Hey everyone. this is a long one, I noticed that there is a severe lack of long M rated Jake x Rosa, my favourite Brooklyn Nine-Nine pairing. So, here I amwith the real story of Jake and Rosa.

Please note, this is the middle story. I will be writing a sequel, and i am currently working on the prequel.

Please read and review.

Disclaimer (Relevent for the whole story) I own no rights to Brooklyn Nine Nine, only the plot not shown in the show.

Chapter One: The Start

Jake looked across to the detective beside him in bed. How he got so lucky he would never know.

It all started in the academy. First day, they were paired together for the duration of the course. Given 'Partners' as it were. They found a good dynamic. She was tough and scary, he was eager and determined. They respected each other first, then as time went on, they found a fondness. He made her laugh, and she found herself trusting him more and more. By the end of the First day, they were able to call themselves friends. And a few days after that ... their affair started.

It started from the first day. Friendly rivalry, led to a high adrenaline competition, which resulted in a night of sweaty sheets and multiple orgasms.

One which stood out to them, though. Was a Bank Robbery drill. One which was classed as an active shooter scenario. Much like the Tactical Village they would go to regularly as detectives, it was a simulation training, where partners would go around, being assessed as a team. It was actually quite fun, once you ignored the pressure of assessment. None the less. Jake and Rosa made a great team, and frequently were at the top of the class. After this one Bank Job, they were the only team who didn't get caught, shot and managed to free all the hostages, without a single injury. All in the quickest time.

Despite being humble and modest around their colleagues, that night, they went to Jake's room in the hotel in which they were staying at. The Academy was only an hour away from their homes, but the Academy had hotel facilities for the course attendees, which meant that got to stay on campus for the duration of their course. With alternate weekends to go home and visit family.

Jake and Rosa frequently met one another in their rooms, usually to help with revision and preparing for assessments, but on this occasion, they were celebrating. After the first week of their affair, they vowed not to do it again. That it was a one-time thing, and that they should stay colleagues, and not complicate it further. However, one Friday night, they had a whole weekend off, and Monday they were starting their Emergency Response Driver Training, so aside from a bit of reading they had nothing to do.

Rosa had picked up a bottle of Vodka on her way over from one of the onsite stores, and she and Jake were watching some basketball. Jake had bought a dangerously cheap Chinese take-out and they were enjoying their cheap dinner and basketball. After a few drinks, they started celebrating. A few drinks always helped Rosa open up to her emotions.

"Jake, can I just say, how thankful I am that I was your partner. There is no way I would be half as good as I am with any of those dum-dums" Rosa said

"You're better than me Diaz! The way you took out those Perps today? I was impressed. You don't get that sort of fear-provocation from other officers" Jake complimented

"Thank you" She replied.

One thing led to the other that night. Maybe it was the alcohol. Maybe it was the terrible food that was so terrible it was so good. Maybe it was the euphoria of a very, very successful day. Maybe it was just that after it all they were so close with one another that they could trust them. But that night, what started with an innocent dinner, ended up as another night with sheets messed up, and sweaty thriving bodies lying next to one another. Panting for breath.

It was Rosa who made the first move then. They couldn't remember now exactly what it was that they were laughing about. It was probably some smart-ass comment about one of their colleagues. Some really were laughable. It appears that when they were put in their partners, the First Monday of the second week, the first week was boring paperwork stuff. That the instructors had an idea of everyone's capabilities and had paired them accordingly. Jake and Rosa clearly the best team. As evident in that day's assessment. The celebratory vodka only fuelling their laughter further. Rosa leaned in, and caught Jake's lips in her own. At first, it was very one sided. He held still and didn't kiss back, but as she was about to pull away, his lips moved. And suddenly, sparks went through them both. Starting in their lips, trailing down their bodies and through to every inch of their skin.

Jake's hands went to Rosa's waist, his fingertips trailing up and down, ever so lightly. She moaned at the contact, her own hands starting on his shoulders going up into his hair and down his back again. Jake could feel his growing excitement, which Rosa was very much aware of. The pair were sat on his bed. She pushed him back to he was laying down, and she flicked her hip over so that she was straddling him. Now pinning him down with her legs, her fingers made quick work of his NYPD shirt, pulling it off and throwing it to the floor. Back in the academy, they had an hour of gym time a day, so Jake was supporting a few muscles, ones that really made Rosa's mouth water at the sight. Her fingernails ran up and down the hard, toned muscles and scratched the skin deliciously. Jake growled in animalistic passion, and started rocking his hips up and down. His member now rock hard and pining for attention. She held her hips still and let him watch, as she pulled her own top off, throwing it somewhere on the floor by Jake's. Now long forgotten. He watched as the beautiful globes of her breasts bounced delightfully as she rolled her hips on his a few more times. He had fantasised about her, once or twice. And in the gym locker room, he had seen her in a bathing suit. But he had never seen her like this before. Body glowing, toned, tight, attractive. She was only 21 he was only 23 himself. This was more than his brain could have ever thought of. She knew how to use her body well. And he watched her breasts dance, confined to her bra.

