Why does lady macduff calls her husband a traitor?

The only family we see of Macbeth is Lady Macbeth. She was the one who convinced him into doing things that could cause betrayal. The only form of [somewhat] we see in Macbeth to LM is when after they kill Duncan he completely blocks her out from his thoughts and feelings, even as she goes mentally unstable. He no longer considers her as his 'dearest partner in greatest'. He has lost all his morals from listening to his partner to be able to do that.