Not enough

Jack had been fucking Nami for the past 3 days but he couldn't get to perform as well as the first day after it, he was pissed off, how was he supposed to break Nami and turn her into his fuckpet if he didn't have the stamina to do it? All those novels he had read made it seem so easy. But he didn't want to surrender, he was already halfway there he only needed something more to help him make the last push. A devil fruit perhaps? With much he had already saved in his retirement plan he could easily ask for one, the government had a lot of tools for marines to get stronger if they showed the potential, but others like Jack had to pour all their savings into getting one, in moments like this he always felt envious of the Almirants and Vice Almirants.

Reading through the catalog he couldn't find something that would help him:

Mouse-Mouse Fruit, Dog-Dog fruit, Spark-spark fruit, etc...

In the damn catalog, there were only common and weak fruits, nothing that would help him with his goal. Still, he couldn't also just come to his superiors and ask for a fruit that would enhance his sexual prowess, he would become a joke, he read the catalog from start to finish, who in the damn world would want a Tent-Tent fruit and become a human tent, this catalog was shit, of course, they would keep the good fruits for the high ranks of the Marines, Jack slumped on his desk, he didn't saw any solution to his predicament, using **** was out the question they were a way to destructive to the body and wouldn't be right by his morals, he was very petty. Maybe he agreed with a lot of the new fleet admiral's way of thinking but at the very least there was a line he wouldn't cross just because it would make Nami a mindless doll and he didn't want that, he wanted her to submit and worship him.

"I just wish my solution would walk into me like that, its that so much to ask?" Jack asked himself as he started to hear footsteps approach his desk.

"Hey there Mr Chief Guard, I'm coming for the regular," a very tall woman with blonde hair and a skimpy futuristic outfit told him.

She was one of those Vegapunks that always came to check on the inmates, he knew she wasn't the real one, this was just a robot that had part of the old man inside of him, Her name was York if he remembered correctly, she handed him some documents for him to sign, she was going to check on some of the inmates with devil fruits to extract some of their DNA and run some test on them, this time she was going to see Doflamingo on the 6th level, Jack signed the documents and before York went on her way she saw the devil fruit catalog dumped into Jack's thrash bin.

"Wanna have a fruit of your own Mr. Guard?" she asked Jack with a mischievous smirk, "you know all these fruits have been gathering dust in the Marine Headquarters for quite some time, that's why they started to give these catalogs around hehe" her teasing only made Jack's mood worse, he had already told himself that, that catalog was a bad joke.

"So you want a devil fruit? Why would you ne...." she walked around the desk to tease him some more and she saw into his screen where he had monitoring Nami, he had access to all the den mushies in this Level of Impel Down but while Nami's image took almost 3/4 of his screen every other cells were cramped into a small window in the corner. "Ooooh.... so you want to tame the wild cat hehe.... then maybe this can be a good opportunity," York said before Jack could minimize the window, she had gotten his attention with that What do you mean... you want to help me?" Jack asked, baffled by the intentions of the scientist before him.

"Well let's say I don't get a lot of people willing to test some of our advances, not in the devil fruit department at least. And I had been working on a special project that the others wouldn't approve, but you look **** enough to try... what do you say? Wanna be my guinea pig? This fruit is a good one" York said with a manic smile on her face, she was just as mad as people talked about and she was just one part of the Mad Genius himself.

From her bag York pulled a strange fruit that glowed a crimson hue, it had the shape of a heart but it looked wicked, nothing like Jack had seen before, he had seen a lot of photos of the actual fruits and none of them had such eerie looking glow around them, he felt it was calling to him.

"This is an experimental fruit never seen before, a hybrid made of other zoan fruits. I call it the devil-devil fruit Mythical model Incubi" York explained, she was twirling the fruit in her hand as she presented it. "This bad boy here is a 100% york original, taking some of the most wicked aspects of other fruits and condensed into this pretty thing, if you eat it you will become its first user ever" she offered him.

She was giving him a Mythical Zoan fruit just because she felt like it? Jack was astonished but he wasn't stupid he knew there was more "What's the catch, what do you want from me?" things like this never came at an easy price, but Jack had nothing to lose.

"Oh nothing much really, just let me monitor your advances with the fruit and the functionality of it, I can't eat it myself or thrust me I would already be a succubus before you." York said with a lazy smirk "Then what would it be Mr. Guard, you want it or not?"

"Ok ok fine I agree, better this than the stupid tent fruit" Jack took the fruit from York and inspected it a little, he could feel it thrum like a heart.

"Tent fruit? Is that garbage still on the menu ? Hehe, then don't mind me bottoms up" York said before pushing the fruit into Jack's mouth, Jack caught off guard and swallowed it whole. He started to hear a pitching noise as his heart thrummed with ****, suddenly everything went dark and he just slumped back on his chair.