Motives? (Spoilers)

I spent half the movie expecting a kind of 'Double Indemnity' betrayal and I'm curious if anyone else was 'thinking outside the plot' too.

Somehow, I felt that a doctor who knew a rich young socialite was going to die and has the immediate desire to marry her, was rather sinister. Did that strike anyone else as a bit opportunistic? Although Judith seems keen to play the rural housewife as her dying wish (later in the film), she is furious when she discovers the good doctor and her secretary seem to have only been humoring her because they knew her prognosis was 'negative.'

While plot takes a great deal of trouble in justifying her dream of being the good Vermont lady of the house to the audience as a reasonable, Hay's Code obedient contrast to her earlier years, they never address Dr. Steele's motives for so blindly embracing her. We are left to simply assume his virtue on her behalf. But it seems an absurd narrative oversight.

Were people comfortable with this, or merely blind to it (Davis' acting often 'overtakes' the story)?