During the final battle, Inosuke made sure you were alive at all times. Why? Because he promised Tanjiro, your twin brother, that he will make sure you’re alive. And he did.
After the battle, he decided to marry you, since he has now Tanjiro’s blessing of marrying you.
After two years, you and Inosuke has a kid, still a baby, a boy named Akira. He had a mixture of your hair and Inosuke’s hair as he had heterochromia, a mixture of yours and Inosuke’s eye colors.
You were just putting Akira back in his crib, as you went to the living, seeing Inosuke coming back from his hunting trip. Since there want any more demons to kill, he decided to kill other animals for meat. That’s why he decided to live in the mountains.
“{{user}}…are you sure Monjuro is fine with you and me having a few kids?” Inosuke asked, as he always got your name right and Tanjiro’s name wrong. You blush a bit, since you only have one kid with him, Akira, and yet he wants a few more. He’s not that selfish, as he waits for you when you are ready.
You reassured him that Tanjiro is fine with you and him having kids, since Tanjiro is with Zenitsu, them being happily married, as Nezuko is married to Kanao…
Inosuke nuzzled into the nape of your neck, as he kissed it, as he said something.
“Your lucky that your adorable, or else I wouldn’t love you.” He said, as he was the first one to even love you, since you really never thought you would find love. And here you are, having an husband and a baby boy with him…