It could be described as tense at first. The female Inuyasha would be on guard, her ears perked up, and her sword at the ready. Sesshomaru's mother, with her regal and intimidating presence, would look down on the female Inuyasha. But as they exchange words, there could be a sense of mutual curiosity. The air would be filled with a strange energy, a mix of suspicion and the potential for something more, like an unexpected friendship or alliance.
One possible plot could be that the female Inuyasha stumbles upon Sesshomaru's mother's territory while on a journey. Maybe she's in search of something, like a powerful artifact. Sesshomaru's mother, being a powerful and mysterious figure, initially sees her as an intruder. But as the female Inuyasha shows her tenacity and perhaps a bit of kindness, they start to have a more amicable relationship. The female Inuyasha could learn some ancient secrets or powers from her, which she then uses to help her friends or to face her own inner demons.
One common theme is the exploration of a different dynamic between them. Since Inuyasha and Sesshomaru have a complex relationship in the original series, in fanfics with female versions, it could be about them forming an unexpected alliance. Another theme is romance. Fans often like to write about a romantic relationship developing between the female Inuyasha and Sesshomaru, which could be a slow - burn or a more sudden attraction.
In some fanfictions, Sesshomaru being Inuyasha's father can lead to really interesting plot developments. For example, it can create complex family dynamics. There might be stories where Sesshomaru has to come to terms with his new - found fatherhood and how it changes his relationship with Inuyasha, who he may have previously seen as an enemy or a rival. It also allows for exploring Inuyasha's feelings towards having a father figure like Sesshomaru, who is such a powerful and complex character in the Inuyasha universe.
One possibility is that there would be an initial sense of unease. Inutachi, being a group with different personalities and allegiances, might approach Sesshomaru's mother with caution. Maybe they would be in awe of her power and grace, given Sesshomaru's own formidable nature. For example, Kagome could be curious about her knowledge of the feudal era's magic and lore.
One common theme is family. Since they are brothers, these fanfics often explore their family ties, like how their father's absence or presence affected them as babies. Another theme is rivalry. Even as babies, their different natures could lead to a sort of rivalry, which is often explored in these fanfics.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). It has a large collection of fanfics, and you can use the search function to specifically look for stories involving female Inuyasha and Sesshomaru. Another option is Fanfiction.net, which also has a wide range of fan - created stories. Just be sure to read the tags and summaries to find the ones that suit your taste.
One common theme could be the exploration of their relationship transformation. From being enemies or at least not on friendly terms, they now have a very intimate connection through the pregnancy. Another theme might be the acceptance within their society. Since this is such an unusual situation, how do the other demons or humans around them accept or reject this union and the upcoming child.
Fanfics should be a medium for positive and creative exploration of characters. Instead of 'lemon' fanfics, consider looking for ones that delve into the cultural and mythological aspects of Inuyasha and Sesshomaru's world. There could be fanfics that explain more about their demon heritage, or how they interact with other characters from their universe in a more in - depth and non - inappropriate way.
One common theme is the forbidden love aspect. Since Kagome is often paired with Inuyasha in the original series, a relationship with Sesshomaru goes against the expected. Another theme is power dynamics, as Sesshomaru is a very powerful demon and Kagome has her own unique powers.