Hello there, it has been years since I've last written any fanfiction. I never published my work on here only on fanfiction. Let alone finished a piece to actually put out. I have been reading them all these year but only recently got back to the NCIS/Tiva fandom.
This is a canon au since Ziva is a werewolf/shifter in this story. I might highly be influenced by the books I am currently reading. When this popped in my head I could not not write it. I hope you guys enjoy it. posted on fanfiction and ao3

This was a very dangerous game they were playing. Had to play. Neither she nor Tony had a choice. Not that Tony minded even if Ziva did. This of course she could not tell to anyone. That conversation would not have gone over well.

"No I cannot go undercover and pretend to be married to my partner. I know what this mission calls for and I cannot risk my wolf getting to comfortable or she will want to stay with Tony even more than she already does"

yeah, no, that had not been an option to tell Gibbs. And so, here she was. Dressed up and entering the hotel room as Sophie Ranier.

Every touch, every look made her wolf happy. It had never been this way. Every other undercover mission Ziva had ever been on before did not confuse her wolf like this. Her human and wolf half had always understood the difference between a mission, between duty and their own personal lives. Even though Ziva could feel her wolf understood on some level that this was an act she was still restless. It was a chance for her to be close to her mate. To touch, to smell, to look without Ziva pushing her back. She wanted more, she wanted to be able to challenge her potential mate. Wanted to see if he was truly as worthy of her as her soul felt he was of her.

Even if she wanted to, at that moment she didn't think only acted. Or maybe it was her wolf that pushed her. Took control. When he opened the doors to the tv she was no longer thinking. She just acted, walked to him. Pleased that at once all of his attention was on her.

"There is only one thing I am interested in right now" She looked at him and leaned forward. Both coming together. Their lips meeting.

After that Ziva could not exactly remember what happened. Being fully contend in being surrounded by nothing but Tony. All she wanted to do was touch, scratch, lick, explore every inch of him. She could not let that happen.

"you can get off me now"

Having Tony above her, his weight almost fully on her, no escape from his scent. It almost made Ziva feel a little bit drunk. If she didn't get him off of her at that moment she did not exactly know if she could get her wolf to stop. And for a moment she could not remember anymore why she was holding back. Why not let her wolf take charge. And take charge she did.

In a move challenging his dominance over her she rolled them over so she was on top. His eyes wide at the shock of what just happened. How easily she turned them. Words were spoken and she kissed him again. Had he been a shifter he might have tried to turn them around again. Tried to take the upper hand, to act on the challenge she had given his inner wolf. However he stayed as he was, just staring at her. Not acting further on her challenge.

Her wolf whined in her head. She didn't understand why her chosen mate was not acting on her challenge, why he would not participate in her play. Because for an alpha female as she was she wanted, almost needed, her partner to earn her submission. She needed a mate she could completely trust to let her guard down around. One way to find out was to challenge his dominance at a time where she was vulnerable. Like she was, naked underneath the bed sheet they had wrapped around themselves, she could not get any more vulnerable at that moment.

Ziva tried to push her wolf back to regain full control, her wolf may not understand but Ziva did. Tony could not participate in her play for dominance for he did not even know that he was being challenged. He thought it was all an act to make anyone who may be watching them to believe they were Jean Paul and Sophie Ranier. To thrill seeking assassins, married and in love.
Ziva tried to get her wolf under control. Push her back so it was only Ziva who could influence her own actions. On one hand trying to keep Tony safe, for she might be able to heal fast but the scratches she liked to leave on him would heal slowly on him. May even permanently mark him. On the other hand she wanted to protect her wolf. For if Tony would continue to act as Ziva knew he would her wolf might feel rejected by the one she called mate. If that would ever happen Ziva knew she could not stay at the place she started to slowly call home. If her wolf thought Tony rejected her it would hurt too much to stay. And while she missed the feeling of pack, the feeling of belonging back in Israel, having to leave the team would hurt more than a little bit of homesickness.

It is just a mission, Tony is acting, this does not mean anything. Even if he would accept the challenge right now how could she tell if he was acting or not. That final thought helped her push her wolf back just enough to back off. To let Ziva regain full control.

Everything that happened in the night and day after that was as much torture as it was heaven for her. Being able to touch him freely, to cocoon herself in his scent at night and wake up with him touching almost all of her. Her wolf relished in it, Ziva the woman also thoroughly enjoyed it. Knowing it was all an act, knowing he would never be hers was torture.

Those moments should last her a lifetime. It would be the closest her wolf would ever get to being his. Being his partner at work, being his friend would have to be enough. She knew they could never be more. But so what if she took those precious last moments where he needed to be supported by her as they made their way to the elevator, to bask in his smell. He might never be actually hers but if she could she would do anything to keep him in her life.