One possibility is that they decide to keep their relationship a secret. They know that their association is complicated due to their different standings in the world. Nightwing has to uphold the law and Catwoman is a thief. But the kiss has made their feelings undeniable. So they might start meeting in secret places, sharing stolen moments together. This secrecy could add a lot of intrigue to the fanfiction, with the threat of discovery always looming over them.
The kiss in the Nightwing and Catwoman fanfiction often symbolizes a shift in their relationship. Maybe they start off as rivals, constantly at odds with each other. But as the story progresses, the kiss could be a turning point. It could be a moment of passion that catches both of them off - guard. Writers might use this moment to explore the deeper emotions of the characters, like Nightwing's struggle between his sense of justice and his new - found feelings for Catwoman, or Catwoman's conflict between her criminal nature and her attraction to Nightwing.
It can symbolize protection. Batman is the mentor, and when he carries Nightwing, it shows his instinct to keep Nightwing safe from harm, whether it's physical harm from villains or other threats.
One possible fanfic could involve a battle against a powerful villain. Nightwing might get injured while trying to protect Gotham. Batman then has to step in not only to defeat the villain but also to take care of Nightwing. He could use his advanced medical knowledge and resources in the Batcave to nurse Nightwing back to health.
A way to develop their relationship in this type of fanfiction is through joint parenting. They might have different approaches to raising their kids. Batman could be very strict about discipline and training, while Catwoman might be more lenient and focus on teaching the kids about the importance of freedom. Through these differences, they learn to understand each other better and grow closer as a couple. Also, they could face external threats to their family which forces them to rely on each other more, strengthening their bond.
One scenario in the fanfiction could be that Batman gets jealous when he sees Catwoman flirting with a rich businessman during one of her heists. He might start to question her motives and their relationship. This jealousy could cause him to act out of character, perhaps being more aggressive or possessive towards Catwoman than he normally would be. And Catwoman, being the independent character she is, would not take kindly to this sudden change in Batman's behavior, leading to a rift between them that would be interesting to explore in the story.
She might be very surprised at first. After all, Batman is not one to show his emotions so openly. But then she would likely be overjoyed. She has deep feelings for Batman too, and this proposal would be a confirmation of their complex relationship.
The Penguin often makes an appearance. He can add an extra layer of chaos and villainy to the story. His devious plans can either get in the way of Batman and Catwoman's relationship or be a catalyst for them to work together more closely.
Well, it is indeed a classic. Catwoman and Batman's love story is not your typical love story. They come from different worlds. Batman is the Dark Knight, dedicated to justice, while Catwoman is a cat burglar. But their attraction to each other is undeniable. Their love is often a struggle, as they have to deal with their own moral compasses and the expectations of Gotham. This makes their love story one of the most interesting and enduring in the Batman franchise.
A scenario could be that Batman gets injured badly during a fight. Catwoman has to take care of him and in the process, she sees a more vulnerable side of him. This makes her realize that he's not just a symbol, but a man. Batman, on the other hand, sees her kindness and realizes that she has more depth than he initially thought. This changes their dynamic, with Batman being more open to her ideas and Catwoman being more committed to helping him in his mission.