"be unfaithful to" in German to be unfaithful to betrügen Detailed translations for "be unfaithful to" to be unfaithful to to be unfaithful to(also: to deceive) betrügen{transitive verb} Maybe because you're the mother of my child... and I know you would never be unfaithful to me. Source: opensubtitles.org Corpus by OPUS Request review Die Mutter meines Kindes. Und weil ich weiß, dass du mich niemals betrügen würdest.