However Sally actually said very little to the woman who aborted, due to Down's, although she (Sally) was visibly very upset. I think I would find talking to the woman who aborted, with what she said upsetting, if I were Sally.
Her upset was understandable. The woman who aborted did not really seem to have a strongly convincing argument as to why she aborted, not that she has to, not that she has to justify her decision. However, because most people relate other's experiences to their own I can see why speaking to the woman who aborted due to Down's was upsetting for Sally. Sally may have felt better about it, if the woman's reasoning was extremely convincing but it didn't really offer any easy to understand concrete explanation (I do hope more convincing reasoning was not edited out, though).
The thing is people want to be convinced by other's reasoning, over the decisions they make, to accept their decisions are the right ones. However because we think differently, have different experiences, we weight different reasons differently in terms importance. We have to accept people have a right to make certain decisions we may disagree with or not understand.