The relationship would likely become more intense. They would have to rely on each other more, and their bond would deepen as they are about to become parents. Inuyasha would probably become more protective of Kagome.
Another interesting one is 'Inuyasha and Kagome: Domestic Bliss'. This story delves deep into the daily life of the married couple. It shows how Kagome tries to introduce some of her modern ideas into their home, like new cooking methods or ways of organizing things. Inuyasha is initially a bit resistant but then comes to appreciate these new things. It's a really cute and relatable take on their married life.
There could be a fanfic that delves into their backstories more. For instance, exploring Sango's past as a demon slayer in greater detail. How she overcame her family's tragedies and how that has shaped her. Inuyasha and Kagome could be part of this exploration, learning more about Sango and in turn, Sango learning more about their own complex pasts and how they are dealing with it.
He might also become more patient. Usually a bit hot - headed, but with Kagome pregnant, he'd have to learn to be more calm and understanding. For example, when Kagome has mood swings due to hormonal changes, Inuyasha would have to control his temper and be more supportive instead of getting frustrated.
There are many fanfictions in the 'Inuyasha' fandom, but a story where Inuyasha kills Kagome goes against the general nature of their relationship in the original series. Most fanfics tend to explore their relationship in a positive or angsty but not murderous way. So, it's not a common or well - received concept in non - out - there fanfic ideas.
One way could be through self - sacrifice. If Inuyasha were to put himself in great danger to save Kagome from an even greater threat, it would show his true feelings for her. He could also openly admit his mistakes and beg for forgiveness, vowing to never let his past feelings for Kikyo cloud his judgment again.
In fanfiction, their relationship develops gradually. They start with a bit of mistrust, especially Inuyasha who is guarded. But as they go on adventures together, they begin to rely on each other more. Kagome's healing powers and her ability to see the good in Inuyasha are key factors.