She walked out on him years ago, or rather he walked out on her when he was sent to the Big House, so he did. On the few occasions where he has been written back into the storyline the plots have been so bizarre as to cause suspension of belief. If I remember correctly the last time he appeared he had been released from the Big House, only to kidnap someone and go straight back. As a devotee of the show since 1960, I have to say that he will not be missed, neither will she, so they won't.