When a difficult situation arrises, there is no one more trusted than the Mane Six; and there is no pony Princess Celestia trusts with this situation than Apple Jack. Upon discovering a siren egg stolen by Starswirl from the Dazzlings hundreds of years before, she asks AJ, the pony who knows family best, to raise the siren in a loving environments in the hopes it will grow up to be a friend and asset rather than an enemy. But as she hatches and raises the baby siren, her family begins to crumble and she wonders if she's the best to raise the young siren after all.

Takes place in the Nurtureverse, an AU based around this fic. Below are a list of stories that take place in the same universe. They are not necessary to read to understand this one.
Call of the Siren
In Which Rarity Ships