In some fanfictions, they might kiss during a time of danger. They think they might not survive the upcoming threat, and in that moment of vulnerability and shared fear, they come together in a passionate kiss. It's a way of expressing all the unspoken feelings they have for each other, as if this might be their last chance to do so.
One plot idea could be that they are separated during a battle in Narnia. When they are reunited, the relief and joy lead to a passionate kiss. This kiss could symbolize their new - found determination to never be parted again and fight side by side.
One possible plotline could be that Lucy and Caspian are newly married and the pregnancy is a surprise. They then have to deal with the political implications in Narnia as well as their own personal fears and joys. Another could be that they face some sort of danger during the pregnancy, like an enemy threat that endangers Lucy and the unborn child.
One possible scenario could be after a dangerous battle. They've just narrowly escaped death, and in the heat of the moment, with adrenaline still coursing through their veins, Natsu impulsively leans in and kisses Lucy. It's a quick, passionate kiss that catches Lucy off - guard but she soon reciprocates as she realizes her true feelings for him in that intense moment.
One popular fanfiction site is Archive of Our Own (AO3). You can search for 'Caspian and Lucy kiss' there and likely find a variety of stories. Some might be romantic adventures where they share a kiss during a dangerous quest in Narnia, adding a touch of passion to their already deep friendship.
Perhaps in the fanfiction, they kiss at a grand ball. Lucy is dressed in a beautiful gown and Wyatt can't resist her charm. It's a very romantic and fairytale - like moment. They might be surrounded by other characters who are either shocked or happy for them.
The kiss can deepen their relationship immediately. It's like a turning point where they both realize their feelings are more than just friendship. After the kiss, they might start to be more protective of each other and more open about their emotions.
One popular scenario could be after a major battle where they both realize their deep feelings for each other. Natsu, being the impulsive and passionate character he is, might just grab Lucy and plant a kiss on her. Another could be in a moment of great celebration in the guild. With everyone around them having a great time, Natsu and Lucy get caught up in the moment and share a kiss. And sometimes, it might be in a more private, tender moment. Maybe Lucy is feeling down, and Natsu tries to comfort her in a more intimate way, leading to a kiss.
One possible scenario could be that after a great battle, Jorah saves Daenerys from a near - death situation. In the heat of the moment, with their emotions running high, they share a passionate kiss. It's a moment of relief and realization of their deep - seated feelings for each other.
One possible scenario could be that they share a kiss during a moment of victory. After Donnie and April successfully defeat a powerful enemy together, in the heat of the moment, their emotions run high and they kiss.
Another scenario could be a confession of love. Destiny writes a letter to Matthew expressing her feelings but is too shy to give it to him directly. By chance, Matthew finds the letter. He then seeks out Destiny, and when he finds her, he simply kisses her to show that he feels the same way.