The Internet can enhance existing relationships or facilitate the development of new relationships, including illicit ones. Increased research in this area has predominately been on online sexual addiction and pornography, with few about social networking sites. Facebook, a popular social networking site boasting 1.15 billion active users. This article reviews existing literature on Internet infidelity, comparing online activities and Facebook-specific behaviors. Five areas related to Internet infidelity will be explored, such as definitions and the impact on relationships. Although several similarities exist between general Internet and Facebook-specific infidelity, unique differences exist. Implications for future research and clinical practice are presented.