Coercive control refers to a pattern of controlling behaviors that create an unequal power dynamic in a relationship. These behaviors give the perpetrator power over their partner, making it difficult for them to leave.

Sometimes, coercive control can escalate into physical abuse. However, even when it does not escalate, coercive control is a form of emotional abuse that can cause psychological trauma.

~ Definition culled from https://www.medicalnewstoday.com/articles/coercive-control

After watching this season's #RHOBH, it is clear to me that Erika Jayne Girardi was being coercively controlled by her husband Tom. It explains why she was unable to leave when he was treating her badly.