"You're about to be surprised, then, and I'm more interested in the flavour. The point is to paint it on and then lick it off." She doesn't address the question about someone specific, because up until a few moments ago she wasn't actually planning on buying any body paint. It's a far more playful and intimate thing than she's usually interested in. The stall she's taking him to is entertaining, though, and she's mostly amusing herself with the promise of getting to watch Illya roll up his sleeves and lick stripes of the stuff of of himself. He might end up wishing he'd gone for the cupcake in the end.

And, of course, because she can't just leave it alone entirely, she nods her head at the bag he's carrying, the book in it. "That's more my idea of art in the bedroom." Make of that what you will. Most people guess her motivations incorrectly, and she's fine with that.