«Wishcraft» by Ashley Ladd

Felicia likes to dabble in love potions, but when she brews one for her old enemy Acacia, it goes awry when Acacias intended, Jeremy Knowles, falls for Felicia. Jeremy pursues Felicia and although she fears its only spell-induced, Felicia can't resist his charms. She only hopes that she wont be forced to turn Acacia into a toad to keep the secret so that Jeremy wont find out, before she can confess her sins.