Emma and Sid have been married for three years. Six months ago, they had a major argument that almost resulted in a separation. Afraid to engage in that kind of disagreement again, they avoid difficult conversations. They feel reluctant to share their true feelings about important issues, which has led to misunderstandings. However, they both care about each other very much and want the marriage to work.Which characteristic of a healthy relationship is most missing from Emma and Sid’s marriage?