You shouldn't tell your parent what to do.
Joe's mother has trouble with gambling irresponsibly, and he catches her before she goes to the casino again.
Joe wants to discourage his mom from gambling.
Joe suggests to his mother that the money would be better spent elsewhere.
Joe tells his mother directly not to go to the casino anymore.
Joe's mother starts to ruminate over what he said and agrees with him.
Joe's mother thinks he is trying to control her and refuses to listen.