Twilight pushed open the double doors with her magic, revealing a large room fit for a princess. Rainbow came to a stop beside her and looked over the room. The walls were marble, inlaid with golden swirls, looking like she pictured Princess Celestia's room. A large mahogany bookshelf dominated the entire left wall, filled with thick volumes of books. Directly across from the entrance was another closed door, leading to a balcony overlooking Canterlot and most of Equestria's heartland.
On the left side of the room, against the wall, there was a large, alicorn-sized bed. The bed was large enough that Princess Celestia, Twilight, and Luna could all have fit on it with plenty of room to spare. The bedsheets were a deep red color, and they caught the moonlight just right, making them shine ever so slightly in the soft lighting coming in through the window. The bed had a frame around it with thin, light-blue curtains, which were all pulled back. A simple nightstand was to the left side of the bed. It didn't have an alarm or a lamp. On the far side of the bed, there was a dresser made of the same mahogany as the bookshelf.
Twilight smiled in delight. Her wings fluttered in anticipation at her sides. She cast a glance back at the door, then took a couple steps inside. Rainbow looked over at her and grinned. The alicorn looked beautiful in the dress she wore, the same one which she wore earlier that day. The loose-fitting blue dress accented her perfectly in Rainbow's eyes, flowing gracefully down her body and lightly hugging her form, hiding her tail, and enhancing her beauty. Twilight's tail swayed a little behind her, hidden by the light-blue fabric.
Rainbow swallowed and took another step inside. Twilight immediately turned to face her and looked down at her. Rainbow looked up at Twilight as the tall alicorn looked at her intently, her gaze trailing along her muzzle and face, down her sides to her wings. After a moment, Twilight's eyes darted up. With barely any delay, the doors snapped shut and the lock clicked. Twilight took a step towards Rainbow, then leaned down. Rainbow leaned forward and met Twilight's lips with her own. She shivered in delight and let out a soft moan as Twilight's tongue teasingly slid over her lips. She parted her mouth slightly, only for Twilight to pull back. She frowned and pinned her ears back, pouting.
Twilight smirked. "Mmm... not yet..." she cooed. She swiftly leaned back down and nudged Rainbow's muzzle aside, then pressed her lips against Rainbow's delicate neck. The pegasus shuddered at the touch, and Twilight simply kissed her. She could feel Rainbow's heart beating fast and hard through the pulsing in her neck. She slid her head down a little, pressing her nose against Rainbow, then inhaled deeply of her scent. A moment later, she gave Rainbow a quick lick up her neck. Rainbow held her head limply aside but watched her closely. Twilight smiled at Rainbow, only for the moment to be broken by a sharp crack of magic.
Twilight slowly closed her eyes and reluctantly pulled her head back up, her chest expanding in size as she filled her lungs. Her smile disappeared completely.
"Ah, there you are Twilight," Luna greeted in a calm voice. "Rainbow," she acknowledged.
Twilight's tail flicked behind her in annoyance. She turned around and looked at the smaller alicorn who stood near the end of the bed. Luna's expression was soft and calm, and completely oblivious. "Luna..." she greeted, barely restraining the annoyance in her voice, though it still managed to seep out.
Luna's lips twitched down into a frown, but then returned to normalcy. "I was hoping to have a word with you two before you retired for the night," Luna replied leisurely. "Celestia wanted me to discuss matters of Rainbow's coronation as soon as possible, and given that the day's festivities have drawn to a close, I assumed you two would be available," she stated, somehow managing to keep her voice entirely even and normal.
Twilight's left eye twitched. "On our wedding night?" she asked in an accusatory voice.
Luna nodded calmly and her frown returned. "Of course," she answered. "Since you two are married, Rainbow is now an Equestrian Princess. We need to discuss matters of her formal coronation. The event will likely take place within a month's time, and then it will be official."
"Luna... on our wedding night?" Twilight asked again in disbelief.
Luna hesitated but nodded calmly yet again. "Of course... With as festive as the day has been for you two, I understand that you would like rest, but these are important matters," she affirmed.
The section of Twilight's dress covering her tail lifted up, then flicked almost like a whip in agitation. "Luna, have you ever heard of a honeymoon?" she asked, her voice filled with agitation.
Luna tilted her head to the side for a moment. "I do not believe I have," she stated. "What is that?" she asked curiously.
"What you're interrupting," Twilight deadpanned.
Luna blinked. "I do not understand? You two are retiring for the day, are you not?" she asked.
Twilight huffed. "We just got married, what do you think?"
Luna's brow creased. "I... would assume that you're retiring. It is nighttime, and it has been a long day for both of you given the celebration and festivities..." she said at length.
"What else do ponies do at night, other than sleeping?" Twilight demanded.
Luna studied Twilight for a moment, then her gaze drifted over to Rainbow. Her eyes glanced over the pegasus, taking in her darkened form before settling on her slick, damp neck where Twilight had licked her. Rainbow's tail twitched in agitation behind her. Luna shifted her weight, then her expression blanked. Twilight's tail flicked again. A small, red blush grew upon her cheeks.
Twilight glared at Luna.
"I-I... will take my leave, now," Luna affirmed, nodding to herself quickly. She stepped back and lit her horn. "I shall return in the morning and-"
"Luna. Think about it. Does that actually sound like a good idea?" Twilight queried, still glaring at the smaller alicorn.
Luna shifted her weight on her hooves and fluffed her wings. "I... believe that this matter can wait... at least for a couple of days," she said hastily.
Twilight's glare faded and her lips pulled up into a happy smile. "Good," she stated. The smile faded into a cold, icy gaze. "Now leave before I tell Cadance about this."
Luna's cheeks paled, the blush immediately fading. Even her mane seemed to turn white and icy in response to Twilight's threat. "O-of course, Twilight... Rainbow," she said with a nod of her head. "Please enjoy the rest of your evening," she added hastily before teleporting away.
Twilight closed her eyes, then groaned.
Rainbow stepped closer to Twilight, then rubbed up against her.
Twilight smiled instinctively at the touch, then opened her eyes and looked at Rainbow. In a flurry of her magenta magic, Rainbow was laid down on her back on the bed and Twilight sauntered over to her. A magenta glow enveloped the walls, sealing the room off from the rest of the castle. "These dresses are nice... but they're not that comfortable..." she trailed off. "And your coat is so much nicer..."
Rainbow grinned.