It's highly probable. The Glee fandom is quite large and creative. Writers might be interested in exploring a storyline where Marley is pregnant as it can add a new dimension to her character. To find it, use relevant search terms like 'Glee Marley pregnant fanfiction' on search engines dedicated to fan works, and don't forget to check the tags and categories on those platforms.
One great fanfiction about Puck and Rachel being pregnant in Glee could be 'A New Beginning'. It focuses on how they deal with the unexpected pregnancy and the reactions from their friends and families. They face challenges like school and their future dreams, but also find a new level of closeness through it all.
One possible fanfiction could be about how Rachel deals with her pregnancy while still trying to pursue her dreams in the Glee club. Maybe she has to balance rehearsals and performances with doctor appointments and the physical changes she's going through.
One possible fanfiction could be about Santana's journey through pregnancy while still being part of the Glee club. Maybe she has to deal with the reactions of her friends and family. Some might be overjoyed, while others could be worried about how it will affect her singing and her place in the club.
Another option could be Jesse. Their relationship was also quite intense. Jesse has his own ambitions in the world of performing arts, and a pregnancy with Rachel would create a huge conflict for him. He might be torn between his love for Rachel and his career goals, and this could lead to some really dramatic storylines in the fanfiction.
One possible storyline could be how Rachel copes with her pregnancy while still trying to pursue her dreams on the Glee club. Maybe she has to deal with the reactions of her friends and family, like Finn's reaction if he's still in the picture. She might also face challenges from school authorities who might have concerns about a pregnant student being part of the Glee club.
I'm not entirely sure if there is a specific fanfiction with exactly that plot. 'Glee' has a large fanfiction community, and they come up with all sorts of ideas. It's possible that someone has written a story where Rachel is pregnant by Mr. Schuester, but it also might not exist. You could try searching on fanfiction websites to find out for sure.
One popular glee pregnant fanfiction might involve Quinn's journey through her pregnancy in a more in - depth and emotional way than shown in the show. It could explore her fears, hopes and how the other Glee club members support her.
The plot could involve Santana hiding her pregnancy at first from most of the Glee club members. She's afraid of the judgment and how it might change things. But as her pregnancy progresses, it becomes harder to hide. Her friends start to notice the changes in her behavior and body. Eventually, she has to come clean, and they all rally around her to support her through the pregnancy.
Well, it would surely change her relationship with Finn. If he's the father, they might have to grow up really fast and deal with adult responsibilities. Their relationship could become more serious and they'd have to support each other through the pregnancy. With her friends in the Glee club, like Kurt, he might be super protective and offer fashion advice for maternity wear. Mercedes could be there to give her emotional support and advice on how to stay strong during the pregnancy.