Everyone has their own concept of what “monogamy” means—and most people assume their partners and spouses are on the same page. Couples may assume that they are monogamous, but never discuss exactly what the monogamy agreement means to them. What happens when this implicit agreement is broken? After infidelity, relationships can become strained as both partners lose trust and faith in each other. The New Monogamy offers a way out of these difficulties for couples struggling to stay together after infidelity. Couples make these implicit assumptions and agreements explicit so that each partner knows exactly what is expected of them in the future and what they can expect from their partner.