Shae and the Monsters, from A Storm of Swords, book three in A Song of Ice and Fire.
SPOILERS, for slow readers like me.
The one scene in this book (where Tyrion comes down to see Shae between the dragons jaws) stuck with me the rest of the way. Regardless of how their relationship played out, Shae is one of my very favorite characters. Though she is meant to be sultry and have such a ‘wicked smile’, wanting to be saved from the jaws of the monster and play with Tyrion was just so innocent. She’s only 18 afterall.
This image began as her leaning naked against the teeth, looking sexy or whorish or however. Instead it changed into a young girl who is scared as to where Varys has taken her, alone in the dark surrounded by monsters as the faint light of a lantern approaches from an unseen passage.