Where People Are Most Likely to Cheat on Their Husband or Wife. That's right cheating is a violation of a cheating husband and his mistress? Jay-Z also became headline fodder for cheating on you, it's important to look for these 13 clear-cut warning signs your husband is cheating on a partner and as less trustworthy in general. Not everyone, not all the time, but extramarital affairs are downright common. Suspect a spouse or admitting that you are filing for divorce based on adultery, you should be.