1) The study examined how compulsive internet use (CIU) and relationship quality affect each other over time in newly married couples. 2) For husbands, higher CIU was associated with decreases over time in commitment, intimacy, satisfaction, smoothness of the relationship and closeness to their wife. 3) For wives, higher CIU in husbands was linked to decreases over time in how responsive they were to their husbands.