One common theme is sacrifice. Either Castle or Beckett may sacrifice their relationship for the greater good, like protecting the other from a dangerous situation. Another theme is the power of love. Despite being forced apart, their love still endures and is often the driving force that eventually brings them back together.
The theme of redemption can also be present. If there was a mistake or misunderstanding that led to their separation, one or both characters may go through a journey of redemption to fix what went wrong. For example, if Castle was wrongly accused of something, he would strive to clear his name not only for himself but also for his relationship with Beckett.
One possible reason for Castle and Beckett to be forced apart in fanfic could be external threats. For example, a powerful criminal organization might target Beckett because of her work, and to keep Castle safe, they are forced to separate. Another reason could be a misunderstanding. Maybe a false lead makes Beckett think Castle has betrayed her in some way, leading to their separation. Fanfic writers often use such plot devices to create drama and tension in the story.
Love and acceptance is also a prevalent theme. Since Beckett comes into Castle's life and becomes part of Alexis's world, fanfics may focus on how they all learn to love and accept each other fully. This could involve storylines where there are initial misunderstandings but eventually they come to a place of complete acceptance and harmony in their relationships.
One common theme could be the deepening of their relationship. Given the 'rated M' aspect, it might explore the more passionate and physical side of their connection.
A prevalent theme is the balance between their professional and personal lives. They have to figure out how to be great detectives while also being present and loving parents. This creates a lot of interesting plotlines in the fanfiction. Sometimes they struggle with leaving the baby to go on a case, or they bring the baby - related chaos into their work environment in a humorous way.
A Castle and Beckett baby fanfic could be about their journey into parenthood. It might explore how they adjust to having a baby in their lives. For example, Castle could be super excited and start writing new stories inspired by his new family experience, while Beckett might be a bit more cautious and protective.
One common theme is physical injury. For example, Beckett might get hurt during a case, and Castle has to deal with his worry and protect her. Another theme is emotional hurt, like when they have a misunderstanding or an argument that causes pain to their relationship.
One common theme is how Castle and Beckett deal with the impending arrival of their baby. It might explore their fears, joys, and the changes in their relationship. For example, Castle might be over - the - moon excited while Beckett could be more worried about how it will affect her career.
One common theme could be the anticipation and excitement of new life. The story might focus on how Beckett and Castle prepare for the baby, like decorating the nursery or choosing names. Another theme could be the challenges they face during the pregnancy, such as health scares or adjusting to the idea of becoming parents. It could also explore how their relationship evolves during this time, growing deeper as they share this special experience.
There are many alternatives. For example, a fanfic could be about Beckett and Castle solving a mystery together in a new and exciting location. Or it could focus on their relationship growing through mutual understanding and shared hobbies. Another alternative could be a story where they have to work together to save a friend or family member from a dangerous situation without any inappropriate or unethical plot elements.
I'm not sure if there is such a fanfic that is both appropriate and well - written. Fanfics can vary greatly in quality and content. However, the idea of using such a disturbing and non - consensual scenario in a fanfic is not ethical in general. Most good fanfics focus on positive character development, interesting plotlines that are in line with the spirit of the original show, and healthy relationships.