WARNING: Explicit Content. Newly engaged, Emma Swan and Regina Mills have finally moved in together... err, Emma finally moved into Regina's mansion, that is. After comfortably settling in to a new way of life, things seemed to be going pretty smoothly for the couple... until it wasn't. Enter Rita Castillo; a tall, wealthy, and strikingly beautiful woman who dresses a bit.. eccentric. The one thing about Rita that Emma can't help but notice, is that she's the mirror-image of her betrothed. Regina never mentioned a sister though.. and what's more, why is she here? It's not long before Emma begins to wonder if there are things about Regina's life that she's purposefully left out, and If so, then why? As Regina works tirelessly to solve the crime of a local serial killer on the loose, Emma slowly becomes more and more distant from her fiancée, and gets drawn in by the mystery of Rita. Will Regina's secrets drive Emma into the mysterious Rita's arms?? Or will she come to the understanding that there are still a few things about her fiancé that are better left uncovered...