Make out, and converse.

Natsu finally made a move, placing his hands on her cheeks and leaning in, kissing her passionately. Of course, she didn't resist, returning the kiss with the same passion, cooing into it as she plastered her boobs against his well defined chest. They parted their lips, and allowed their tongues to dance together. "Mmmnh..." they both moaned, basking in the sheer sensuality of it as Lucy pushed Natsu down onto her bed, going with him as she maintained the contact between their lips.

He then moved his hands to her back, rubbing it affectionately as they kept kissing, Lucy sucking his tongue. Eventually though, they broke the kiss, and Natsu sat up, and Lucy briefly floated up, only to turn around in midair, and plant her wispy posterior into his lap. While there was no hole to penetrate, she eagerly rubbed his cock with her tail as she placed her back against his chest. "You wanna play with my titties?" she purred. "Go ahead, they're a hundred percent yours to do as you please with~." she assured him. It was so hot to say she no longer owned her own body, that it belonged to her Master as she gave it freely.

Natsu wasted no time, encircling her upper torso with his hands, and cupping her boobs. "Wow... They feel really great," he smiled, before kissing her neck.

"Ahn..." she murmured, continuing to rub the base of her tail against his cock, lightly stimulating it. "So good..."

"...so, uh, how do we... Do the deed when this thing doesn't exactly have a hole to go into?" he asked Lucy, glancing down at her tail as he idly played with her boobs.

"You can order me to have a hole in the right place, or to regain my legs," she crooned, caressing the back of his hands as he continued to fondle her. "Otherwise, the tail stays... I can't do anything about it without your say so. I'm literally physically unable to reform my legs or lady parts otherwise."

"You don't sound particularly upset about that," he noted, pinching her nipples gently, getting a moan out of her.

"Quite the opposite, actually, Master~!" she cooed. "I absolutely love it! This tail is a constant reminder of my subjugation to the lamp's power! A part of my own body, transformed into both a leash and a chastity belt, knowing it will always be like that unless you say otherwise! Whenever an order to have my legs expires, my legs will turn right back into it, with me being completely powerless to resist the transformation! A physical manifestation of my metaphysical chains to the lamp~! It's just, so, hot!" Her tail undulated in a manner that showed her complete arousal at the idea.

"And I'm guessing there's a rule against you picking your own lamp up and floating about as you please?" Natsu guessed, showing surprising insight as he gave her full breasts a gentle squeeze.

"Yep! I can't move it at all, even if I tried!" Lucy giggled, tugging on the lamp with a few yanks of her tail. It wouldn't budge. "Anyone else could pick it up, and walk about with it, and I'd have **** but to go along for the ride, no amount of pulling from me could even slow it down. I'm completely helpless like this, and it's such a turn on!"

"Wow, you really were turned into a submissive by that thing, huh?" he asked, continuing to play with her boobs. She turned a pleased smile towards him.

"Yep~! And it's so pleasurable that I can't get enough of it!" He smiled, and leaned in, capturing her lips with his own again, and making her moan as she eagerly returned it.