from the comments about the movie, it seems like they really played up, or even created, the idea that his relationship with this woman was basically an endurance of sexual abuse. in the book, there was no hint of that, at all. sure, she shaped much of his life that followed, but never was it in a damaging sense. and there was no strange relationship with his daughter. only the unfortunately common occurrence of divorce...
i'm thinking that perhaps the writers and filmmakers added that element into the film, because it surely wasn't in the book. perhaps to make the character carry an even heavier cross into his adulthood, not one that was simply a changing experience, but a complex and even damaging one. that, or they felt it was far more PC for american and english audiences to see a child and an adult in that kind of relationship as wrong, with damaging effects (which it is, and does have, i'm just saying the book doesn't seem to concern itself with whether it was right or wrong).