Well, in a 'klaus and elena fall in love fanfiction', perhaps Elena is in a difficult situation where Klaus is the only one who can help her. He does so reluctantly at first, but during the process, they discover they have a lot in common. Their shared experiences, like dealing with loss in their own ways, bring them closer and love blossoms.
In this type of fanfiction, it could start with Klaus being intrigued by Elena's unique beauty and her unwavering loyalty to her friends. He tries to get closer to her in a rather sly way at first. Elena is initially resistant but as she gets to know Klaus better, she realizes that he has a complex personality. His art, his dreams, and his hidden vulnerabilities start to attract her, and slowly but surely, they fall for each other.
One possible plot could be that Kol and Elena meet by chance in a place outside of Mystic Falls. They initially clash due to their different personalities and pasts. Kol is intrigued by Elena's tenacity and her kind heart despite all she has been through. As they are forced to spend more time together, perhaps because of a common threat, they start to understand each other better. Elena begins to see Kol not just as one of the bad guys but as someone with his own complex story. Their love could develop gradually as they share their secrets and fears, and finally, they realize they are in love.
Well, one possible plot could be that Klaus and Elena initially have a very tumultuous relationship. Maybe they are forced to work together against a common enemy and during that time, their feelings change. Klaus might become more protective of Elena, and this newfound closeness leads to her getting pregnant. It could then explore how they deal with the pregnancy in a world full of supernatural drama and danger.
Realistically, it would develop slowly. Klaus and Elena would have to overcome their initial differences. For example, Klaus's violent past and Elena's fear of him would need to be addressed. They might start by sharing small secrets, like Klaus telling Elena about a childhood memory that made him who he is today, and Elena sharing her fears about the future. This would build trust between them.
One possible plot twist could be that the pregnancy is part of a prophecy. Maybe there's an ancient prophecy that states a child born from Klaus and Elena will either bring great destruction or be the key to saving the supernatural world. This would add a layer of mystery and danger to the story.
Well, one possibility is that Elena's friends would immediately start a search party. Damon, for instance, would be furious and stop at nothing to find her. He might enlist the help of Stefan and Bonnie. They could use Bonnie's magic to try and track Klaus' whereabouts.
The other vampires in Mystic Falls who are against the idea of a hybrid - vampire baby could be antagonists. They might see it as a threat to their way of life.
I'm not sure if there is a specifically highly recommended 'Klaus and Elena make love' fanfiction. Fanfiction can vary greatly in quality and content. You might want to check on popular fanfiction websites like Archive of Our Own and search for such stories. However, it's important to note that some fanfictions may not adhere to the original spirit of the characters or may have content that not everyone will be comfortable with.
One possible Klaus and Elena love story fanfiction could be that after many battles and misunderstandings, Klaus realizes Elena's strength and kindness. He starts to protect her secretly. Elena, initially afraid of Klaus, gradually discovers his vulnerable side. They meet one night under a full moon, and Klaus confesses his feelings. Elena is hesitant at first but then gives in to the unexpected connection between them.
One interesting plot point could be Damon's struggle to change his old ways for Elena. He has a dark past, and trying to be worthy of her love makes for a great story arc. Another could be how Elena deals with her feelings for Damon while still having a connection to Stefan. Maybe in the fanfiction, there are some supernatural events that test their love, like a powerful enemy that tries to drive them apart by using their insecurities about their relationship.
One idea could be that Elena discovers she's pregnant and tries to keep it a secret from Klaus at first. But as the pregnancy progresses, she realizes she needs his help. Another could be that Klaus is initially angry but then becomes protective. Maybe there are threats from other supernatural beings because of the baby's unique heritage.