It could be Marcel. He has a long - standing relationship with the Mikaelson family, and his connection with Rebekah could deepen during her pregnancy. He might be the one to support her through the difficult times.
I really liked 'The Miracle of Rebekah's Pregnancy'. In this fanfic, it focuses on how Rebekah's pregnancy changes the dynamics within the Mikaelson family. It has some really heartwarming scenes where her siblings come to terms with the new addition to the family. It also has a great plot that keeps you hooked from start to finish.
A common theme is family. Since Rebekah is part of the Mikaelson family, her pregnancy often brings the family closer or causes some internal family drama. Another theme is the supernatural aspect. Her unborn child might have some special powers or be a target because of their family's supernatural status.
A plot could revolve around Rebekah's pregnancy being a secret at first. She tries to hide it from those who might use it against her. As the pregnancy progresses, she starts to form a bond with the unborn baby in unexpected ways. For example, she might start having dreams about the future of the child. Then, as the secret slowly starts to come out, she has to face the consequences and reactions of those around her.
One possible storyline could be that Rebekah and Marcel discover they are pregnant unexpectedly. They might initially be in shock. Rebekah could be worried about how her vampire family will react, especially considering the complex relationships within the family. Marcel, on the other hand, might be excited but also a bit fearful of the responsibilities. They could face challenges from the vampire community who may not accept a half - vampire baby. The story could then revolve around them protecting their unborn child and finding a place in the world where they can raise it in peace.
One possible plot could be that Stefan and Rebekah find themselves in an unexpected situation where they are about to have a baby. There could be a lot of drama as they deal with their families' reactions. Maybe the Mikaelsons are initially against it, while Stefan's friends are also shocked. They would have to navigate through their own relationship issues while preparing for the new life coming.
The Mikaelson family, especially Klaus, could be antagonists. He might see the pregnancy as a threat to his family's power or reputation. He could try to stop Stefan and Rebekah from being together and having the baby.
One possible plot twist could be that the pregnancy is a result of a magical spell gone wrong. Maybe a witch with a vendetta against them cast a spell that made Rebekah pregnant with Stefan's child as a way to disrupt their lives. Another could be that it's a false pregnancy caused by some dark entity preying on their fears of starting a family. This would add a lot of drama as they first deal with the shock of the pregnancy and then the realization that it might not be real.
One possible storyline could be Rebekah dealing with the challenges of being pregnant in a world full of supernatural threats. She might have to hide her pregnancy from her enemies to keep herself and the unborn child safe.
Rebekah's family has a long history of complex relationships. Her mother, if still around, might see the pregnancy as a way to strengthen their family's position in the supernatural world. However, some of her siblings like Kol might be jealous or feel left out. On Stefan's side, his vampire nature might make his family worry about the implications of having a half - vampire child. They would be concerned about how to raise a child in their world of danger and secrets.