Naruto would probably be in awe at first. He'd try to communicate with Mothra in his usual friendly and exuberant way. He might start by introducing himself and his village, just like he did with other summons. Then he'd try to understand Mothra's powers and how they can be used to help in battles or protect the village.
Regular Godzilla and Mothra stories usually focus on their battles or their roles in saving/destroying the world. But godzilla and mothra lemon fanfiction often delves into their relationship in a more personal and sometimes romantic way.
The origin of Mothra dates back to the creative minds behind the kaiju movies. Mothra is typically presented as a benevolent creature. It is born from an egg that holds great significance. Its appearance on the scene in the Godzilla universe is often a sign that there is some sort of imbalance in nature that needs to be corrected. Mothra uses its unique abilities, like its large wings for flight and the capacity to communicate in some mysterious ways, to interact with the other kaiju and the humans. It is a symbol of nature's power and a protector of the Earth, which is a central part of its origin story.
Fanfiction often gives a new perspective to their relationship. It could be that Godzilla and Mothra have a deeper connection that was not explored in the original movies. Maybe they communicate in ways that humans don't understand, and in fanfiction, writers try to explain that connection. They might also be part of a bigger ecological balance in the fictional world created by the fanfic writers.
Humans play crucial roles in Godzilla and Mothra fanfiction. They can be the ones observing and documenting the actions of these giant creatures. For instance, a scientist in the fanfic might be studying Godzilla's behavior to find a way to coexist peacefully.
He might leave to protect Kara and the unborn child. Maybe he discovers that there is some kind of danger following him that could put them in jeopardy, so he decides to sacrifice his time with them to keep them safe.
Even though Mon - El leaves, their relationship can still develop. Kara could keep a journal for the baby, writing about her feelings for Mon - El. When Mon - El returns (if he does), he could read it and realize how much Kara truly loved him. Also, Kara might have dreams or visions of Mon - El during her pregnancy, which could show that their connection is still strong on an emotional level.
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They would become more united. Having a baby together would make them a family, and they would have a stronger bond as they face the challenges of raising a child. Their relationship would be more about teamwork, not just as superheroes but also as parents.