Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.
Has anyone called Child Protective Services? It is verbal for now, but if/when Mommy Dearest hits your sister, that would be the first move. With your case history as an established pattern of behavior, you may be able to help Sis.
Call CPS
and document in an on-line journal.