Were There Clues Their Relationship Might Be Toxic (Even On Their Honeymoon)? (VIDEO)

Caroline and Sonny say their nearly three-year marriage has been tumultuous, with plenty of fighting and both sides alleging verbal and physical abuse. Caroline claims the police have been called to their home more than 20 times since they've been together.

Watch the video above as Dr. Phil reviews Caroline's version of the timeline of their courtship, engagement, honeymoon and pregnancy, pointing out possible clues along the way that this relationship might be toxic. Dr. Phil makes it clear that the timeline is only Caroline's perception of what happened and that Sonny disputes some of the events and how they're portrayed.

Dr. Phil sums it up: "The best predictor of future behavior is past behavior. If you want to know what someone is going to do tomorrow, look at what they did yesterday."

On Wednesday's episode of Dr. Phil, Caroline and Sonny say the situation got even worse when Sonny cheated on Caroline with her sister, Ashley, after a night of drinking. Watch more from this show here.