Wish Me Dead

The funny thing is I never even meant the first one.
Now I bitterly regret visiting the cursed witch's house, deep in the middle of the forest. It's where I made my wishes.
I wished Klara Klein dead.
It came true.
I wished for the most gorgeous boy in town to finally notice me.
It came true.
I wished to be rid of the poisonous busybody who destroyed my family.
It came true.
I didn't mean for this to happen. Not me, Steffi Nett, the shy one who never says anything. But as the body count increases with every wish I make . . .
Who else could it be?