The Flower Fairy didn't grasp Lin Yun's maneuver, for she saw all of his actions.
This move was to advance by retreat.
If the Snow Maiden had forgiven Lin Yun on the spot, Lin Yun would have actually found it troublesome because it would mean she hadn't considered her own position at all.
The Snow Maiden's hesitation stemmed from her recognition of her identity; had she blamed Lin Yun, she wouldn't have hesitated.
Therefore, the situation was very favorable.
A brief separation would cause the Snow Maiden to constantly reminisce on his kindness and to come up with a reasonable explanation on her own.
For instance, he hadn't done anything to harm her; he was just protecting his kin.
However, Lin Yun's last few glances, combined with the crystal ball, were the true finishing move.
His eyes conveyed his longing and reluctance, the bitterness showing anticipation in his heart, yet ending in disillusionment.