He gets Cana to show off her tits.

Cana moaned into the kiss and pressed her breasts into his hands as they explored her soft mounds. She then broke the kiss after a minute, with him giving her boobs a final squeeze before she pulled back.

Natsu then saw Cana covering her chest again, and smirked. "Hey, can I see your tits a bit better?"

"Don't push your luck Natsu," she huffed a little.

"Right, sorry," he grinned. "Lucy, show off your boobs for me."

"Right away Natsu!" Lucy grinned, taking her top off completely, and placing her hands behind her head. Cana watched, blushing as Lucy did so, and moved her arm from her breasts, putting her hands behind her head as she did.

She then watched as Natsu had Lucy wave her breasts, and started doing so herself as Natsu turned his gaze on her. She wondered briefly what was getting into her, but she could not help but enjoy this.

After a bit, Lucy stopped, and Cana let her hands drop to her sides, and did not cover her chest again. She blushed a bit more, realizing she was hoping Natsu would ask her to do it again.