We heard a story much like this today, a youngest son taking advantage of an elderly mother, stating he was going to have her house when she is gone even though there are 4 other siblings. The father just died a while back so this is happening even during a difficult time. Drug addict, causes trouble wherever he goes with others. The mother takes his side every time there is an issue. That would just tick me off to no end. I hope your brother does the right thing and pays her back asap so it doesn't cause more tension.