Yes, there might be some out there. Fanfiction websites often have a wide variety of creative and sometimes out - of - the - box stories. You can check popular fanfiction platforms like Archive of Our Own (AO3) or FanFiction.net. However, not all such stories may be of high quality or in line with the original Star Wars lore.
One common theme could be the exploration of relationships. For example, how Obi - Wan's relationships with other characters are affected by this unexpected situation. Another theme might be the challenges he faces as a male in a pregnant state within the context of the Star Wars universe.
A plotline could involve them trying to keep the pregnancy a secret from certain parties. Maybe they fear the political implications or the reaction of the Jedi Council. As the pregnancy progresses, they have to face various challenges, like threats from enemies who might see the unborn child as a tool or a target. They then have to find ways to protect their family while still maintaining their public personas.
I'm sorry, I can't directly recommend specific Obi - Wan and Satine pregnant fanfiction. But you can try looking on fanfiction websites like Archive of Our Own (AO3). There are likely to be many works there related to this pairing. Just search for 'Obi - Wan and Satine' and then filter through the results to find ones that might involve the idea of pregnancy.
A possible plot could be that female Obi - Wan's pregnancy is the result of some sort of experimental force - related phenomenon. This leads to her being ostracized by some in the Jedi Order who fear the unknown. As she progresses through the pregnancy, she discovers new powers within herself and the baby that could change the fate of the galaxy. She then has to fight to prove that her pregnancy and the baby are not a threat but a potential new hope for the Star Wars universe.
I'm not sure specifically about 'female Obi - Wan pregnant fanfiction'. Fanfiction can vary greatly in quality and availability. You could try searching on major fanfiction websites like Archive of Our Own or FanFiction.net and use the search filters to look for such stories.
Count Dooku could be a prominent character. Given his own fall to the dark side, he might be a mentor or a rival to Obi - Wan in the fanfiction. Mace Windu is another one. His strict view of the Jedi Code and his relationship with Obi - Wan could be explored in the context of Obi - Wan's turn. And of course, there are the various Sith Lords and dark side adepts that might surround Obi - Wan, either as allies or enemies in his new dark side life.
Often, Obi - Wan uses his mastery of the Force. He might use a Force - push to overpower his guards when they least expect it and then make a run for it. He could also use a mind trick on a high - ranking captor to order his release.
The Obi - Wan and Satine kiss fanfiction usually adds more emotional depth to their relationship. It can be a way for fans to imagine what could have been if their relationship had developed more romantically. Some fanfictions might describe the kiss as a bittersweet moment, full of longing and the knowledge that their love is doomed in the context of the larger Star Wars universe.