If it's possible for Grainne's face to go any paler than it already has, it certainly tries as she actually does start shaking in his hold. Weakly, she tries to pull away, knowing full well she's no match for his strength if he refused to let go. "N-no... Please, I've told you..." Desperation to get away could too easily develop into panic, too confused by sudden changes to keep up; she defaulted to a desire for space not just as a comfort thing, but to keep unpleasant memories at bay. The fate of their other children is the last thing on her mind.