Their relationship could face strain. The stress of the pregnancy, combined with the constant danger in 'Falling Skies', might lead to arguments. For example, if Hal is too overprotective or Maggie feels like Hal isn't doing enough. But at the same time, they would also have a deeper bond because of the shared experience of expecting a child.
One possible plot development could be the added pressure on the group. They would need to ensure the safety of Maggie and the unborn child in the dangerous post - apocalyptic world. This might lead to more cautious strategies and a greater focus on finding a more permanent and secure shelter. Also, it could create some emotional turmoil within the group, especially for Hal, as he would be worried about becoming a father in such a harsh environment.
One common theme is redemption. Many fanfics deal with Hal trying to redeem himself from the things he's done or been through that have caused him hurt. For example, some might focus on his actions during the alien invasion and how he can make up for them.
They might start by decorating the nursery. Hal could paint the walls while Maggie picks out the furniture. They could argue a bit over the color scheme, like Hal wanting a more neutral color and Maggie preferring something more colorful.
Nightwing and Batgirl's relationship would experience a significant transformation. Their carefree days of just being superheroes would be over. Now, they would be focused on building a family. Nightwing would become more of a caretaker, not just for Batgirl but also for their future family. There would be more tenderness between them. They might argue more too, as they face the stress of impending parenthood. For example, they could disagree on how to raise the child, whether to keep it away from the superhero life or train it to be a hero from an early age. But overall, their bond would be strengthened as they face these new challenges together.
They would likely become more protective of each other. Kurama would be constantly on guard to keep Botan and the unborn child safe. Their relationship would deepen as they share the new experience of impending parenthood. For example, they might have more tender and private moments together, away from their usual adventures.
They would become closer. The shared experience of expecting a baby would deepen their bond. Kristoff would be more tender and protective towards Anna, and Anna would rely on Kristoff more for emotional support.
One great Falling Skies Hal Hurt fanfiction is 'Hal's Struggles' on FanFiction.net. It really delves into Hal's emotional pain after his experiences in the show. The author does a wonderful job of portraying his inner turmoil.
In a pregnant fanfiction, their relationship would deepen. There would be a new level of intimacy. They would have to communicate more about their future and their hopes for the baby. Percy might become more domestic, like helping Annabeth with household tasks. And Annabeth would rely on Percy more for emotional support during the hormonal changes of pregnancy.
Jayne, who is usually rough around the edges, would have to soften up a bit. His relationship with River would transform from a somewhat distant one to a very close and interdependent one. River, with her pregnancy, would be more in tune with her emotions, and this could help Jayne open up more as well. They would start to communicate on a deeper level, sharing fears and hopes for their future and the future of their unborn child. For example, they might start having long talks at night about how they want to raise the baby, what values they want to instill, etc.
Their relationship would likely become more serious. They would have to depend on each other more. Steven would be very protective of Connie, and Connie would rely on Steven for emotional support as well as his unique abilities. For example, he could use his shield to protect her from any potential harm.