One great Damon and Katherine love fanfiction is 'Eternal Bond' which delves deep into their complex relationship. It shows how their love is intertwined with power struggles and dark secrets.
Another author could be RoseRed. She often writes fanfictions that are full of action and adventure. In her Damon and Katherine baby fanfictions, she might create exciting plotlines where the baby is in the middle of some dangerous vampire battles. Her stories are fast - paced and keep you on the edge of your seat.
Their relationship would likely become more intense. With a baby on the way, there's a new level of commitment. Damon might become more tender and less reckless, as he now has Elena and the unborn child to think about. Elena would probably rely on Damon more, trusting him to protect her and their future family.
Archive of Our Own (AO3) is also a great place to look for such fanfictions. There are numerous well - written stories there that explore the Damon - Katherine relationship from different angles. It has a good search function which allows you to filter the stories based on various criteria like rating, word count etc.
There might be a fanfiction where Damon and Katherine's baby is raised in a different era. For example, the baby is sent forward in time and grows up in a modern world. This would lead to a lot of culture shock and interesting interactions as the baby, now grown, tries to understand its vampire heritage while adapting to the new world. It could also bring about a reunion with Damon and Katherine in a very unexpected way.
One common theme is the idea of forbidden love. Their relationship is complicated by the fact that they are vampires with a lot of history and baggage. Another theme is redemption. Often, Katherine is portrayed as trying to make up for her past wrongs, especially in Damon's eyes.
Caroline would likely be a mix of excited and cautious. She's a bit of a romantic at heart, so she might see the potential for a new family dynamic. However, she also knows Katherine's past and would be on guard to make sure Katherine doesn't manipulate Damon during the pregnancy. She would probably try to befriend Katherine to keep an eye on things.
One idea could be that they face challenges from the vampire and werewolf communities. Since their relationship was already complex in the show, this pregnancy could stir up more trouble. Another plot could be them trying to keep the pregnancy a secret while preparing for the arrival of the baby. They might have to deal with issues like finding a safe place to raise the child in a world full of supernatural threats.
There are fanfictions where Katherine returns from the dead in a different form, perhaps as a spirit. Damon, who has always had a deep connection with her, has to figure out how to interact with this new version of Katherine. It could involve a journey of self - discovery for Damon as he realizes that his feelings for her are more complex than he thought, even in this new and strange situation.
Katherine herself is also a great character in fanfiction. Her devious and manipulative ways add a lot of drama. In some fanfictions, her backstory is delved into more deeply, showing how she became the way she is. This can make her a more sympathetic or even more despicable character, depending on the writer's take.