AN: ok so this fic is based on the 51 rules that mighty Gibbs came up with. Obviously I don't own any of the rules or Gibbs for that matter.

Some of the chapters will be M rated, so if that's the case I will warn you beforehand.

Chapter name: Rule one - Never let suspects stay together

Pairing: Tony/Ziva

Rating: the rating before mature. I don't usually read or write anything that's not rated M so I don't know what that rating is :D

2 AN: I reckon when Gibbs gets up in the morning he recites this:

'When I'm having a bad day and it seems that people are trying to wind me up help me to remember it takes 42 muscles to frown, 28 muscles to smile and only 4 muscles to extend my arm and smack your head.'

My friend sent me this and it seemed to fit Gibbs so well. Anyway on with the story.

It could be a case, maybe that's why they were called in so early. Except if it was a case then they would go straight to the crime scene. And why was it only the two of them that were called in.

Tony and Ziva waited for their boss to enter the bullpen. Both of them pretty agitated and slightly concerned because a) it was 6 in the morning and b) the boss never arrived after them, especially when they were called in by him in the middle of the night.

The two agents shared silent looks mostly because they were too tired to say anything. They almost missed the silver haired agent whizz past them.

'Follow me.' He ordered never looking behind to see if they were in actual fact going to follow him.

They both followed still not knowing what the hell was going on. They both also knew that the tone of their boss was such that questions could be asked later, or maybe in his case never.

The door of the interrogation room held open for them the probationary and senior field agent looked confused.

'Get in.'

Again both of them wanting to ask questions but didn't dare to. Three chairs surrounded the desk. The very desk that Agent Gibbs had slammed files and his fists on.

'Probationary agent Dahveed what's rule number 1?' Gibbs seemed very calm when asking the question, but still didn't look at the two agents at all instead he chose to stare at the blank wall.

'eh..to never let the suspects stay together...' she answered still slightly sleepy and even more confused.

'Well agents, today I'm breaking that rule. You know why?'

Neither answered.

Gibbs finally turned to face them and then pointed to the bin near the door.

'Because you broke one of mine.'

OOO

Yesterday

'Look just because said I wanted to keep healthy doesn't mean I didn't want a doughnut. ' Tony stated in a matter-of-fact way.

'Yes it does Tony. Besides why are you still hung down on it, it happened this morning.'

'Because, I like my doughnuts Zi. And its hung up, not hung down.'

Ziva opened her desk draw and handed him a paper bag. 'I knew you were really upset so I went out at lunch and bought this for you. Enjoy.'

Tony opened the bag to find a doughnut inside. A smile couldn't help but escape from his face as he sat back on his seat and sank his teeth into the sugary treat.

Gibbs had gone and left the two of them to write up the week's report and McGee had a book signing and had taken Abby with him, leaving the two partner's in the office on their own.

A nearby church chimed midnight and still there were a few pages more to write. It shouldn't take too long, except with Ziva's English and Tony's distractions they were getting no-where.

Ziva looked up at Tony to ask him about the phrasing of a certain sentence, when she saw that he was sitting there with his eyes closed chewing slowly. A little dab of jam was on the corner of his mouth and Ziva's own mouth watered. She got up and walked towards him. Tony still had his eyes closed.

She put a knee on each side of him straddling him. That got his eyes open.

He looked at her confused but still a smirk forming on his face.

She leaned in close and Tony held his breath.

Sticking her tongue out she licked the smidge of jam. Her tongue lingering on.

Pulling away she looked into his eyes 'You had a little something on your lip.'

Tony swallowed and then took the rest of the doughnut and rubbed it against his mouth leaving sugar and jam behind.

Ziva caught the water, no drift and went in to 'clean' it off. Tasting the sweet substance and smelling Tony's cologne was leaving Ziva with a desire pooling between her legs. Feeling that she had done a good job of licking and sucking him clean, she began to pull away again only to be pulled back in. Tony had one hand around her neck and the other working its way up her top.

Her mouth still tasted sweet and Tony relished the taste, sighing as he deepened the kiss.

The elevator dinged and the pair quickly parted.

Gibbs walked in. He looked at the pair and knew something was up. He was just too tired to bother to ask.

He grabbed his wallet and just before he got into the elevator he turned and said or rather ordered the two agents to go home. Ziva swiftly picked her bag and headed for the elevator with Gibbs leaving Tony a little gobsmacked and frankly disappointed.

OOO

'Gibbs, we did not break any of your many rules.' Ziva said. Her face a blank slate. She looked at Tony expectantly and he shrugged his shoulders before agreeing.

'Yeh Boss, Ziva's right, we didn't break any of your rules' he looked at his boss's face 'Which rule are you referring to?'

'You both know which one.' He replied looking at the bin again and then he left the room.

Upon his leaving, Ziva turned to Tony. She only had to look at him for him to know that he was in trouble.

They both walked towards the bin and then realised which rule Gibbs was talking about.

The condom was staring them in the face.

OOO

Tony grabbed his bag but he had missed the lift. He couldn't wait anymore. He went for the stairs. He wanted to catch Ziva before she left. By the time he had reached the bottom of the stairs he was out of breath. Panting loudly he looked around the car park to find Ziva. She was nowhere to be seen.

He saw her car still parked. Now he was sexually frustrated and more confused than ever.

His phone vibrated.

'Where are you? I'm in the bullpen. Z x'

He looked at the text and then ran up the stair again. He reached the top and then realised that he could have taken the elevator.

Through his panting, he saw Ziva perched on his desk waiting patiently.

As soon as she saw him she stood up and walked towards him. Tony stood straight too and tried to control his breathing trying hard not to make it obvious.

'Why did you take the stairpath?' she asked.

He didn't answer. Instead he grabbed her by the hips and pulled her near. Crashing his lips against hers he kissed her.

Their tongues entered each others' mouths and they both moaned.

He pulled back and rested his forehead against hers 'I wasn't thinking properly.'

They couldn't get enough of each other. So many years of sexual innuendo and attraction.

'What if we get caught?' she asked in between kissing him.

'We won't get caught.' He grabbed her arm and took her to the interrogation room. He switched the light on and closed the door.

OOO

'You told me we would not get caught!'

'Yeh I did,'

'Well Gibbs knows.' She said punching him in the arm.

'OW Zi.'

Ziva was going to yell at him some more when all of a sudden they heard moaning.

Loud sighing and moaning.

Both of them turned beetroot red when they realised that it was a recording of their voices.

The light in the interrogation room went out and they could both see across the glass. Gibbs was pointing to a screen and on the screen was Ziva lying on the desk as Tony was penetrating her.

Gibbs switched the light back on as he realised that they both knew they would in trouble.