Sisters Jessica and Amber claim their nightmare began 27 years ago when their mother, Meloni, married Steve.

They claim their ex-stepfather sexually abused them when they were young girls until Child Protective Service got involved. Ten years ago, Steve was convicted of sexual abuse and had to register as a sex offender. But Steve maintains his innocence and says Jessica and Amber were brainwashed by their mother into lying. They confront each other for the first time in 10 years, and Steve takes a polygraph test.

And, don't miss Part 2 on Wednesday when the polygraph results are revealed.

TELL DR. PHIL YOUR STORY: Ready to confront someone?