If adult daughters are isolating or controlling an adult brother to drain their mother's assets, it is elder or financial abuse.Identify the signs: This often involves transferring estate assets, changing the mother's Power of Attorney, or manipulating the mother into paying for the son's lifestyle.Report the abuse: Contact local authorities or report the exploitation to the Oregon Department of Human Services.Protect the finances: The mother (or her legal guardian) should immediately freeze joint accounts or revoke any access the manipulative siblings have to her finances.