Luna locked eyes with Merlin, seeing that his joy and happyness had returned to him, and that she herself had caused that to happen. She would always try to protect him, an she knew that he would do the same for her. But she also saw in his eyes something deeper that was starting to grow between them. She didn't know what he saw in her eyes, but she had a feeling that he saw the same.
Their bodies did indeed touch and so close where they that Luna felt tempted to kiss him as if some force was driving her close enough to do so. But what the shifter didn't realize was deep in her soul there existed the female spirit that had once been Merlins wife, and she had always promised him that she would find a way back to him, even if he didn't recognize her. That spirit only emerged itself once to reveal its presence in Luna's eyes, and then receeded back to allow the present soul to be seen only. The only reason that spirit had revealed itself to Merlin that instant was to give him hope, and to follow his heart to start anew.