Complex sentence: It is hinted that she has a weakness for cute things, specifically rare and inexpensive stuff animal toys when she forgave the Finians when they tricked her because if she forgave them, she can have the rare king penguin stuffed toy.
Split into simpler sentences: It is hinted that she has a weakness for cute things, specifically rare and inexpensive stuff toy animals. When she forgave the Finians, when they tricked her, it was because if she forgave them, she could have the rare King Penguin stuffed toy.