The Nephalem Daughter of Michael

Twin sisters Kelly and Kaida Kline are both innocent women's that get caught up in the deadly world of Supernatural as they both made a terrible mistake of sleeping with the devil, Lucifer himself and his brother, Archangel Michael

They both have children. Jack Kline, the son of Lucifer and the first Nephilim. His cousin, Alexandrya Kline, the daughter of Michael and the first Nephalem ( half-angel, half-Demon) in existence. Two kids born to two of the most powerful Archangels - Michael and Lucifer

How will the cousins navigate their way into a world that want them both dead. What happen if a certain Winchester fall for the daughter of Michael