Moon touches him lightly at first, until she's more certain of herself, then that grip becomes firm. She remembers things, fragmentally, from previous encounters she has.

She remembers instructions and demands.

So she waits for Indy's instructions, his demands.

And she waits.

When they don't come, she puzzles out that... maybe... there would be none. Only her choices and what she wanted to do.

She thinks about that.

What did she want to do?

Slowly, shyly, she bends her head to him. She's grateful for her hair that falls around her to hide her face as she takes that first, timid sweep with her tongue.