“Trust is imperative for a successful relationship,” says Hall. If you suspect he’s being untruthful, telling him straight out that you don’t believe him will usually backfire. Instead, say, “I’m having trouble believing you’re telling me the entire story.” It’s less inflammatory and accusatory. Focus on asking questions about a particular incident to fully open the lines of communication. “The idea is to listen rather than fire off harsh statements,” says Stacey Laura Lloyd, the Dating Expert for about.com. “By gathering all the facts first, you’ll be in a much better position to understand your spouse’s behaviour and then react appropriately.”
14 things you should never say to your spouse
Don't let these toxic phrases harm your relationship to the point of irreparable damage.
Don’t call him or her a liar