Forty-five-year-old Kevin Esterly made headlines when an AMBER Alert was issued for 16-year-old Amy Yu. According to police, the father of four had a "secretive" relationship with Yu, his teenage daughter's best friend, before the pair ran away to Mexico. Yu was found safe, and Esterly was arrested for interfering with custody of a minor. In an exclusive interview, Esterly's wife, Stacey, speaks out about the lies, betrayal, and what she knew about her husband's relationship with a girl they considered to be a fifth daughter.