I'm not aware of any such fanfic. Fanfiction should generally abide by ethical and respectful standards, and creating or promoting content with inappropriate themes is not acceptable.
One event could be that a new character has entered her life. This new person might have different views on Christmas and is influencing Lucy Pinder's character to celebrate it in a new way. So, instead of the old - fashioned Christmas she was used to, things are changing.
Maybe it's because Lucy Pinder's character in the fanfic has some changes in her life. For example, she might have moved away from the usual Christmas setting, like a small town to a big city. This change of location can make Christmas feel different as she's not surrounded by the familiar people and traditions she used to have.
To develop Lucy's child character, start with their magic. If they inherit celestial spirit magic, show how they learn to summon and communicate with the spirits. Also, consider their personality. They could be brave like Natsu, or more calm and collected like Gray. Their relationships are important too. How they interact with the older Fairy Tail members can shape their character. For example, if they look up to Erza, they might learn about discipline from her.
It could be a heroic character she meets during her quest. Maybe a powerful wizard or a brave knight who has a brief but intense encounter with Lucy, leading to her pregnancy.
You could use graphic design software like Adobe Photoshop. Open the comic image and the child's photo, then layer and resize the child's photo to fit on the comic front.
Well, you could start by finding a high-quality digital version of the Marvel comic front and the child's photo. Import both into an image manipulation app. Use tools like masks and opacity settings to place the child's photo smoothly on the comic. Also, pay attention to lighting and color matching for a realistic effect.
You can start by choosing a suitable Marvel comic template. Then, use photo editing software to blend the child's photo seamlessly onto the template. Adjust the colors and effects to make it look comic-like.