5. Once you get her alone, tell her what you know about her situation. This may mortify her, but it's important that she knows you know. Tell her you care about her well-being, you are willing to help her if she wants it and what you can do. She needs to know she has support and protection because getting away from her abuser is very frightening. She may tell you she is fine and that she doesn't need help. She may even be angry at you. In that case, don't get angry or annoyed. Instead, tell her if she ever needs help, you are available. You can print the "family violence" article from my website and leave it with her.
6. Call the child abuse hotline. If your friend has children, you believe the children are in danger and she won't do anything, you may have to call the Child Abuse Hotline without her permission. This will not be easy because the family will then be investigated, the children may be taken away and both parents will be required to take parenting and domestic violence classes to regain custody of the children. Child protective services will give temporary custody to a safe family member in the meantime.
None of this is pleasant or easy. But, if you honestly believe the relationship is abusive or violent, it is the caring thing to do. Remember that domestic abuse or violent situations don't get better without intervention. 12 Dating Rules For Single Parents