What are the tasks for couple therapy in the wake of infidelity? How can we help clients to recover from betrayal trauma and move forward together? And what do ‘new monogamy contracts’ have to do with it? Ahead of PESI UK’s Women’s Trauma Summit this week, leading sex therapist and author Tammy Nelson outlines the crisis, integration and vision stages of this work in the light of a cultural shift from morality to transparency.