Keith says he was devastated when he found out his wife of 18 years, Sarah, was talking to and dating African men online. Then, he says, she dropped a bombshell: She is planning on divorcing him, leaving their kids and going to Kenya to meet her 26-year-old boyfriend and marry him.

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

On Friday’s episode of Dr. Phil, Keith meets his wife’s online love, Kevin, who claims to be a pastor to the children at his orphanage, for the first time.

“I don’t know what Bible you guys are reading, but the one I read says that it’s one man, one woman. You don’t covet your neighbor’s wife,” Keith tells Kevin. “I hope you don’t think that I will give up willingly. This woman was a gift from God to me, and I will fight until the very end to save her. A man doesn’t steal another man’s wife.”

WATCH: Family Claims Loved One Is Being Scammed By Kenyan Boyfriend Whom She Plans To Marry

How does Kevin respond to Keith? And, what is the strong warning Dr. Phil gives him? Plus, hear Sarah’s message for the man she says she’s madly in love with.

This episode of Dr. Phil airs Friday. Watch more here.

TELL DR. PHIL YOUR STORY: Conflict so big it needs a Dr. Phil solution?

Family Begs Loved One Not To Go To Africa To Meet Boyfriend