Yes, there are quite a few. You can check out websites like Archive of Our Own. Just search for 'Azula cares about Zuko' in the search bar and you'll find a variety of stories exploring their relationship in different ways.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions, and you can easily search for this specific theme. Another option could be FanFiction.net, although AO3 generally has a more diverse and inclusive range of works.
The relationship would change drastically. Before the pregnancy, they were often at odds. But now, they are bound by this new situation. Zuko would probably be more involved in Azula's life, and Azula might start to trust Zuko more. They would have to communicate better to deal with the upcoming challenges of having a baby, like preparing a nursery, choosing a name, and dealing with the reactions of their family and the court.
A theme that frequently appears is the power dynamic. Azula is a very powerful bender, and Zuko has his own journey of becoming strong. How this power dynamic affects their relationship is often explored in fanfictions. Also, the idea of forbidden love is there. Given their family situation and the events in the show, their love might be seen as something that goes against the norms, which adds an element of drama.
Yes, there are likely some. While the idea of Zuko and Azula kissing might seem a bit odd considering their complex relationship in the original series. But in fanfiction, some authors might explore an alternate universe where they have a different kind of relationship. Some fanfictions could be more about emotional reconciliation and a moment of closeness that could be misconstrued as a kiss but is really about family - like love and understanding.
Well, 'lemon' fanfiction usually contains inappropriate content. But if you're interested in Azula and Zuko - related fanfiction that is appropriate, there are stories that focus on their complex family dynamic. For example, some fanfictions explore how they deal with their father's influence and their own paths to redemption or power. You can search for these types of stories on fanfiction platforms by using relevant tags like 'Azula', 'Zuko', 'family relationship' etc.
One possible plotline could be an alternate universe where Zuko and Azula were raised differently. Maybe they were closer as siblings and a kiss could be a sign of their deep bond. Another could be a story where Azula has a change of heart after her fall from grace and she and Zuko share a moment of reconciliation that involves a kiss as a symbol of forgiveness.
Yes, there are likely some family - friendly 'zuko and azula married fanfiction' out there. Some authors might explore a more platonic or reformed relationship between them that doesn't involve inappropriate content. They could be married in a political or reconciliatory context in these stories.
One possible storyline could be that Zuko and Azula, despite their tumultuous past, find a way to reconcile during their pregnancies. They could start to understand each other's struggles more deeply. For example, they might bond over the shared experience of impending motherhood/fatherhood and the responsibility it brings. They could also face challenges together, like dealing with the political implications of their pregnancies in the Fire Nation. Another idea is that their pregnancies could be a catalyst for change in the Fire Nation's view on family and succession.
One plotline could be about them rebuilding the Fire Nation together after their marriage. They use their combined skills and knowledge to bring prosperity and peace to their land.