Hi BrightEye. The book says the flower in the cauldron is an ox-eye daisy for "innocence" and "faithful love." There's a sexualized element in the way he's holding her wrist and she's stroking his palm. Not the "childhood" kind of innocence that the Rider deck brings to mind, eh? But the ox-eye is the flower we use for the "he loves me, he loves me not" game of pulling off petals until the last one tells you...loves you or not...which is what a young person might do (whereas a less innocent person might send a text message, luv me?).