Yes, there are quite a few. You can check out fanfiction.net or Archive of Our Own. Just search for 'Luke Mara Jade romance' and you'll find a variety of stories with different takes on their relationship.
One common theme is the power of love and how it can change and redeem. Their relationship often shows how two very different people can come together and grow. For example, in many fics, Luke's Jedi beliefs and Mara's more independent nature at first clash but then blend.
Character growth is another major element. Mara Jade might start off as a bit of a mystery, and through her interactions with Luke, she evolves. Luke, too, may change as he gets closer to Mara, learning new things about himself and the Force, as seen in some fan fictions where he discovers new aspects of the Force through her influence.
The characters themselves are very popular in the Star Wars fandom. Fans love to explore the romantic side of their relationships that wasn't fully explored in the official canon.
There's a fanfic called 'Jade's Legacy' which is quite interesting. In it, Mara Jade and Luke Skywalker face a new threat that forces them to rely on their unique bond. It has some really exciting action scenes and also explores their emotional connection in depth.
One great Mara Jade - Luke Skywalker fan fiction is 'Heir to the Empire' series. It really delves into their relationship in an interesting way, with great character development and a captivating plot that keeps you hooked. The way it weaves their individual stories together is quite remarkable.
There are some fanfictions that might explore such a scenario. However, it depends on different authors' creativity and the specific plotlines they develop. Some fanfic writers might be interested in exploring the relationship between Mara Jade and Luke Skywalker in such a context, but it's not a mainstream or canon storyline in the official Star Wars universe.
One common theme is redemption. Often, Mara Jade has a past that she needs to come to terms with, and Luke is sometimes part of that journey of self - discovery and redemption for her. Another theme is love against all odds. Since they come from different backgrounds, with Mara initially being an assassin, their relationship has to overcome many obstacles.
One possible plot could be them going into hiding to protect the unborn child from their enemies. Since they are both important figures in the Star Wars universe, there would be many who might want to harm the child for various reasons, like power or revenge.
One great Luke and Mara fan fiction is 'Heir to the Empire' series. It delves deep into their relationship, with Mara initially being an adversary to Luke. The story unfolds as they gradually understand each other more. The character development is well - written, and it shows how their relationship evolves over time in the face of various challenges.