@Siena No, she didn't. It was an impossible choice. The vengeful spirit might as well have killed both of them, and she just stopped the death of one of them.
@Siena i think what happened is that her words somehow influenced the vengeful spirits' actions, purely by chance. so she didn't end up killing the kid even though she probably was planning on it
so the doctor's son is now "saving" souls? i don't really understand why he would do that since there's so many people that die on a daily basis and i don't think he's stupid enough to think he can save everyone