I think Michael was in hell, on earth, still alive...that must be the worst kind of hell? He was visited daily by demonic dreams of the horrors he had done to his family...killings of people, killing his father's son...He was being punished with sickness. He lived a long life and at his death he did not suffer, he just died. Nurses say when you are a bad person in life, you have a long hard death...but Michael just died sitting in his chair, being lonely and living with the horrible memories of his life.
As for Kay,she had an abortion and for that she goes to hell...she had no soul or taste in clothes.