Lady MacBeth's Death

When Macbeth hears about Lady MacBeth's death he acts as though nothing has happened. I think Shakespeare created this unemotional reaction in order to show that MacBeth was too worried about his own well being to be concerned. Although MacBeth loved his wife I think that he may have been somewhat relieved from her aggressive attitude. I'm not saying that he was glad to be free of hearing how he should "grow a pair" I just think that at the time she was not the top priority on his agenda.