Lafiel's hands kindof do this useless, feckless twiddling thing. She spends visible effort getting control of them, trying to get a mental handle on the situation.
She reframes it as if she were dealing with the one type of creature she allows to touch her like this. She relaxes and strokes Meluly's hair in the exact same way she would stroke her family's cats. She doesn't say anything but silently urges her to go on.