A plot twist could be that the pregnancy is not what it seems. It might be an illusion created by a third party who wants to stir up trouble between Naraku and Kagome. This would lead to a lot of misunderstandings and heartache for both of them as they initially believe that they are about to become parents, but then discover the truth.
Perhaps the pregnancy is a sign of a prophecy. In the fanfiction, it could be that there is an old prophecy stating that a union between Naraku and a pure - hearted one like Kagome would result in a child that will either bring great destruction or salvation. This would create a lot of tension as different factions in the story would either try to protect or destroy Kagome and her unborn child.
One possible plot twist could be that the pregnancy is a result of some dark magic manipulation by Naraku. Maybe he had a hidden agenda all along and used some ancient spell to impregnate Kagome. This would lead to a great internal conflict within Kagome as she has to deal with being pregnant with the child of her enemy.
A plot twist could be that the pregnancy was a result of some sort of magical interference. Maybe a powerful enemy cast a spell on them that made Kagome pregnant, and they have to find a way to break the spell without harming the baby. Or, it could be that Kagome's pregnancy reveals secrets about her family's past that she never knew. This could lead to her having to make difficult choices about whether to continue with the pregnancy or not, all while Bankotsu is trying to support her through this difficult time.
The plot could twist when they find out that Kagome's pregnancy is progressing at an abnormally fast rate. This could be due to her connection to the feudal era and the different time - related magic there. It might also be that the baby has some special powers that are causing this rapid development. Additionally, there could be a plot twist where Koga's pack has different reactions to the pregnancy. Some might see it as a sign of weakness, while others see it as a new beginning for the pack.
One possible plot twist could be that Kagome's pregnancy is not a normal one. Maybe there are some demonic elements involved due to Inuyasha's half - demon nature. For example, the baby might have some special powers that are not typical for a human - demon hybrid. This could lead to various challenges as they try to protect the unborn child from those who might want to use its power for their own gain.
A possible plot could be that Naraku somehow manages to capture Kagome and tries to use her to gain more power. But in the process, there are some unexpected emotional developments between them. However, this is a very different take from the original Inuyasha story where their relationship is mainly one of enmity.
One possible plot twist could be that Lorelai initially tries to hide her pregnancy from her family and friends. She might be afraid of their reactions, especially if she's not in a stable situation. For example, if she's a young woman still in school or just starting out in her career, the pregnancy could be a huge disruption.
Perhaps a plot twist could be that one of them has a hidden health issue that endangers the pregnancy. This could lead to a series of difficult decisions and emotional turmoil. For example, they might have to choose between a risky medical procedure to save the pregnancy or ensure the health of the other person.
Well, perhaps there's a plot twist where the pregnancy was actually a ruse. Someone might be using it to manipulate Kenzi and Dyson for their own gain. It could be an enemy who wants to get them distracted from something important. Or it could be that the pregnancy is a result of a prophecy that they were not aware of, and suddenly they find themselves in the middle of a much larger and more dangerous situation than they expected.
Maybe Tessa discovers she has a rare condition during the pregnancy that makes it very high - risk. Ryan then has to step up and deal with all the stress while also trying to support Tessa emotionally. This could lead to some really heart - warming and also tense moments in the fanfiction.
One possible plot twist could be that they initially thought they were having one baby, but during an ultrasound, they discover it's twins. This would add a whole new layer of excitement and also more challenges for them to prepare for. Another could be that Jeanette has some health issues during the pregnancy, which makes Simon step up in ways he hadn't expected, strengthening their relationship. And a third plot twist could be that they find out at a late stage that the baby has a special condition, and they have to quickly come to terms with it and figure out how to best support their future child.
One possible plot twist could be that the pregnancy is not as straightforward as it seems. Maybe there are some magical or otherworldly elements affecting the baby's development. For example, an ancient curse might be influencing the unborn child.