How much trust would you have for someone who cheated?

If that person cheated on their love for you how much trust would have for that person. Me personally I would treated it like how a kingdom treats their soldiers that defected from another country whereas they would be untrustworthy, kinda dishonorable, dishonest, and someone to keep an eye on. As a guy I wouldn't care much if all I want is but I don't rely on in a relationship.