They kiss at the end of the episode. Although she and Gibbs plainly have strong love for one other, she is frequently disappointed by his unwillingness to verbalize his sentiments. She recognizes this as his indirect way of committing to their relationship for the long term and kisses him passionately. Gibbs does not appear to be attracted to Allison but there is no evidence to suggest that they are not together forever. They just need time to grow up and mature together before entering into a romantic relationship.