In the S class mission after it was over. At the dinner table he was super happy to relax with you. You had him laid in your lap and you fed him little fire balls and torches. He had a dragon like purr and it was super cute. He giggled. Natsu held your hands and smiled. "You're so sweet I love you..." He smiles brightly. He patted ypur butt a bit too. "Was your butt always this big..?"