Their relationship could develop through shared danger. For example, when they are in a fight against a horde of demons in the City of Bones, they rely on each other's skills. Jace's combat expertise and Clary's ability to see things others can't work in tandem, and this mutual dependence could bring them closer.
The kiss can strengthen their relationship immediately. It can make them more protective of each other. For example, Jace might become even more determined to keep Clary safe after the kiss, seeing her not just as someone he has to protect because of the mission, but as someone he truly loves.
In a fanfiction, their kiss could be a turning point in their relationship. Maybe they had been denying their feelings for a long time, but this kiss shatters all the barriers. It could happen in a secret, magical place within the City of Bones. The setting would add to the allure of the moment. Clary might be the one to initiate the kiss, surprising Jace, and from that moment on, their relationship takes a new direction, filled with more love and understanding.
Their relationship would become more centered around the baby. They would have to make decisions together for the sake of their child, which would strengthen their bond.
It would change in many ways. They would go from being carefree high school sweethearts to having a lot of responsibilities. There would be more arguments as the stress of the situation builds up. But at the same time, they would also have deeper moments of love and understanding as they face this huge life change together. Jace might become more overprotective of Clary, and Clary would need Jace's support both emotionally and physically.
After the kiss, their relationship might become more public. They could start to be more open about their feelings in front of their friends and allies. For example, they might hold hands more often or give each other knowing looks in group settings.
One interesting plot idea could be Jace and Clary going on a secret mission within the City of Bones. They could discover a hidden chamber that holds the key to a long - forgotten Shadowhunter power. Another could be them facing a new and powerful demon that specifically targets their relationship, forcing them to rely on their bond more than ever.
They could start by looking at some well - known fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfiction for various fandoms, including the City of Bones. There are likely to be many high - quality stories there, sorted by different categories such as genre, rating, and relationship focus.
The kisses often mark important turning points. The first kiss can be the start of their realization of deeper feelings. It might make them more protective of each other, like Jace becoming even more determined to keep Clary safe after that first kiss.
One scenario could be that their kiss is a moment of realization. In the midst of all the chaos in the City of Bones, their kiss is like a sudden burst of clarity. They've been through so much together, and this kiss is the culmination of all the unspoken feelings. It could be a very passionate kiss, filled with all the pent - up emotions from their adventures and the danger they've faced.
The relationship would evolve significantly. Before the baby, they were mainly focused on their own adventures and relationship. But now, they are parents. They would need to support each other in different ways. For instance, Jace might be more protective of Clary and the baby. Clary would be more nurturing, and they would both have to learn to balance their duties as Shadowhunters with their new family life.