One day, while Applejack and her family was visiting Pinkie Pie's family for Hearth Warming's Eve, Starlight brought up the question of what led up to to this to Twilight Sparkle; her friend and teacher. This lead to the Princess of Friendship revealing the whole thing about how the Alicorn had discovered Pinkie Pie's relationship to the apple clan. This leads Starlight to do some research on her own bloodline. After finding out that she was adopted, she begins by seeing if her DNA can lead her to her real family. It seems, that fate had a hand in helping her find her real family already, and a sister she never knew she had has been helping her in ways even Starlight would never dream of...
Addtional Information: This story is based off a concept found in "Twilight's Sacrifice" which is made by MetalandPonyFan2578 which you can read here: Twilight's Sacrifice - Fimfiction. This concept revolves around Twilight Sparkle being the sister of one Starlight Glimmer with the later having been given up for adoption. However, I did not like the fact that the story that brought forth this concept was done so darkly so I decided to make a much happier and much brighter story based on the concept. Proceed at your own risk. While this story is rated E and has no warnings associated with it, it does deal with the concept of adoption and other such scenarios. As such, the theme of adoption may turn away certain people. If you are one of those people, I advise you to turn back now. I will also not stand for Starlight Glimmer hate, so right now while Comments and ratings are enabled, I will turn them off if you can't behave yourselves. And before anyone asks, "New Beginnings" takes place during season 6 before "To Where and Back again" but after "No Second Prances". "Biological Connection" takes place shortly after "New Beginnings" while "The Things that Changed" takes place after the 8 year time skip in an alternate universe where season 8 and season 9 never happened yet the MLP Movie did. Scootaloo being Rainbow Dash's biological sister for "Biological Connection" was an idea taken from the story series known as Dear CMC and you can read Scootaloo's part of the series here: Dear Scootaloo - Fimfiction. Meanwhile, "The Things that Changed" involves Spike and Sweetie Belle being married which is a ship you probably have seen everywhere here on Fimfiction. The wedding itself was inspired by A Belle-lessed Union and I tweaked it for the purposes of this fan-fiction. You can read A Belle-lessed Union here: A Belle-lessed Union - Fimfiction. Finally, if it seems like Spoiled Rich is out of character during "The Things that changed", well how about you go read my story Changing a Spoiled Mind which contains context for this mysterious out of character stuff here: Changing a Spoiled Mind - Fimfiction.