Shockingly, infidelity affects 1 out of every 3 marriages. Could it happen to you? Dr. Oz has the quiz to assess the safety of your marriage. Learn the warning signs of cheating to look for in your spouse.

Click here to watch Part 1 of Is Your Spouse Cheating?

Click here to take a quiz to learn how likely your spouse is to cheat.

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!