Kind of a sad unfortunate story Nikki , I think your mother was going through difficult times and that's why she eventually connected to the JWS.
Its not surprising when ex-JWs state what they think is the most harmful doctrinal policy established by this religious organization is the shunning DFing .
This has indirectly caused millions of families to break apart , marriages to dissolve and a few suicides as well.
Here's the stupid part of this social behavior which is ironically redundant and may create more problems latter on..
If a person is behaving in a harmful immoral way and its brought to attention to the elders of the congregation and they disfellowship that person, the DFing effectively stops all communication and contact from concerned ones , such as family and close friends.
ie ..you cant help someone if you cant talk and communicate to that person.