Primogenitor in Marvel

I am a relatively old reader of novels and had always wanted to try writing and here we are at my first attempt, English is not my first language so I might have some trouble with spelling.

This is an MCU fanfic so it will be AU as there will be some differences from the original movies and I don't plan on adding mutants or any fictional universes like the anime or other movies.

This will be a harem but something really small I don't think there will be more than 5 women since I don't like it when the harem is very big since the interaction between the characters is lost, there will be scenes for adults but they are very light things, I have no experience writing this kind of scenes

I do not own the rights to any character or image shown in this Fanfic