This is also wrong in terms of the actual fics I mentioned. In at least one of them, Fractured Triangle, the decision to keep the baby comes at the end of the story, which is concerned with Lucius' atrocious rape and its terrible consequences. After the story Fyre told, nobody would be surprised if Hermione decided to abort the baby, and her decision not to do so is one of the climaxes of the story. It is obvious that the message that Fyre is conveying is that keeping a baby, even the result of the most awful rape, is morally better than destroying it; it is the kind of thing a heroine would do.
Re: plot device