One motivation could be revenge. Maybe someone from her past in Mossad or a past case she worked on in NCIS has a grudge against her and wants to make her suffer. Another motivation could be that she has some valuable information that a bad guy wants to get out of her, like details about a secret operation or the identity of an undercover agent.
In some NCIS fanfiction, Ziva could be pregnant. Fanfiction often explores different scenarios for beloved characters. Writers might create a story where Ziva's pregnancy brings new challenges and developments to her relationship with Tony. It could be a plot device to explore deeper emotions and create more complex storylines within the NCIS universe.
If Ziva is pregnant in fanfiction, their relationship could become more intimate. They would have to rely on each other more. Tony might become more protective of Ziva.
Maybe she had a bad memory from her past resurface. For example, something related to her time in Mossad or her family issues could have triggered her emotions.
Another plot idea could be that the child starts to suspect that there is more to Tony and Ziva's past work at NCIS than they've been told. So the child begins to investigate on their own, getting into all sorts of trouble. Tony and Ziva then have to deal with not only protecting their child from external threats but also from the child's own curiosity which could put them in danger.
One possibility could be that it would completely change their dynamic at work. They might become more protective of each other and start to think about their future outside of NCIS. For example, Tony might become more serious and start thinking about settling down in a more permanent way. Ziva, on the other hand, might struggle with how being pregnant would affect her role as an agent.
In this fanfiction scenario, Ziva's pregnancy could also be a way to explore her character further. She has always been tough and independent, but now she has to deal with the physical and emotional changes of pregnancy. It could show a more vulnerable side of her. And Tony would be there to support her, which could lead to some really heartfelt moments between them. Also, the other NCIS team members would have to adjust to this new situation, and that could create some interesting storylines too.
One possible storyline could be that Tony and Ziva decide to raise the baby while still being involved in NCIS cases. They might struggle to balance their dangerous jobs with parenthood, like having to take the baby to the office at times in emergencies. There could also be a lot of cute moments where the NCIS team acts as aunts and uncles to the baby.
One common theme is the unspoken attraction between them. In many fanfictions, they have feelings for each other but are hesitant to admit it. Another theme is the partnership aspect, how they work together as a great team and that eventually leads to a deeper connection. And of course, the theme of trust, as they learn to trust each other more and more in different storylines.
Love and romance are very common. Fans like to explore the relationship between Tony and Ziva more deeply. Another theme is adventure. They might write about Tony and Ziva going on secret missions that weren't shown in the original show.
Perhaps in the fanfiction, Ziva is kidnapped because she has some crucial information that a rogue agent wants. The NCIS team initially has no leads, but Tony, using his intuition, starts to piece together some small details that lead them in the right direction. They find out that Ziva is being held in a remote location, guarded by heavily armed men. The team has to plan a stealthy rescue operation, and in the end, they succeed in getting Ziva back safely, and she helps them take down the rogue agent.