How are Tom and his wife alike?
They are two of the most miserable human beings ever known. They live to make one another's lives miserable. The only reason that Tom does not take the devil up on his proposal is to spite his wife, not because he has any conscience or worry for the state of his soul.
His wife is equally uncaring of her husband. She had planned to go out for herself, and gets herself killed. Tom does not mourn his wife's grisly death, but it would be a fair assumption to say that she would not have spent any time mourning his death, either.