My Son, My Beginning

Disclaimer: I do not own Demon Slayer or any characters (execpt my OCs). Those rightfully belong to the creators of said show/movies/manga. I am just a really big fan and wanted one of my "What ifs" to be placed in the world. I also do not own the pictures used for visual effects.
That being said, please do not use my ocs, the 'plotline', or my idea without explicit permission.
This story is also teen-friendly/safe for work. There are is a ship. I will place a mentions of childbirth complications and implied mentions of abuse (only briefly talked about). If you, or anyone you know, are in an abusive situation: please seek help. There is no shame, is it not your fault and you deserve better.
This is the main thing, you can skip the rest of the "summary" and read!

This is another one-shot story of an idea that came to mind. It is known that Sanemi Shinazugawa eventually had at least one child. This idea is based off that, but brought sooner: What if Sanemi Shinazugawa married and had a son earlier in the timeline?
This is an alternative timeline (can be placed in the same timeline as Mizu-Oni: Water Demon and Yako: The Fox Demon), where everything is *slightly* off-track. I have many more ideas similar to this, but decided that they should have their own spotlight. Other stories that have been published is Mizu-Oni: Water Demon and Yako: The Fox Demon.

Please vote and let me know if you would like me to explore this in depth or a personal request on another "what if" you might have.

By the way, this is an English Written version. This means I didn't use honorifics (such as ~san, ~chan, etc) or many Japanese words (such as big brother, sister, etc). I did end up using a couple due to how they fit the story better than English ones/were easier to distinguish.

I'm sorry for the long "summary" but I hope you enjoy the one-shot!