I mean, depending on one's view of when life begins, what is the difference in this circumstance between abortion and just avoiding having sex at the time she knows she would conceive of this child. Either way she is making a choice to prevent a life from being, for at least a plausible reason.
If we are going to take on the abortion analogy, and we consider her selfish for having the child who she know will suffer, is it similarly selfish to not get an abortion if you have limited means and thus the child will be born to material suffering? Is it selfish to have a child you know will have physical or mental defects that will make its life harder? We almost never phrase having a child as selfish, and society is vastly more likely to consider having an abortion as selfish. It is interesting that in this case the former does get some play.
Of course, my previously stated maximum morality fits in with my general comfort with euthanasia vis a vis abortion (which I am politically supportive of but personally conflicted about).