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."
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Iyanla returns to The Oprah Show after 11 years
How Iyanla lost it all
Read an excerpt from Peace from Broken Pieces