Watch this video in which Esther Perel, world-renowned expert on infidelity, describes steps to help couples heal from the trauma of an affair and provides hope where there may be none.

Regarding infidelity, much is written for the person who was cheated on. Tammy Nelson, Ph.D. shares a different perspective on infidelity: when you're the one who cheats.

For many couples healing from infidelity, Valentine’s Day brings a mix of pain and passion. Therapists help partners sort through these complicated emotions.