He will initially withdraw his hands and try to give her a look meant to convey, "ARE YOU SURE", because Esta does not actually know why that would be at all necessary or helpful at this point.
But he's not wearing his Rings, either of them, and that also makes terribly little sense in the context of altered-Mariona apparently being obedient and helpful. There are things going on here that he plain does not understand, and perhaps dangers that he knows nothing about.