The literature on extrinsic emotion regulation or the intention to modify other people's emotions has grown in recent years, accompanied by proposals in which its definition is made more precise, the way to understand it in relation to other related processes is delimited, and the consequences of its use in the quality of close relationships are evidenced. Conceptual reviews on this topic recognize the importance of examining the affect and dyadic dynamics that arise between those who regulate each other extrinsically. This dynamic refers to emotional interdependence, the potential of the members of a dyad to shape each other's emotions reciprocally, particularly in those who share a close bond, such as that of a romantic couple. There is little theoretical development regarding the relevance of this characteristic in relation to EER. This article has two objectives: (1) to make a narrative synthesis of the characteristics that define EER and (2) to expand and complexify the existing model by including the emotional interdependence as a vital component in the understanding of the functioning of EER. Lastly, the role of emotional interdependence in the emergence, maintenance, and satisfaction concerning couple relationships is made explicit through phenomena such as shared reality.