She tilted her head enough to lean it against his, grinning, "I could take you by surprise, though, you never know~!" She purred, wrapped so much in him she barely even noticed when they walked back into the guild. At least until she heard the children's voices lifting in 'ewwwwww' and giggled responses.

Blushing fiercely, she abruptly pulled away from Natsu and cleared her throat. You saw nothing.