"Soon he was so in love with the witch's daughter that he could think of nothing else. He lived by the light of her eyes and gladly did whatever she asked." - Donkey Cabbages
"Island of Dreams" and "Love Sick" are loosely based on a Grimm tale called "Donkey Cabbages" or "The Donkey Cabbage." In the story, a huntsman goes out into the world and comes across a castle where an old witch lives with her beautiful daughter. He quickly falls in love with the young witch, who deceives him and abuses his love to steal his fortune. (He then ends up stranded in a magic cabbage field and turns into a donkey, but that portion of the story proves irrelevant to the episode.) Hank Griffin clearly parallels the huntsman, and Adalind Schade is the witch's daughter. With her sexual prowess and her love potion, Adalind intends to manipulate Hank's affections to get what she needs.