To rebuke does not mean to point out every sin we see; it means to bring sin to a person’s attention with the purpose of restoring him or her to God and to fellow humans. When you feel you must rebuke another Christian for a sin, check your attitudes before you speak. Do you love the person? Are you willing to forgive? Unless rebuke is tied to forgiveness, it will not help the sinning person.
So watch yourselves!

“If another believer sins, rebuke that person; then if there is repentance, forgive. Even if that person wrongs you seven times a day and each time turns again and asks forgiveness, you must forgive.” (Luke 17:3, 4 NLT)