He didn't realise that she had lowered her lips to his ear, until he felt her hot breath sending more shivers down his spine, to his growing member

"Do you want me to take it off Jake?" She breathed lightly

"Mmm, fuck yeah" He replied, breathless. His mind focused only on her. She sat upright again, and slowly unclasped her bra, pulling off the offending material, throwing the fabric on the floor, and sitting square on Jake's hips. She could feel his member throbbing on her, and she craved him deeply at this point. She rocked her hips again, over and over his member, making sure it hit her most sensitive spots whilst simultaneously allowing her breasts to bounce with each rock. Jake was overwhelmed with pleasure, his eyes not being able to come off her breasts.

Smirking to herself, Rosa decided to take this a step further. She wanted him, he wanted her. She was going to make him bed. She stood up. He didn't move just watched her smirk as she ran her hands down her body to the waistline of her trousers, she hooked her fingers under the material, and slowly. Tantalisingly slowly, she pulled off the material, letting it slide down her hips and to the floor below. Jake's eyes drifted down her body, to her silky smooth legs, and then to the only piece of fabric that remained on her body. Her thong. Very thin, back lace material. Hiding the part of her he craved most. He looked back up and caught her eye, as she knelt at the end of the bed, her fingers quickly going to work on his own belt, pulling down his pants, and discarding them on the floor. She eyed up the huge tent in his boxers. Catching his eye, as though asking for permission before taking the next step. Jake didn't need convincing. As soon as he realised that she had stopped to ask for his approval, he let out a passionate growl,

"Please" He asked, in what almost sounded like a beg. She smirked and pulled away the last piece of fabric, leaving him naked before her.

She brought her hand up and down his length a few times. Jerking it to its full extent. Before bringing her tongue to the underside of his member, running it up the entire length, then blowing cool breath onto it. It took every morsel of self control that Jake owned to stop from moving his hips to get himself back inside her. His prayers were answered however, when she licked her lips, then took the head in her mouth, lapping up the tempting drops of precum. Moaning at the taste. That alone was enough to drive Jake insane. But his mind went numb, as she went down on him again, deeper. He could feel her lips at the base of his member. He was not small either. A fair bit above the average, but it was apparent that Rosa didn't have a gag reflex, and was able to take all 8 inches of him inside her mouth and throat. Just when he thought that the feeling couldn't get any better, she pulled off him, sucking harder than he had ever been sucked in his life. A feeling greater than the strongest ecstasy in the world came over him, as she repeated the actions, over and over. Up and down, deeper and harder. He was losing all control. Then. Just when he thought he was about to find his release, she pulled off entirely.

Jake tried to ask her what was wrong, but his whole body was numb, unable to move. His lips tingling and his body aching for her touch. She backed off a bit, and he watched her intently as she pulled off her underwear. Now naked before him, she straddled him again, and ran his member over her dripping core. He could feel how tight and wet she was before he was even inside her. She used one hand to position him, and slipped down his length.

Rosa closed her eyes at the feeling. She had been with guys before, but none of them compared to Jake. He was bigger, sure. But the way he filled her, stretched her out was so glorious, she hoped to never lose the feeling. She was so tight around Jake that he was sure that he would lose it any moment. That was when she raised her hips, and lowered herself back into him. Over and over, making sure to position herself so he hit that spot inside her which made her mouth form that perfect O. Jake placed both his hands on her hips. Her skin hot to the touch, but as soft as silk. She increased the pace, and brought them both impossibly close to a climax. Getting a sudden burst of a second wind, Jake took control. He picked her up, and threw her down on the bed, then lifted one leg up, which she quickly put down by her head, in what appeared to be a perfect split

"Fuck me, you're flexible" Jake muttered

"You haven't seen the half of it" she replied with a smirk. Jake wasted no more time and slipped back inside her. This time he was in control. He pounded into her with a passion and vigour that he had never seen in himself before, and going by the lust-filled glaze of Rosa's eyes, she had never had either.

They were both close. Neither knew how long the other would last. It was a battle of wills, who would come first. In the end it was Rosa. She moaned loudly as she reached her climax, and as Jake pushed her over the edge, she closed her eyes, and became so tight he couldn't even move anymore. Her vice-like grip enough to encourage his own climax, and he came with her. Once they had come down from their unified high, Jake collapsed on the bed beside her.

