Elena would be devastated when Damon leaves her pregnant. She has always had a complex relationship with him, and this would be a huge blow. She might isolate herself at first, not wanting to share her situation with others. But as the pregnancy progresses, she would start to realize that she has to be strong for the baby. She would draw on her inner strength and the memories of the good times she had with Damon to find the courage to face the challenges ahead. She might also experience moments of hope, thinking that Damon could come back someday, but she would not let that hope consume her and would instead focus on building a life for herself and her child.
Their relationship becomes more serious and committed. With a baby on the way, they have to think about more than just themselves.
Elena would probably be terrified at first. She's a human in a world full of powerful supernatural beings. Being kidnapped by Damon would mean she's in a very vulnerable position. She might initially try to fight back or escape, using any opportunity that presents itself.
Their relationship would likely become more serious and committed. With a baby on the way, they'd have to think about the future more. Damon might become more protective of Elena.
Stefan would be extremely worried and angry. As Elena's other love interest, he has a deep connection with her. He would immediately start looking for her, using all his vampire skills and resources. He would probably suspect Damon right away, given their history of rivalry over Elena.
Love and family are common themes. Their love for each other deepens as they anticipate the arrival of their baby. Family also plays a big role as they think about how their families will react and how they will create a new family unit.
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.
The pregnancy can strengthen their relationship. They become more united as they face the challenges together. They have to rely on each other more, like Damon protecting Elena from any harm during her pregnancy and Elena relying on Damon for emotional support.
Elena might be heartbroken. She probably expected Damon to always be there for her, so his choice of Bonnie would come as a shock.
One popular storyline could be how they deal with the challenges of being new parents in a world full of supernatural threats. For example, they might have to protect their unborn child from other vampires or werewolves who see the baby as a threat or a valuable asset. Another could be the emotional journey they go through, like Damon's fear of being a bad father due to his past, and Elena's determination to make their family work. There could also be a storyline where they discover unique powers that their child might have, which adds an element of mystery and adventure to the fanfiction.
Yes, there are likely many Vampire Diaries fanfics out there where Elena and Damon are pregnant. Fanfiction writers often explore different 'what - if' scenarios in the Vampire Diaries universe, and the idea of Elena and Damon having a child is an interesting concept for many fans to write about. You can find such fanfics on various fanfiction websites like Archive of Our Own or FanFiction.net.