This article proposes that WhatsApp can offer insights into couples' relationships. Based on Gottman's therapy model, which mathematically analyzes marital conflicts, this study focuses on couples' WhatsApp correspondence and asks to what extent it reflects the offline relationships of Generation X. The research was conducted over a year using semi-structured interviews with 18 couples who have been in a relationship for at least 5 years. The couples described their discourse on WhatsApp and the dynamics of their relationship offline. The findings indicate that WhatsApp use mirrors offline relationships. The following four types of interaction were identified: (1) technical, (2) practical, (3) casual, and (4) emotional. In addition, the following three patterns of conflictual behavior that correspond with Gottman's distinctions were identified: (1) logical, (2) emotional, and (3) avoidant. The article cites WhatsApp's potential for behavioral observation and the possibility of using it to change relationship dynamics.