"Well. So much for just colleagues" Jake said once he had managed to get his breath back, his hand going over to her chest, toying with the pebbled nipple of her breast as he spoke

"No regrets?" Rosa asked

"None at all" Jake replied with a flirtatious smile.

"What to do it again?" Rosa asked with a wink and rolled them over so she was on top. A few well placed rolls of her hips brought him back to full alertness. And they continued into the night.

That was the start of their affair. This continued most nights for their remainder of the time at the academy. The second part of the course was to go and do police work at an actual precinct. Jake was sent to the 76, whilst Rosa was sent to the 29. They never lost contact during that time, and met up at least one night every two weeks. Alternating who's apartment they would be at. The final segment of the course was a fortnight back at the academy. A course made entirely of assessments. Every night of that course they met up, as a stress reliever and a token of good luck.

They even had a weekend away together once they had finished their course. Both had passed and were officially cops. But they knew that they would be working at different precincts. It would be nearly impossible to see one another, or make a relationship work. Instead, they decided to have a long weekend away. After they finished the course and got their badges and guns, the course finished early, and they we're gone by 2pm. They booked a lovely bed and breakfast in Ulster County. It was 2 hours away. Far enough so no one would know them. They agreed that they would not go out They wouldn't date because they would only end up in a long distance relationship. Instead, they would have one last weekend together, and then go their separate ways, agreeing to stay in touch.

They left straight after the course on Friday, and we're coming back late Sunday evening, ready to start at their new precincts on Monday morning. The weekend was incredible. They got to act as a real couple. They got to kiss in public. They had so much sex they swore they wouldn't move for the next month without feeling it somewhere. Then, the dreaded came.

They sat in Jake's car outside her apartment.

"I can't believe this is happening" Rosa said sadly

"I know. I wish it didn't have to end" Jake replied

"What do we do now?" She asked

"We'll stay in touch, I promise. Let's try and meet once a month" Jake replied. Their precincts were only 45 minutes away, but it was finding a time when they weren't both on shift.

"As often as we can" Rosa said. Jake smiled at her. She leant in and kissed him one last time. Trying to wait until she was alone before she let the tears spill.

"You're a brilliant cop Diaz. Go rule that Precinct. Who knows. One day we may end up in the same precinct" Jake said to her. Joking, but loving if that were true.

"That would be the dream" Rosa said. She kissed him once more, and got out of his car, grabbing her bag, and walking into her apartment. Jake made sure to wait until she was inside, and the door had closed before driving off.

They left the Academy in September 2001, and at first they made sure to meet up every two weeks. As time went on, it got more distant. Soon it became once a week, then once a month. By December 2003, it was once every three months at best. That was, until Jake walked into work one day, and found the squad standing in a room, in quiet conversation

"What's wrong?" Jake asked. The captain walked over to him.

"Melissa, who went off to have her baby, has decided that she does not want to return to the police force" He said. Melissa had been on desk duty for the 8 months she was pregnant before her 6 months maternity leave. It was not surprising to Jake that she had decided not to come back. Since falling pregnant, she had become a lot less dedicated to the job, which Jake was sure was at no fault of her own, and respected that she wanted to stay home with her baby.

"What about Julian?" Jake asked, referring to the temporary cop assigned to cover for Melissa whilst she was on maternity. Julian was very strong willed, he struggled to get on with the people in the 65. Jake, and his new partner Stevie were in those few that he did not get on with.

"Julian has not been offered to stay on. His contract runs out next week, and we have actually had someone ask to transfer across" The captain said

"Who?" Jake asked

"Someone from the 12" He replied. At the time the thought of Rosa did not even cross Jake's mind.

A week later, when she walked into the building, Jake's heart once more felt full. Jake and Rosa were kept apart in the 65, but that didn't matter. Rosa had moved closer and she and Jake got to spend some time together at work. The three years had changed things between them slightly. While the feelings had fizzled, they still had a lot of respect for one another, and it was rather soon that they once more continued their affair. Going home together a few nights a week.

It was about three months in, when Stevie went on holiday, and Rosa was assigned to do patrols with Jake. It was a simple job. Not much usually went on. But as it happened, the one day that Jake and Rosa went patrolling, something big kicked off.

They had been patrolling for a few hours, laughing about their time at the academy. They had just stopped for lunch, when something made them jump out of their laughter, and into their training. A gunshot. Not that uncommon in Brooklyn, but one thing did make this one an extreme case. This was followed by a blood curling scream, then another gunshot. Jake and Rosa jumped into their patrol car. Jake driving towards the source of the shots while Rosa radioed dispatch, letting them know and requiring back up. They pulled up outside a grocery store, and inside there were 5 perps. One was robbing the clerk, another had a gun on the clerk, and the other three were guarding around 10 hostages.

