Melissa and Dennis have been in a relationship for eight years. Both admit to getting physical with the other and having been unfaithful, but Melissa says she wants to marry Dennis and will do whatever it takes to save their relationship.

TELL DR. PHIL YOUR STORY: Fed up with your spouse?

Dennis’ daughter Amanda says her father’s relationship with Melissa needs to end. She says they fight constantly, often in front of the grandkids, and that her father is a serial cheater and narcissist.

WATCH: Why Woman Says Her Father’s Relationship With His Girlfriend ‘Has To Stop’

In the video above from Tuesday’s episode of Dr. Phil, Dr. Phil reviews some of the ways Melissa and Dennis reportedly interact with each other that makes their relationship volatile, including oversharing on social media.

On Tuesday, hear from Dennis and what he says about his reported behavior. And on Wednesday, another woman wants to confront Dennis. Check here to see where you can watch.

TELL DR. PHIL YOUR STORY: Betrayed by a loved one?

Man Admits He Is A ‘Mental And Emotional Abuser’