Yes she does. She gives birth to their child and then she dies.
"Same old boy
Same sweet girl
Five years down the road
Theres going to be a little one and she says its time to go
Doctor says the babys fine but youll have to leave
cause his mommas fading fast and johnny hit his knees and there he prayed
Take the very breath you gave me
Take the heart from my chest
Ill gladly take her place if youll let me
Make this my last request
Take me out of this world
God, please dont take the girl"
Johnny wants to take her place, wants God to take the breath that he gave him and wants to die instead.