The Unicorn and the Pegasus

Once upon a time there lived a poor family in ponyville. They were poor but still lived happily because they had their two twin fillies which they loved. They were twins that were born with rare eye colours. One a unicorn mare named Rosetta and the other a pegasus colt named Thunderscore. These twins were always spending time with each other and they lived happily together. Then One day when Equestria was under attack, their small house was destroyed and their mother and father had to flee somewhere else. To solve this problem, the mother and father took the twins to Canterlot to explain to Princess Celestia and Princess Luna about their situation. Worried that the family would not be able to afford to take care of both of the children with the bits they currently have, they came to a conclusion that they would separate the two twins. Their mother the unicorn would take Rosie and stay with the Princesses in the castle to Study Magic as Celestia's student, and thunderscore would stay in Cloudsdale with his father the pegasus in a newly built home. They also cast a spell onto both of the twins so that neither of them would remember that they even had a twin. Although they have all that they could ever need, they still can't help but feel like they are missing something from their lives.