Moonsongs

Moona was soaring high in the sky. It wasn't just her body that was high, she also had high hopes of finding princess Luna. Although she hadn't agreed to it at first, she was secretly excited to meet the mare that could possibly be her mother.
Eventually, after flying over the majestic city of Canterlot for what seemed like an eternity, they reached the royal palace.
"Hey! We're here! I can't wait to get my hooves off of this dusty hill and onto the shiny palace floor!"
"How the heck does that pony still have energy in her?" contemplated Moona.
Putting on her best 'royal' walk, Pinkie strutted past the guards, only to be stopped by the strength of their white wings blocking the entrance.
"WHO GOES THERE?"
"Pinkie Pie and Moonso- Err, I mean, my friend. We're here to see-"
"PRINCESS CELESTIA?" "Wow," Moona thought, "Even the guards talk in the royal canterlot voice."
"Um, no, actually, we're here to see Princess Luna!" Squealed Pinkie with excitement.
Their white wings snapped shut against their tall, figures, their expressions remaining blank the whole time.
"Wow..." Moonas eyes grew wide as she admired the magnificent palace before her eyes.
"You've never been here? Oh boy, they have the most AMAZING doughnut shop. Spike took us there once. It was de-licious!" Once again, Pinkie had got lost in her own thoughts.
"Remember why we're here, Pinkie."
"Oh! Right! To find the princess."
After 4 spiral staircases and 6 endless coridors, they finally reached Princess Lunas chambers.
Moonsong gulped down her fear and approached the solid wooden door. At first, she was unsure whether to knock or not. Her mind was telling her not to, but her heart was telling her otherwise. After brief thoughts, she knocked on the door and called for Princess Luna.
No answer.
As they started to trudge back through the corridor, a heavy sigh escaped their mouths. But then a glimmer of hope appeared. They heard the creak of a door, a wooden door, opening near Lunas room.
"Princess Luna!" Pinkie exclaimed.
"Ah, come in my little ponies," said the soft voice of Princess Luna, who had been practising her 'normal' voice.
"Please sit. Who do I have the pleasure of speaking to today?" asked Luna, her canterlot voice slightly coming forward in her excitement.
"Oh, sorry. It's just that not many people come to visit me.."
The two ponies stood silently in the corner of the room. Moona was the first to speak.
"Hello, Princess Luna. I need to speak to you about your... family."
The princesses pupils dialated. All her memories came back through her, enveloping her in a drowning pool of sorrow.
No! Please Electric, what will I do with Moonsong?
Take good care of her, my dear...
Suddenly she snapped away from her flashback.
"Are you referring to my sister?" She knew full well they were talking about her child.
"No, Princess. We're talking about your... child."
"I DEMAND TO KNOW WHO TOLD YOU OF THIS!" bellowed Luna in her Canterlot speech. Her eyes glowed white with anger and sorrow.
"Princess, I... I think I'm your daughter."
The princess immediately inspected the young pony who had entered her room.
"The same coat colour, similar cutie mark, same eye colour as Electric, same mane colour as Electric... but the name," thought Luna to herself, "whats her name?"
"Your name would be..?"
"...Moonsong."
"Moonsong....?"
"Moonsong Shimmer."
"By Celestia, this can't be!" announced Luna, slightly confused and slightly happy.
"I lived with my Granny for 10 years, and 8 years ago, she passed on. I recieved a letter from her..." Moonsong slipped the letter out from her saddle bag and handed it to the emotionally wrecked princess in front of her.
After reading every word over 3 times to be sure, the princess finally spoke.
"There is only one way to be sure if you are my daughter. I'm certain that when you was a newborn filly, you was diagnosed with a condition that gave you extremely strong wings, capable of flying at gravity defying speeds, faster than anypony around. You will be a competitor in a race with the 3 fastest ponies in town: Rainbow Dash, Soarin', and Spitfire."
Spitfire and soarin'... Spitfire and soarin'...
"It will take place tomorow in the cloudisseum. Be ready, young pegasus."