Ummm…yes! Of course I would make that compromise! If I have a choice between they both die or one dies, of course I’m taking the choice where one lives!
What wouldn’t I be willing to compromise on? Nothing. If I have a choice between bad and worse, I’m taking bad, what kind of lunatic would intentionally choose worse?
Nice attempt at using the curse, but I see another possibility:
She dies that night anyway. Comes back undead. Is killed at the appropriate time for the necklace curse. Curse fulfilled.