During the same show, Iyanla explained to Ed, the self-proclaimed cheater, that when he's sleeping with more than one woman and not being honest with them, he's actually harming himself.

"Your ego and your intellect can tell you that [you] can rationalize it if you want to, but you're not cheating on the woman," Iyanla said. "You are cheating on yourself."

More from the show 
Meet Iyanla   
Iyanla returns to The Oprah Show after 11 years
How Iyanla lost it all
Read an excerpt from Peace from Broken Pieces