Lil' Dashie.

"Mom?" the filly asked her mother. "Why I still have no cutie mark? Is that because I'm lame?" Her mother giggled which sadden the little blue pegasus. "I-I knew I was....

"Oh no, you're not!" she cut her. "You are going to be the best flier of all Equestria or my name is not-"

"B-but they keep laughing of me!"

"Who? Those boys you told me about?" She nodded. "Don't listen! Do what that little voice in your head is telling you!" Dash's bellied growled. "Or in your case you stomach." Dash blushed which made her mother giggled more. "I'll go get you something to eat" she said before heading to the kitchen.

"Mom! Wait!" Dash shouted, making her mother stop mid way.

"What is it sweetheart?"

"Are you sure I can fly super super fast like..."

"Your cousin?" Dash nodded. Her mother laughed again, which upset the filly. "Of course no." Dash was stunned.

"W-what? I'm that bad?" she replied with a sad tone.

"No!" she cut her. "You are that better!" she continued with a smile. But once she saw her little one looked confused, she kept on. "I expect you to fly even faster that him. Much much faster!"

"Really?" Her mother nodded. "H-how much faster?" Her mother was about replied when a bell resonated from the kitchen.

"Oh! Seems my cookies are ready!"

"C-cookies?"

"Yes. I knew that my little Dashie would be hungry after her flying classes, so made some." she told her before going into the kitchen.

"Sweet!" she said, excited. But her mom came back with empty hooves.

"They need to cool down a bit a while they'll cool, let me tell you about a story. A old story that we pass from mother to daughter." she said before gesturing her to sit on the couch. Dash quickly flew and landed on the cloud-made cushions while her mother stood in front of her. "Did you ever heard about the Sonic Rainboom?" she questioned her.

Dash shook her head."Nope. What is it?"

"It is said that the fastest of all the pegasi could one day be able to make one..."

"But what is it exactly?" she cut her mother, impatiently.

"Is it said... that it looked like a sonicboom... with colored like a rainbow."

"Y-you mean like my mane?" She nodded. "Sweet! And who actually did one? I bet if was one of the Wonderbolts."

Her mother looked at her in the eye. "Nopony!" Dash gasped.

"N-not even..."

"Not a single one Wonderbolt." Dash was shocked. "But you could be this pony, Rainbow Dash."

Confused, Dash looked to her sides. "M-me?" Her mother smiled and nodded.

"Yep! I'm confident that you will succeed and make us proud." She said before heading to the kitchen. "They should have cooled enough. I'll be back." Dash was flabbergasted. She remained quiet but confused, happy but nervous. Confident but scared, fearing to disappoint her mother and doubting her own self. Her mother came back with a plate full of warm chocolate cookies. "Here. Eat them while they're warm." she said calmly.

"M-mom?" Dash asked her mother. "W-what is I... what if I don't?" she said with doubtful tone. Her mother smiled.

"Then... You will still fly faster that you cousin, Dashie. Isn't that awesome enough for you?" she replied smiling.

"Uh..." she replied. She shook her head of any doubt. "No!"

"No?"

"I'm going to beat him, those boys at school and every pony that will try to beat me at a race!"

"What if you lose?"

"I won't lose! I hate losing anyway."

"So, you are going to make that sonic rainboom?"

"I... Yes! I will! For you and..."

"For yourself." she cut her out, grinning. Dash smiled back and nodded. "Good." She pulled the plate of cookies from Dash face and walked to the kitchen with it. "Then, go clean your room and you'll be allowed to eat one before dinner."

Dash deflated. "Awww... Mom!"

Her mother stood in the kitchen door frame. "I'm counting on you."

Confused she asked her. "For cleaning my room?"

Her mother replied with her best smile. "And doing the sonic rainboom."

Dash stood up, put in a pose, spread her wings and replied with a grin. "I will."

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Lovely work