She leaves. It's in the lyrics.
"I'm leaving you alone.
You can tend the garden, it's yours.
Separate and alone.
Everybody down on all fours.
All right, mother when?
Lost the beans again.
Punish me the way you did then.
Give me claws and a hunch
Just away from this bunch.
And the gloom...
And the doom...
And the boom...
CRUNCH!"
(and the witch disappears)
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian