He asks some questions, then accidentally makes a wish.

Natsu gulped, seeing Lucy's clear "come hither" look as she freely offered herself to him. "Lucy, are you sure you're okay?" he asked, not sure he fully trusted this. She seemed so off, almost brainwashed. "Is there any way to undo this?"

"Like hell you will!" she shouted, getting in Natsu's face even more, her old self allowing itself to bleed out slightly, partly out of genuine fear that Natsu might go through with taking this away from her, and partly to show him that she was indeed still herself, just... an evolved version of herself. There really wasn't much "brainwashing" involved. If it could even be called that. Just her very soul being changed to fit her new nature. And both her old self and new self preferred herself like this.

Natsu and Happy yelped and jumped back a bit, but Natsu relaxed a bit after getting over the initial shock. "...okay, yep, you're definitely still Lucy," he replied. "That rage filled response is unmistakable..."

Lucy allowed herself to relax, and smiled again. She had briefly felt bad about yelling at her owner, but that passed as she realized that he had needed to see her in a familiar manner like that. "Ahem, sorry about that, Master..." she shrugged, making her breasts jiggle a bit. "But there are only two ways for a Sex Genie to be freed. The first one is the one I much rather prefer: I serve my Masters and Mistresses over time, and once I have granted enough sexual desires to satiate the lamp for a while, then I finish serving whatever Master I have at the time, then it will spit me out, and move on. Thankfully, that's going to take centuries, at least, I don't want to go back to being human anytime soon... The second method is to wish me free, but then either you or someone else you offered up would have to take my place... well, there ARE other methods, but those are the only two that are feasible in this world, and quite frankly, I wish neither would ever occur," she asserted floating around Natsu in circles, her tail passing through him several times.

"...so, you're basically a ****?" Happy asked, a bit worried.

"Eh... more or less... if you wanted to be pedantic, then not really... by definition, a **** is someone **** into servitude against their will... and while the lamp initially claimed me against mine, going the route of asking forgiveness instead of permission, I'm certainly not complaining~! If I could go back in time before I picked up the lamp, I'd do it again a hundred times over! So, technically, it's more accurate to call me a servant than a ****... but calling me a **** is so much hotter, so I prefer that!" she chimed. "Who really cares about the semantics anyway?"

"But what does that mean for our adventures in the Guild?" Natsu inquired, not wanting to lose that dynamic with Lucy.

"Oh, Master, it doesn't need to mean anything! In fact, I'm hoping I get to continue working with you all! Like I said, I am still Lucy, and have all of my old desires! Albeit, they're secondary to my desire to please you, but they are still there!" she assured him. She then paused. "Oh, right, my Keys!" She immediately floated to a drawer and opened it up. "...phew, they're safe. Was slightly worried someone might have taken them while I was in the lamp... not that the odds were high, but still..."

She then turned back towards Natsu, and floated towards him, leaning forward and cupping her chin. "So... would you like to make a wish? Anything you want, my powers will be able to grant it, so long as you include a sexual reason or element to the wish..." she purred.

Natsu was speechless at that question. He was so new to romance and potential sexual relationships, that he honestly had no fucking clue what he wanted from Lucy. She was definitely hot, pretty, and got his motor going, but he didn't have a road map! "Gah, I don't know!" he panicked slightly. "This is kind of foreign to me! I wish I knew what to do in this situation!"

Lucy's eyes brightened, before glowing violet. "Wish granted, Master!"

"Wait, wha-?" Natsu asked, before holding his head, his mind bombarded with all manner of sexual and romantic knowledge. It was... a lot to process, and yet, it all flowed smoothly into his mind, settling seamlessly so as not to overwhelm him, and it honestly felt kind of pleasant. "Ah... okay..." he blinked. He looked at a grinning Lucy again, through new eyes. "...that wish wasn't meant to be granted, but I'm glad you did..." he smiled.

She shrugged innocently. "Sorry Master, just wanted to help, but I unfortunately can't really use my new powers unless you make a wish, so... I took a leaf out of the lamp's book and asked for forgiveness rather than permission when you gave me that opening."

"...well, you got it," Natsu admitted, now feeling like he knew how to handle a fully submissive Lucy to give them both a great time. "...I still need to be careful with the "w" word in the future though, I see..."

"Aye!" Happy sniggered, watching this surreal scene from the side.