Rosa quickly updated dispatch, while Jake made a quick glance around of the building. There was one exit at the back, but that only lead to a dead-end alley. The front doors were the best options.

"We need to go in" Jake said

"Are you kidding? We're outnumbered, and this is an active shooter scenario. We need to wait for back up" Rosa said

"Rosa, if we wait, they're going to kill someone" Jake said

Rosa thought about what Jake said, then thought back to that case back at the academy. "Come one Rosa, we're the perfect team" Jake said

"Fine" She agreed. They wore their bullet proof vests as part of their uniform. They pulled out their guns, and burst into the room.

"NYPD! EVERYONE DOWN!" Rosa yelled. It didn't take much and the guys surrendered their weapons. Textbook case. Rosa and Jake walk all 5 gunmen out, weapons abandoned inside, hands on their heads, as the backup arrived. All 5 guys were cuffed. The two shots were found with casings, found by Jake and Rosa, and the scream was from one of the hostages. Jake and Rosa passed the case on to some detectives who had taken over the case, and returned to the precinct. Once inside, they were called immediately into their Captains office.

"What the HELL do you think you were doing? You were outnumbered. You had NO Back up. What was your thinking?" He asked

"Sir. It was an active shooter situation. We heard screams and gunshots, we had more than enough justification to assume that a hostage had been killed already. Luckily none were, but we used our operational discretion" Rosa said

"Sir, we believed that if we waited for back up, and did not interject, then the gunmen would have killed at least the store clerk. Probably the hostages and anyone who saw them leave" Jake added

"We would never have gone in there if we did not think that we could handle it, or if we had not calculated all of the risks and judged accordingly." Rosa replied

"We conducted a similar scenario back at the academy. The risk that we undertook was outweighed by the potential to save life. No one died, the perps were caught, and our reasons were justifiable" Jake said

"And who's idea was it to go inside?" He asked

"It was a joint decision Sir. I would not have proceeded if Diaz was not prepared, similarly she would not have gone in if I was not" Jake replied

"Ok" He said sitting down in his chair, opposite them. He crossed his arms, and looked at the pair.

"When I was briefed on the situation, I came in here to bollock you both for acting irrationally and endangering lives. However, you two knew what you were on about. You acted well. And where as I am supposed to give you a dressing down, consider suspension, I actually have an idea for you both" He said

"Sir?" Jake asked

"There is a detective's course coming up. How would you two like a promotion?" He asked

Jake and Rosa could not believe their luck. Not only were they in the Academy together, but they had diffused an Active Shooter situation which the Sergeant turned round to them and told them that even he would not have handled as smoothly, but now they were nominated for the Detective Course together.

Back at the Academy was back like old times. 6 weeks at the academy, 6 weeks on placement, and then 2 weeks assessment. Every second that they could at the academy they spent together. Ate meals together, revised, went to the gym. It was nice to get back in touch with one another. Whereas this course was different from the last one, they worked as a unit, not pairs. So, Jake and Rosa still got to work together every day.

The biggest surprise for the pair though, was at the end of the course. They had all passed, and we're given their new precincts. Imagine Jake's surprise when Rosa and him were sent to the same Precinct. The Nine-Nine.

The leader of the course came up to them after.

"I hope you both are ok being in the same precinct. We knew that the Nine-Nine had two openings, whereas the others had one. I know that you two were in the Academy together before, I know that you two were together during the Active Shooter case last year. I asked your old Captain who said that you two are the strongest team he knew. And based off how well you got along on this course, I couldn't see a reason why you shouldn't be paired together, but if you have an issue with it, tell me now, because it's not too late to change the arrangements" He said Jake and Rosa exchanged a smile

"No Sir. We're happy" Jake replied

"Thank you" Rosa added.

Once they had gotten into the Nine-Nine together their affair continued. It was never a relationship. It was never feelings more than lust. It was only trust, respect and sex. But that was all that they wanted. Things changed when Amy joined. At first, Jake was never that interested in Amy but as time went on, as Amy became more confident, he began to flirt more.

Rosa had never minded. She always knew just how much of a flirt he was, and it had never bothered her. But working with him, every day for 8 years, it was starting to get to her. Sometimes she found herself thinking of him when he wasn't around. It was not love. She knew that it was not. But she was starting to get feelings. They met up about twice a week. Sometimes more, sometimes less. But always at least once a week.

Please read and review.