[... Okay, this? Sanji isn't sure how to categorize. "Never walked before" is not on the suspicion list because... well, she looks plenty human to him. Perhaps it's nerves? Except she doesn't strike him as particularly scared either; just distracted, making sure she doesn't topple over.]
Are you... sure you're okay? [For now, he'll just stand still, and be ready to catch her should she lose her balance]
[Action]
Are you... sure you're okay? [For now, he'll just stand still, and be ready to catch her should she lose her balance]