My opinion of Lady Macbeth is that she is controlling and insane. When Macbeth is having second thoughts about killing Duncan Lady Macbeth made him feel bad for "breaking his promise". She told him that if she promised to kill her baby even while she was nurturing she was take it off her breast and kill it. If that doesn't prove she is psychotic I don't know what will. I do believe that Macbeth is at fault for the murders but I think that without lady Macbeth they probably wouldn't have happened.