Introduction
As the smallest social institution, the family is effective in improving the mental health of the society. Husband and wife are the main cores in the formation, advancement and improvement of family goals, and the way they interact is effective in achieving these goals. Women are half of the society's population and as one of the important members of the family system and society. A woman as a wife provides a warm and loving environment for the health and growth of other family members. Therefore, it is necessary to have mental health to play such a role.Therefore, the present study was conducted in order to investigate the prediction model of emotional blackmail based on the difficulty of emotion regulation and cognitive fusion with the mediation of authenticity in relationship in married women. This research is one of the structural equation modeling correlation researches.

Method
This research is one of the structural equation modeling correlation researches. The statistical population of the research is the married women of Najaf Abad city in 1402. A sample of 220 people was selected using the accessible method and the questionnaires of emotional blackmail (Rahmat, sodagar, gamhari, 2018), difficulty in regulating emotions (Gratz and Roemer, 2004), cognitive fusion (Gillanders et al, 2014) and Authenticity in the relationship (Lopez and Rice, 2006) were completed. The obtained data were analyzed with SPSS26 and AMOS24 software using the structural equation model with the maximum likelihood method.

Results
The results showed that there is a positive and significant relationship between the difficulty of emotion regulation and cognitive fusion with emotional blackmail (P<0.05). There is a negative and significant relationship between the difficulty of emotion regulation and cognitive fusion with authenticity in the relationship (P<0.05). Authenticity mediates the relationship between emotion regulation difficulty and cognitive fusion with emotional blackmail (P<0.05).

Discussion
Based on the study, it seems that in order to overcome the trap of emotional blackmail, it is necessary to pay attention to the authenticity in the relationship as a mediator of the relationship between emotional blackmail with the difficulty of emotion regulation and cognitive fusion.