One possible plotline could be how Gibbs and Hollis deal with the news of the pregnancy. Maybe Gibbs is initially shocked but then becomes very protective. Another could be about the challenges they face during the pregnancy, like Hollis having to balance her work and the pregnancy.
There are so many fanfictions out there, and it's hard to pinpoint just the ones about Gibbs and Hollis Mann being pregnant. However, you could start by using advanced search options on the big fanfiction platforms. For example, on Archive of Our Own, you can search for the characters' names and then narrow it down by adding keywords like 'pregnant'. This way, you might be able to find what you're looking for.
The fanfiction could also explore the challenges they face during the pregnancy. Jenny might be worried about how her pregnancy will affect her career, while Gibbs could be concerned about providing a safe environment for the baby. They could have discussions about their future as parents and how to balance their work and family life.
One possible plot could be that Gibbs and Ziva are in a secret relationship. When Ziva discovers she's pregnant, she's initially terrified. Gibbs, on the other hand, is surprisingly calm and determined to support her. They face many challenges, like hiding the pregnancy from their colleagues at first. Gibbs starts to make small changes in their work environment to ensure Ziva's safety and comfort.
A great way to develop the story is through dialogue. Have them talk about their hopes and fears for the baby. Also, describe the physical and emotional changes Jenny goes through during the pregnancy. This will make the story more realistic and engaging.
They could face difficulties with their respective families. Ziva's family might have strong opinions about the pregnancy, and Gibbs' family (if we consider his past family life) could also be a factor. They would need to navigate through these family issues while also dealing with their own feelings about becoming parents.
In this fanfiction, perhaps there could be a storyline where their pregnancy is a secret at first within the NCIS team. Gibbs and Ziva try to keep their normal routine while dealing with the physical and emotional changes that come with pregnancy. There could be some comical moments, like when Ziva has cravings during a case and Gibbs has to quickly find what she wants.
Once upon a time, Gibbs and Tony decided to tie the knot. Their wedding was a small, intimate affair. After the marriage, they were overjoyed when they found out that Tony was pregnant. Gibbs became extremely protective, always making sure Tony had everything he needed. He would cook his favorite meals and they would spend evenings talking about their future as parents.
Their relationship would likely become more intimate on an emotional level. Gibbs would probably be more open and tender towards Abby, seeing her in a new light as a mother - to - be.