Observe the family over a period of time and have an intervention plan if physical safety is at risk. Sometimes, the simple notion that others are watching slows down and halts abuse. Families need to be held close to the church body when in trouble. Communicate that Christians do not abuse. Men's groups such as Promise Keepers and women's retreats provide forums for all sorts of family coping skills.
Stressed families are at risk.
Abusers will often accept help in anger management. They've developed poor relationship skills, and would like to break the pattern. Develop a list of counseling resources. Attempt to minister to all involved. Destructive patterns require whole-family counseling.