Author's Note: In this story, it is possible for a pony to cast a spell allowing their spouse to become pregnant.
It all started when, Princess Twilight and Princess Luna, fell in love. The princesses, oddly, didn't mind the announcement of this, after all, love is meant to be shared. The two princesses had many awkward dates, as the attempted to not attract any attention to themselves. They did anything but keep from attracting attention. The duo soon found themselves married, with Twilight pregnant.
"2 more months! 2 more months!" Twilight announced as the paraded into the Canterlot Castle's throne room. "2 more months of what?" Celestia asked curiously. "2 more months of my pregnancy, silly." Twilight replied as she teased her sister in-law. Oh….right." Celestia replied as she began to blush. Luna overheard the news as well. "That's wonderful, dear. I can't wait to meet our foal." Luna replied. Twilight was about to send a letter to Cadence and Shining Armor about her due date, but she thought it would be best to notify her spouse in person first.
All four of the princesses spent the last couple weeks of Twilight's pregnancy in Ponyville to insure the mare was as comfortable as possible. Thought Twilight despised the idea of lounging around for two weeks, she took the opportunity to catch up on some of the new literature that had been delivered to the library. Between her wife, sisters in-law, and all her friends, everything Twilight could possibly need was covered. Pinkie delivered books to Twilight's room, Applejack made foal-friendly treats, Rarity had created a filly sized gown for the new princess's coronation, Fluttershy was her personal royal nursemaid, and Rainbow held everything together by gathering everything Twilight could possibly need to stay comfortable. This all came in handy when it was finally time.
"Fluttershy, Rarity, can you come here…NOW!" Twilight yelled. "I think my water just broke." As the two gasped, Rarity yelled, "GIRLS! We might need some help in here!" The other three mares rushed in, along with the princesses. "Are you ok, Twilight?" Cadence asked anxiously. "I will be as soon as I get this foal out of my body." Twilight replied in distress. Between the eight mares assisting, the delivery was effortless. Shining was permitted into Twilight's room minutes after delivery. Once Twilight and Luna had come to an agreement on their daughter's name, the two welcomed Shining in. "Hey Luna, how's Twily doing?" Shining asked nervously. "She's alright, in fact, she wants to see you." Shining and Luna entered Twilight's room to find Twilight holding her daughter as she rested. "Meet Princess Galatic Eclipse Sparkle." Twilight said proudly. "She's beautiful Twily. Definitely takes after Luna in appearance." Shining said pridefully. "She's definitely got your eyes." Cadence said in awe. Twilight blushed.
In Galaxia's early childhood, she found it hard to not have something she wanted. She got Birthday and Hearth's Warming Eve presents from her aunts and uncles, grandparents, and her mother's friends. Despite being pampered, Galaxia was always very modest. She never went around bragging about her belongings or her rank. She especially didn't brag about being Celestia's niece. Being distantly related to Celestia is a big deal, much less being her niece! The one thing the filly wanted the most was a sister, and she was about to get her wish.