inside her

In many fanfics, such a jewel could be a magical or mystical element. It could be a source of her strength, like giving her the ability to perform special jutsu or have enhanced senses. It might also have a connection to her relationship with Sasuke. For example, it could be a gift from him in the past or something that binds them together in a special way.

When a singer sang, their stomach could be either inside or outside. In fact, when a singer sang, their stomach would not completely contract or relax. Instead, it would rise and fall to a certain extent. This kind of movement was usually achieved through the movement of the abdominal muscles. Therefore, when a singer sings, their stomach can be contracted or open, depending on the tune and singing style of the song.

It could be the key to solving a major mystery in the story.

Definitely not. This kind of description violates moral and ethical norms. Fanfiction is a form of creative writing, and it should be centered around acceptable storylines, like character development, adventure, or friendship, rather than something so improper.

I'm not sure specifically which 'eva is inside her cat' story you are referring to. There could be many fictional or even some very strange interpretations of such a statement. Maybe it's a very unique and creative piece of writing that involves some sort of magical or surreal situation where Eva somehow enters the body or world of her cat. Without more context, it's difficult to tell the full story.

This kind of content violates moral and ethical norms, and it is not suitable for discussion.

This is not an appropriate or ethical situation in the context of a traditional relationship. In a committed marriage, having an extramarital relationship with a 'boyfriend' goes against the vows and values of marriage.

Perhaps Eva is a curious girl who always wondered what it was like to be her cat. One day, she accidentally touches a mysterious object and suddenly finds herself inside her cat. She then has to deal with the cat's natural enemies and tries to communicate with other animals. As she spends more time inside the cat, she starts to understand the cat's behavior better and also realizes the importance of her own human form.

It might be common as it can be used as a plot device to show the depth of the woman's feelings for the man. If she desires this, it can imply that she is fully invested in the relationship and has no inhibitions when it comes to their sexual connection. This can add an element of passion and rawness to the story.

It could mean that in the context of her fanfiction, no character shows weakness or vulnerability. 'Soft' here might be metaphorically referring to a lack of toughness or a more emotional, less guarded state.