In "Hills Like White Elephants" by Ernest Hemingway, how does the relationship between the man and the woman change?

At the start of the
story, the relationship between the man and the woman is very uncertain, because as we discover,
they have to decide on whether the woman is going to get an abortion or not. It is the man who
clearly wants her to have an abortion, and the woman who is unsure about this. However, what
changes during the course of the story is the way in which the man is completely unthinking
about what the girl is facing. He keeps on talking about the abortion,...