I think you are only trying to nail down the degree to which her current life is worse than the one he offers. But it rally is not the point the story is making.
It’s arguing two things:
1. Refusing him will give you a fate worse than anything you can even wrap your brain around.
2. Is that the way God does things?
I searched scripture and can find not one case of God tormenting his enemies eternally. It was always the same: He put up with them until he was done and then he ended them.
And that’s the thing. What does Jesus save us from? Death - which is the wages of sin according to Romans 3:26.
But He offers a better way - eternal life with Him.
Rev_14:11 And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name.
Rev 20:10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
hey are destroyed, first the tent they occupy (the body) and then they are destroyed (the soul).
Destroy, in the biblical sense, is equivalent to punish and torment for all eternity. The soul, being immortal, experiences "death" when separated from the body, "death" when separated from their first estate and plunged into a new sin nature, and "death" when separated from the presence of God.
Revelation 20:15
And whosoever was not found written in the book of life was cast into the lake of fire