Well, it could start with their decision to get married. Maybe they have to overcome some magical obstacles first, like getting approval from the fairy council or dealing with a curse that tries to stop their union. Then the story could focus on their wedding preparations, with all the fun and chaos that comes with it.
One possible plot twist could be that Sabrina discovers Puck is actually a prince from another magical realm and their marriage is a key to uniting two kingdoms. This would add a whole new layer of political intrigue to their relationship.
Well, one possibility could be that it explores how Sabrina and Puck deal with the unexpected pregnancy in a magical world full of challenges. Maybe they have to face the reactions of their families and friends, who might have different views on their relationship and the pregnancy.
I think Puck's fairy friends would be divided. Some of his more mischievous friends would be all for it, seeing it as a great opportunity to play more pranks on the mortal world through Sabrina. But his more serious fairy relatives might be concerned about the mixing of the mortal and fairy worlds through this marriage.
Another option is to check out relevant fandom forums. Fans often discuss and share their fanfictions in these places. Maybe someone has written a great story about Puck and Sabrina's marriage and shared it on a forum dedicated to that fandom.
It could be that Puck has been secretly in love with Sabrina for a long time. He might play some pranks on her as a way to get her attention. One day, Sabrina discovers Puck's true feelings by accident. She is initially shocked but then starts to see him in a new light. And then, they share a kiss. This could lead to a whole new set of adventures and challenges as they navigate their new relationship within the world of The Sisters Grimm.
A common theme is their relationship development. Since they have such different personalities, seeing how they grow closer or learn to tolerate each other is often explored. For example, Puck's pranks and Sabrina's reactions to them can lead to some interesting relationship growth.
One idea could be that they decide to get married suddenly after realizing their deep love during a trip. They face opposition from their friends at first, thinking it's too rushed. But Puck and Rachel are determined. They plan a simple yet beautiful wedding with just their closest family and friends. In the end, everyone sees how happy they are together and supports their marriage.
In this fanfiction, it could be interesting if the pregnancy is a result of some magical accident. For example, a spell gone wrong. Then they have to figure out how to handle this new situation. They might start learning about the responsibilities of parenthood together. Sabrina could be worried about how to balance her normal life with the upcoming motherhood, and Puck might be trying to figure out how to be a more responsible partner. As they progress through the pregnancy, they could learn a lot about themselves and each other.
One possible plot could be that they start off as friends with a bit of a rocky past. Maybe they decide to get married on a whim after a particularly emotional moment. Then they have to deal with the reactions of their friends and family from Glee club. Some might be supportive while others are shocked. They could go through a series of comical and heartwarming events as they plan their wedding and learn more about each other in the process.
Maybe there's a situation where Sabrina and Puck are magically swapped in abilities. Puck has to deal with Sabrina's normal life problems while Sabrina has to handle Puck's magical chaos. This could lead to some really funny and also heart - warming moments as they understand each other better.