to their hotel.

"Sounds good," Starlight said, "I'm going to draw a bath. My legs are killing me!"

"Right," Twilight looked at the time, "I need to check my notes before the event, just to be sure. Spike!"

"At your service, Twilight," Spike replied and grabbed their luggage from the floor, while Starlight went to the bathroom to prepare her bath.

---

"Starlight?" Twilight knocked on the bathroom door.
"Yes, Twilight?" She heard Starlight answer behind the door.
"Umm... I think I need to use the bathroom!" she said and blushed, "Can I come in?"
"Sure, go ahead," Starlight replied, "The door isn't locked."

"Why, thanks Starlight!" Twilight beamed and entered the bathroom, "I didn't even notice how badly I need to pee!"

Once entering, she saw Starlight lying in the bathtub, resting her head against the wall in relaxation with her eyes closed. She then glanced at the sink next to them, seeing something in it.

"What's up with the sink?" She asked in confusion.

"Oh, I'm just washing my scarf," Starlight replied, "Nothing special."

"Okay," Twilight shrugged and sat down on the toilet. Almost immediately after sitting down, her urine started to shoot out with a loud splatter.

"Mmmm," Twilight purred and relaxed, adjusting her position. She managed to let out a couple of small farts while flexing her abdomen.

"Oh, sorry..." Twilight grinned nervously, making Starlight smirk.

"Are you sure you weren't crowned the princess of pooting, Twilight?" she asked teasingly and chuckled while Twilight buried her face behind her hooves, "Don't worry, I'm not going to tell anypony!"

"You better not," Twilight replied, "Because if you do, I'm so going to send you to the-"

"Starlight! Can I use the bathroom?!" Spike suddenly stormed into the bathroom, "IT'S EMERGENCY!!"

"What?" Twilight jolted in fear. She halted peeing and squinted her legs more tightly together to cover herself. "Can't you see we're in here, Spike?!!"

"I- I don't know what happened!" Spike replied with a worried tone, "I just suddenly felt like I needed to pee!"

"Hmm, that's odd..." Twilight thought for a second and then replied in frustration, "Well, could you wait a moment until I'm done?"

She started urinating after a brief break. Sounds of her tinkling didn't help Spike at all.

"I... I don't know if I can hold it much longer..." Spike stammered with crossed legs, his eyes searching around the bathroom for a place to relieve himself.
The sink was off-limits, so was the bathtub. No trash can. The only place he could pee was...

Spike made a quick decision to put his shame aside. He stepped in front of the occupied toilet, grabbing his dragon tool with his fingers.

"SPREAD YOUR LEGS, TWILIGHT!" Spike commanded furiously, making Twilight jolt.

"Wha... No, Spike! What are you...?!!" Twilight protested, not amoused of the way Spike aimed his turgid draconic penis at her lap.

"I can't hold it anymore!! I gotta... Gotta! Aaaaaaaaaah..."

Spike let out a relieved sigh as his stream of urine started to spray out of his urethra in high pressure, hitting Twilight in the lap, creating a puddle between her legs in the process. Twilight got shocked and spread her legs wide apart in panic, revealing her still-pissing marehood to Spike. His piss rumbled like a thunderstorm as it hit the water below along with Twilight's release, making it bubble rapidly.

"Oh my... Now that's something you don't see everyday!" Starlight cracked, seemingly impressed by the sight before her. She was delightfully impressed by Spike's length, her eyes feasting in every new details of it: its dark pink color, small spines on its back, a knot that was partly hidden behind Spike's fingers. His 13 inches long shaft was thick and bulging, ending with a round, delicious-looking glans at its tip.
"You REALLY had to go, Spike!"

Spike didn't answer, he was in such a bliss. He had closed his eyes in relief, not caring about doing something so intimate and private in front of his female peers. He also tried to respect Twilight's modesty and not look, but having his eyes closed made his stream drift away from the center of the toilet, soon hitting Twilight's labia.

"No no no no!! Watch it, Spike!" Twilight yelped, while Spike turned his gaze back to his dick in panic to correct his aim. He was now staring at Twilight's gushing pussy, her lips being parted by her winking clit. She had gotten aroused by the action!

Twilight squinted her eyes tightly shut and tried to drift away from the reality, this was WAY too embarrassing and unreal to happen.
It wasn't the first time she had seen Spike's penis, having bathed together with him many times throughout her youth, but she felt he was more of a little brother to her than a colt friend.
Even though the firehose of a dick that Spike held in front of her was a sight to behold, the context in which it was used was too uncomfortable.

Spike on the other hand was both confused and excited by the sight of Twilight's pussy in front of him. He wasn't that interested in seeing Twilight's genitals, but he needed to watch his aim and couldn't look away. For a second he had an image of Rarity sitting there in place of Twilight, with her legs spread and urine flowing out of her folds. His dragonhood started to swollen and throb in his hands. He heard a silent, excited gasp coming from Starlight's direction, but he didn't pay much attention to it.

As Spike's stream was slowing down, he accidentally let out a crisp fart while flexing himself.

"Oops, sorry Starlight!" Spike blushed in embarrassment, knowing he was only a couple of feet away from Starlight. It didn't seem to matter to her.

"Nuh, that's okay, Spike!" Starlight reassured, "We're in the bathroom after all."

After saying that she farted under the water, creating bubbles to the surface.

This is getting too awkward! Twilight wished the whole ordeal to be over. She squeezed the last of her pee out, her marehood giving a couple of winks at Spike's direction. She waited for him to finish so she could wipe herself without getting her hoof wet. Luckily it didn't take too long for Spike to sigh as his stream slowed down to random dribbles.

"Okay, are you done now?" Twilight opened her eyes to see Spike shaking his cock dry in front of her, making her eyes go wide. He was considerate enough not to fling any of the droplets on Twilight.

"Appreciate you doing that, Spike!" Starlight smirked while Spike finished and turned around to leave.
"Wheh, that felt good!" Spike hissed in satisfaction before leaving, "Thanks, Twilight!"
"You're... Welcome, Spike!" Twilight shrugged and rolled her eyes. She was just glad it was finally over!

After Spike had left, Twilight glanced at Starlight to demand some answers.
"Did you cast a diuretic spell on us?" She asked with a frustrated tone.

"Mayyyybe..." Starlight replied and scrunched, "Well... I just learned that spell and tried it out on my own. I was supposed to tell you guys but .. I got distracted and forgot! I didn't know it could actually affect all of us!"

"You really should warn us before doing something like that, Starlight!" Twilight shook her head. She took out some toilet paper to wipe herself, "Lucky for you, I'm in a good mood today, so let's just forgot all about this!"

She finished and flushed the toilet before turning towards Starlight.
"Do you need to use the toilet, Starlight?" Twilight asked her, not sure why she was seemingly trying to avert her gaze for a second.
"Well, actually..." She replied and blushed, "I already did it... In the bathtub..."

"EEEEEEWWWWWWWWWW!!" She shrieked from the top of her lungs, "That's gross, Starlight!"

Twilight's little visit to Manehattan was indeed quite memorable, even though she really wished to forget it afterwards!

-The end-