Sounds like Perfection by Kiba (NC-17 on Spark, MA here)
www.dokuga.com/spark/story/3474/1
*Complete*Kagome has been kept a secret for her whole life; she knows why too. She only has a few friends from the village near her mother's home and she's not suppose to have them. That's not the reason though the reason is because Kagome is perfect to everyone but herself. Her scent, her looks, and her well everything is to prefect for her mother's taste. So her mother Yukena (U- keen-a) hides her away wanting only her daughter Kikyo to be known. Kagome go out one night and cries to the stars ...