One common theme could be secrecy and the reasons behind Kurt hiding the pregnancy. It might be due to fear of judgment from family or society within the context of the story's world.
I'm not sure where to specifically find 'Kurt hides pregnant' fanfiction. You could try searching on some well - known fanfiction websites like Archive of Our Own. They have a large collection of various fanfictions and you might be able to find something related by using relevant keywords in their search bar.
They could support him emotionally by always being there to listen. When he's feeling down or worried about the pregnancy, they offer words of comfort.
One possible plotline could be the secrecy and challenges of hiding the pregnancy. Kurt might be worried about how others will react, especially if it's in a context where pregnancy is not expected or accepted. Another could be the relationship dynamic changes as a result of the pregnancy. For example, how the relationship between Kurt and Hide evolves as they face this new situation together.
I'm not sure specifically about 'kurt hide pregnant' fanfiction. You could try searching on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. They have a wide range of fanfictions and you might be able to find what you're looking for by using relevant tags and keywords in their search functions.
Perhaps there could be a plot where the pregnant husband has a special talent or interest, like being a musician. And Blaine and Kurt have to figure out how to balance his creative pursuits with the upcoming arrival of the baby. They might also have to deal with the media or public attention if they are in a more public - facing situation.
The Supreme One had discovered that Little Orchid was pregnant. In the sixth continuation of the Canglan Art, Jie Li told Shang Que about Little Orchid's pregnancy and asked him not to tell Supreme Moon before Little Orchid returned. Otherwise, Little Orchid would cut ties with him. Shang Que agreed to Jie Li's request. However, in the seventh continuation of the Canglan Technique, Dongfang Qingcang also learned that Little Orchid was pregnant. Three months after the little orchid was pregnant, he received the good news from the doctor. Even though Little Orchid had planned to hide it from Dongfang Qingcang, he still found out. Dongfang Qingcang was happy that Little Orchid was pregnant, but he also became very protective of her. He did not let her go out and stayed by her side at all times. Thus, the little orchid didn't manage to fool the Supreme One.
Well, it could be about Cousland finding a secret place in Haven to hide from those who might harm her and her unborn child. Maybe she has to rely on the kindness of a few villagers she befriends there.
It could show that Sasuke becomes more protective of Naruto in secret. He might sense something is different about her but not be sure what. This could lead to some tense yet tender moments between them as he tries to figure it out while still respecting her privacy.
Maybe she wants to avoid causing unnecessary worry among her friends and comrades. They are often involved in dangerous missions, and if they knew she was pregnant, they might get distracted. Naruto might think it's better to keep it a secret until she figures out how to handle the situation without disrupting their important work.