@ SR
Effects of toxic mothers-in-law may include:
Family stress: The tension that comes with this type of conflicted relationship can cause family stress and possibly toxic stress.
Marital tension: The extreme manipulation and triangulation of a toxic mother-in-law can have a serious impact on the marital unit.
Anxiety: As discussed earlier, emotional abuse and self-doubt can contribute to symptoms of anxiety.
Depression: Being emotionally abused and manipulated may lead to increased depression.
Addiction: In an attempt to cope with a toxic mother-in-law, one may begin over-eating, over-drinking, or engage in other addictive behaviors.
Rigidity or attempts to dominate other relationships: Behaving in this way may offer an alternate method of managing the feelings of being out of control in a relationship with a toxic mother-in-law.
Source: Yiddish Shviggers 2014