This involves two of my siblings. The one being abused(78 years old) does not know what to do and will not cut off the younger one(60 years old) because she believes the younger one will commit suicide, run off, etc. The younger one may very likely be abusing drugs or is severely mentally ill.
Kentucky Dept of Community based service
This is financial abuse
Work with KY dept to stop this and also get help filor your dad
Sounds like you need a family chat NOW and clear this up. And if that doesn't help...walk away. (Run off?? I'm 60 and the furthest I can "run" would be the local Marriott. That's a ploy if ever I heard one.)