Luke was not the sort to jump to conclusions. The cheerful redhead was charming, and helping his wife. He could wonder at her knowledge of him later. For now he'd just accept that this Willow knew of him and his wife.
"Thank you," he said with a smile when Willow was done. "Thank you for healing my wife." He smiled down at Mara, and almost laughed a little, "now you may argue how you are just fine all you want."