First, they get naked!

"Alright then, Lucy," Natsu sighed in anticipation, before shrugging off his vest. "Let's get a little more comfortable..."

"Oh, I like where this is headed~!" Lucy grinned, immediately reaching for the hem of her harem top. As she did so, she added a sensual sway to her upper body.

Natsu then turned to look at Happy. "...I think it would be weird if you stuck around to watch. I'll give you a fish later if you make yourself scarce."

Not particularly interested in sticking around either, but seeing a chance for free fish when he saw it, Happy decided to go for more. "Five fish, and you have a deal!"

"...three," Natsu stated as he worked on his pants.

"Aye!" Happy agreed, sprouting his wings and launching himself out the window, quickly flying back to the Guild Hall.

Natsu turned back to Lucy, who had waited until his attention was back on her to start to pull the top off, her boobs being pulled up with it briefly, before falling back into place with an enticing jiggle. Not that this really exposed them, they had already been clearly visible through the top, but this had its appeal too. She dropped the top, grinning as she floated, placing her hands behind her head in a provocative posture, her tits jutted out and hanging free for his visual consumption. She turned back and forth in place slightly, making the large mammaries jiggle some more, adding more to her visual appeal, and clearly inviting Natsu to gaze upon her more.

Natsu slid his shorts and boxers down, kicking off his sandals in the same motions. Now clad only in his signature scarf, he straightened up, his dick quickly growing to full mast. He grinned, standing unabashedly nude as he placed his hands on his hips.

Lucy, still displaying herself wantonly, let her gaze flicker down to Natsu's manhood, allowing herself to drink it in. His cock was absolutely beautiful to her eyes, given her new genie **** wiring. It wasn't just a cock to her anymore. It was her Master's cock. She could stare at it forever, and never get tired of it.

Natsu, realizing it, chuckled as he waved his hips a bit, returning the favor she was giving him with her breasts, making his dick sway for her own viewing pleasure. "Liking what you see, aren't you?" he teased.

"Oh, yes Master, very much so~!" she beamed at him, before giggling. "... it's rare for the shoe to be on both feet, isn't it?" she quipped, referring to all the times she had been naked around him. Although those other times had been quite unintentional on her part. Now they ware naked in each other's presence.

Natsu chortled a bit. "Yeah, it is," he agreed, before beckoned her over. Not needing a written invitation, Lucy floated right up to him, placing her hands on his shoulders, and gazing right into his eyes.

He returned the gaze, and neither of them moved for several minutes, nor said anything. The didn't have to. For the moment, they were both content to just lose themselves in each other's gaze, in the tender intimacy of the moment.