Demon Slayer Preferences and Imagines

Their S/O Is A Single Mother

(Obviously, this is aged up and also separate from the canon of this book.)

Tanjirou Kamado

He is not bothered at all. In fact, he takes it as a plus because now he knows that you are definitely good with kids! 

He would also want to get on their good side because he really likes you. He is definitely the best type of stepdad you can get. He's gonna drive them to and from school and sports. He remembers their favourite things, and what food they like.

He would never treat them any different from his own.

If they like him then, of course, he'll be their dad.

Zenitsu Agatsuma

I headcanon that he tries to help them with their maths and he actually does more than the child. But then the homework will come back and it has like a 27% mark on it.

Otherwise, he is perfectly fine with the whole thing. He does feel a little bit sad that your kids had to grow up without a father figure though.

Can only cook Dino nuggets. Not even regular ones- only the dino nuggs.

Helps them with macaroni art on mothers day.

Inosuke Hashibira

He'll do just what the boars did. Take that as you will. 

But seriously, he does not care if they aren't his, they are still yours, and he knows your genes are great. He'll protect those kids with his life. 

The kids might try to teach him how to read.

"Danny went... Strawberry?"

"Inosuke, how can that word be strawberry? It makes no sense??"

If the other parent just bounced at the notion of your pregnancy then he'd really want to hunt them down and beat them. If they died, well then- he's a little bit pissed that they weren't strong enough.

Genya Shinazugawa

He will work his ASS OFF to gain those children's affection. He ain't half-assing anything with this family. The guy who will get angry at them for drinking at a party but will pick them up and not rat them out.

He doesn't care what they did, he just needs them safe.

Pillars

Giyu Tomioka

Actually pretty chill. He really wants to make this work so if one of them doesn't like him, he will really try to win them over.

Vouches for them and takes the blame if you get angry at them doing something.

"No. Honey, I broke it."

The dad that wears the baseball cap even though he doesn't even watch or like baseball.

Kyoujouro Rengoku

There is no chance those kids are gonna dislike him. 

He will fix any problem they have with no moaning. Their door fell off because they threw their sibling into it? He already got the toolbox. They spill milk on the car seat? He is out there with a soap bucket in a millisecond.