I read a mother scared to death that something happened to her child when he disappeared, and scolding him for running off without telling her. I see no sin in that at all. Jesus was her boy, as young and defenseless and dependent as any other boy. It was her job as a mother to look after him and take care of him, like any other mother. And like any other mother, if her boy runs off somewhere for days, she was likely to be panicked, and likely to tell him to never, ever do that to her again.
Where is there anything approaching sin in that?
Does a mother sin when she tells her child not to run away?
Vicomte13: Does a mother sin when she tells her child not to run away?
No, this would not normally be a sin for a mother. But in your example, the child would definitely be considered sinful for running off and not telling his parents. Since we know that Christ could not have sinned, it eliminates Him as the cause of conflict. Therefore, Mary must have been the cause of conflict.
I also think it interesting that Mary was the one who was doing the supposed discipline. Where was Joseph during this time? Wasn't the father responsible for his children in those days? Was Mary usurping the role of Joseph (i.e. sinning)?