Insist she take you to her kingdom

Your curiousity is piqued, so her inexpert ploy to divert your attention fails. "If you're an elf, then prove it. Take me to your kingdom. Either that or I leave you sitting on a tree trunk out here."

She gets a dark look in her eyes that you think is very sexy. She glares at you for a full minute before she answers. "Okay, but you can't be seen or they'll trap you or kill you." She scrunches her eyes tightly shut and murmurs under her breath for a few seconds. When she opens her eyes again, she looks at you approvingly. "Okay, now you're invisible. I'll take you and show you, but you have to stay out of the way."

"Yeah, sure I'm invisible, 'cuz you cast a spell on me," you say sarcastically, chuckling at her pretense.

"That's right. Take a look!" she points at the surface of the lake.

You humor her and move so you can look at your reflection in the water. You see a perfect mirror of everything above you: trees, leaves, clouds, and sun. You don't see your reversed face looking back at you, just the unbroken image of everthing else. You start, surprise registering on your face. You look again from every possible angle, getting closer by kneeling at the water's edge. No where can you see your reflected face.

"What did you do? This must be a dream." You must have fallen asleep on that rock, and started dreaming of little elf girls. You pinch your arm hard and wince at the pain. You open your eyes thinking that you'll be back alone at your campsite, only to see the pretty girl standing there watching you.

"Do you believe me now?" she said, annoyed. Everything about her is just so cute: her stance with one hip cocked and her fists on her hips, the frown on her face, the way her lips moved when she talked.